Rozprawy doktorskie: „Augmented Reality applications”

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Drews, Timothy. "Shared augmented reality: a framework for networked augmented reality applications". Thesis, McGill University, 2013. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=119674.

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In this thesis we detail the development of a software framework for networked augmented reality applications. We discuss vision-based tracking of planar surfaces, sensor fusion based pose estimation, and the overall implementation of our system. The primary focus of this thesis is our sensor fusion based tracking approach, which uses a novel extended Kalman filter formulation that takes advantage of the group structure of rotations. We provide an extensive derivation of this formulation, and validate the approach using both simulation and ground truth data obtained via a motion capture system.
Dans cette thèse, nous détaillons le développement d'une architecture logicielle dédiée à réalité augmentée en réseau. Nous explorons plusieurs procédés de la vision numérique tels que la détection et suivi de surfaces planes et la localisation spatiale à partir de plusieurs capteurs et discutons de la conception de notre système. Cette thèse se concentre principalement sur la combination d'information sensorielle provenant de plusieurs sources. Notre technique utilise une nouvelle extension du filtre de Kalman qui exploite la structure des rotations. Nous offrons une dérivation extensive de cette formulation et nous validons cette approche d'une part par des données simulées mais aussi par des données réelles obtenues par un système de capture de mouvement.

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Di, Capua Massimiliano. "Augmented reality for space applications". College Park, Md.: University of Maryland, 2008. http://hdl.handle.net/1903/8599.

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Thesis (M.S.) -- University of Maryland, College Park, 2008.
Thesis research directed by: Dept. of Aerospace Engineering. Title from t.p. of PDF. Includes bibliographical references. Published by UMI Dissertation Services, Ann Arbor, Mich. Also available in paper.

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Häger, Ellen. "Enhanced Immersion in Augmented Reality Applications". Thesis, Linköpings universitet, Institutionen för systemteknik, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-145217.

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This thesis will examine and evaluate different mechanics that could be used in games using augmented reality. Augmented reality, the technology used to integrate computer-generated images with the real world environment, allows developers to enhance a user's gaming experience.The different mechanics will focus on immersion and on user engagement and examine which of the two is more important in games. This is examined by implementing the different mechanics in an application for a Google Tango tablet. Immersion is created by letting the environment act on virtual objects, via occlusion culling. The virtual agent interacts with the real world to generate engagement. The different methods are surveyed online, and user tests performed with the application. The results showed how the concept of combining the surveyed methods of generating immersion and engagement using augmented reality was successful.

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Löfvendahl, Björn. "Augmented Reality Applications for Industrial Robots". Thesis, Umeå universitet, Institutionen för tillämpad fysik och elektronik, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-87146.

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Augmented reality (AR) is a way of overlaying digital information onto a picture or a videofeed and has been used in industrial contexts for more than 20 years. This Master's Thesis examines if AR can be used to help maintenance engineers set up and maintain robot environments by visualizing robot movement and safety zones. The main result of the Master's Thesis is a prototype application for a tablet computer. The user points the tablet towards a robot filming it and the video feed is displayed on the screen. This video feed is augmented with a virtual zone displayed around the robot, illustratingthe area where the robot is allowed to move. The application fetches the coordinatesfor the zone from the safety system SafeMove { a system designed by ABB to increase safetyand allow closer human-robot collaboration.The visualization of a SafeMove conguration is currently limited to an image of atwo-dimensional coordinate system showing the zone as a set of dierent coordinates. Thismakes it dicult grasping the full layout of the three-dimensional zone. By using theapplication the user gets a better view of the layout, allowing the user to look at the robot from different sides and see the safety zone projected around the robot. User tests show that people working with SafeMove could benefit from using the application to verify the conguration of SafeMove systems and the conclusion is that AR, if used right, greatly can improve robot interaction and maintenance.

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Michel, Thibaud. "On mobile augmented reality applications based on geolocation". Thesis, Université Grenoble Alpes (ComUE), 2017. http://www.theses.fr/2017GREAM068/document.

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Les applications de réalité augmentée peuvent être conçues de différentes manières, mais encore très peu tirent partie de la géolocalisation.Pourtant, aujourd'hui, avec la multitude de capteurs embarqués dans nos smartphones et nos tablettes, l’utilisation de la géolocalisation dans le contexte de la RA (RA Geo) semble très prometteuse.Dans ce travail de thèse, nous avons contribué sur plusieurs aspects fondamentaux de la RA Geo: l'estimation de la position du dispositif, l'estimation de son orientation, ainsi que sur l'impact de ces estimations sur le rendu des informations virtuelles.Dans un premier temps, nous avons étudié l'estimation de l’orientation du téléphone.Nous avons réalisé le premier benchmark dans un motion lab afin de comparer et d'évaluer les différents filtres de la littérature sur une base commune.Celui-ci a permis de produire la première analyse comparative approfondie des différentes approches.Nous avons aussi proposé un nouveau filtre dont le but est de minimiser l’effet des perturbations magnétiques omniprésentes en intérieur et avons quantifié son apport par rapport aux techniques existantes.Dans un deuxième temps, nous avons étudié l'estimation de la position du téléphone lorsqu’il est porté par un piéton.Il existe de nombreux travaux sur les technologies de localisation mais il est difficile de trouver un benchmark qui évalue les différentes technologies dans le cas d’un smartphone grand public. Ainsi, à nouveau nous avons produit le premier benchmark pour analyser de façon comparative les différentes techniques de localisation qui peuvent être utilisées avec un smartphone.Dans un troisième temps, nous avons proposé une méthode pour caractériser l'impact des estimations d'orientation et de positionnement sur le rendu des informations virtuelles.Ceci a permis d'identifier des critères permettant de comprendre plus précisément les limites de faisabilité de différent cas d'utilisation de la RA Geo.Enfin, nous avons proposé un nouveau framework pour faciliter la conception d’applications de la RA Geo.Nous montrons comment les données de cartographie peuvent être utilisées et enrichies à l’aide d’une nouvelle sémantique utilisant OpenStreetMap.Nous avons créé un visualiseur permettant d'afficher des éléments virtuels sur le flux de la caméra.Ce framework intègre différents modules pour la localisation, l’orientation, la gestion des points d'intérêts, le geofencing, l’audio spatialisé, et le rendu 2D ou RA.Finalement, trois exemples d'applications d'AR Géo ont été réalisés à partir de ce framework.TyrAr est une application pour visualiser des informations sur les sommets et les villes environnantes.AmiAr permet de contrôler de certains objets de domotique dans un appartement connecté.Venturi Y3 est une visite guidée de la ville de Grenoble avec des expériences de RA avec de l'audio
Applications for augmented reality can be designed in various ways, but few take advantage of geolocation.However, nowadays, with the many cheap sensors embedded in smartphones and tablets, using geolocation for augmented reality (Geo AR) seems to be very promising.In this work, we have contributed on several aspects of Geo AR: estimation of device positioning and attitude, and the impact of these estimations on the rendering of virtual information.In a first step, we focused on smartphone attitude estimation.We proposed the first benchmark using a motion lab with a high precision for the purpose of comparing and evaluating filters from the literature on a common basis.This allowed us to provide the first in-depth comparative analysis in this context.In particular, we focused on typical motions of smartphones when carried by pedestrians.Furthermore, we proposed a new technique for limiting the impact of magnetic perturbations with any attitude estimation algorithm used in this context.We showed how our technique compares and improves over previous works.In a second step, we studied the estimation of the smartphone's position when the device is held by a pedestrian.Altough many earlier works focused on evaluation of localisation systems, it remains very difficult to find a benchmark to compare technologies in the setting of a commodity smartphone. Once again, we proposed a novel benchmark to analyse localisation technologies including WiFi fingerprinting, WiFi trilateration, SHS (Step and Heading System) and map-matching.In a third step, we proposed a method for characterizing the impact of attitude and position estimations on the rendering of virtual features.This made it possible to identify criteria to better understand the limits of Geo AR for different use cases.We finally proposed a framework to facilitate the design of Geo AR applications.We show how geodata can be used for AR applications.We proposed a new semantics that extends the data structures of OpenStreetMap.We built a viewer to display virtual elements over the camera livestream.The framework integrates modules for geolocation, attitude estimation, POIs management, geofencing, spatialized audio, 2.5D rendering and AR.Three Geo AR applications have been implemented using this framework.TyrAr is an application to display information on mountain summits and cities around the user.AmiAr allows one to monitor lights, shutters, tv in a smart appartment.Venturi Y3 is an AR-Tour of Grenoble with audio description and experiences

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Taylor, Simon John. "Fast object localisation for mobile augmented reality applications". Thesis, University of Cambridge, 2012. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.610762.

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Yan, Yongzhe. "Deep Face Analysis for Aesthetic Augmented Reality Applications". Thesis, Université Clermont Auvergne‎ (2017-2020), 2020. http://www.theses.fr/2020CLFAC011.

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La détection précise et robuste des composants faciaux est d’une grande importance pour la bonne expérience utilisateur dans les applications de réalité augmentée à destination de l’industrie esthétique telles que le maquillage virtuel et la coloration virtuelle des cheveux. Dans ce contexte, cette thèse aborde le problème de la détection des composants faciaux via la détection des repères faciaux et la segmentation des composantes faciales. Cette thèse se concentre sur les modèles basés sur l’apprentissage profond.La première partie de cette thèse aborde le problème de la détection des repères faciaux. Nous proposons trois contributions. Pour la première contribution de cette partie, nous visons à améliorer la précision de la détection. Afin d’améliorer la précision au niveau des pixels, nous proposons un framework grossier à fin qui exploite les informations détaillées sur les feature maps de bas niveau dans le modèle. Nous formons différentes étapes avec différentes fonctions de coût, parmi lesquelles nous proposons une fonction sensible aux contours qui force les points de repère estimés à rester sur le contour de composants faciaux. Dans la deuxième contribution de cette partie, nous améliorons la robustesse de la détection des repères faciaux. Nous proposons une fonction de coût, basée sur la distance Wasserstein, pour intégrer des informations géométriques supplémentaires lors de l’apprentissage. De plus, nous proposons plusieurs modifications aux métriques d’évaluation conventionnelles pour mieux appréhender la robustesse du modèle.Pour fournir une nouvelle perspective sur la détection des repères faciaux, nous présentons une troisième contribution sur l’exploration d’un nouvel outil pour illustrer la relation entre les repères faciaux. Nous étudions l’analyse canonique de corrélation (CCA) des coordonnées du point de repère. Deux applications sont introduites avec cet outil: (1) l’interprétation de différents modèles pour la détection de points de repère (2) une nouvelle méthode d’apprentissage faiblement supervisé qui permet de réduire considérablement l’effort manuel pour l’annotation dense de points de repère.La deuxième partie de cette thèse aborde le problème de la segmentation des composantes faciales. Nous proposons deux contributions. Dans la première contribution dans cette partie, nous présentons un framework pour la segmentation des cheveux, afin d’améliorer la robustesse sur les arrière-plans complexes. De plus, un module d’attention spatiale est attaché à ce framework pour améliorer les résultats sur le contour des cheveux. Dans la deuxième contribution de cette partie, nous présentons un framework rapide de segmentation des composantes faciales pour les téléphones mobiles, qui utilise la cohérence temporelle pour produire un masque de sortie plus robuste. L’implémentation de ce framework s’exécute en temps réel sur un iPhone X
Precise and robust facial component detection is of great importance for the good user experience in aesthetic augmented reality applications such as virtual make-up and virtual hair dying. In this context, this thesis addresses the problem of facial component detection via facial landmark detection and face parsing. The scope of this thesis is limited to deep learning-based models.The first part of this thesis addresses the problem of facial landmark detection. In this direction, we propose three contributions. For the first contribution, we aim at improving the precision of the detection. To improve the precision to pixel-level, we propose a coarse-to-fine framework which leverages the detail information on the low-level feature maps. We train different stages with different loss functions, among which we propose a boundary-aware loss that forces the predicted landmarks to stay on the boundary. For the second contribution in facial landmark detection, we improve the robustness of facial landmark detection. We propose 2D Wasserstein loss to integrate additional geometric information during training. Moreover, we propose several modifications to the conventional evaluation metrics for model robustness.To provide a new perspective for facial landmark detection, we present a third contribution on exploring a novel tool to illustrate the relationship between the facial landmarks. We study the Canonical Correlation Analysis (CCA) of the landmark coordinates. Two applications are introduced based on this tool: (1) the interpretation of different facial landmark detection models (2) a novel weakly-supervised learning method that allows to considerably reduce the manual effort for dense landmark annotation.The second part of this thesis tackles the problem of face parsing. We present two contributions in this part. For the first contribution, we present a framework for hair segmentation with a shape prior to enhance the robustness against the cluttered background. Additionally, we propose a spatial attention module attached to this framework, to improve the output of the hair boundary. For the second contribution in this part, we present a fast face parsing framework for mobile phones, which leverages temporal consistency to yield a more robust output mask. The implementation of this framework runs in real-time on an iPhone X

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Mahmood, Zahid. "Enhanced Augmented Reality Framework for Sports Entertainment Applications". Diss., North Dakota State University, 2015. http://hdl.handle.net/10365/25324.

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Augmented Reality (AR) superimposes virtual information on real-world data, such as displaying useful information on videos/images of a scene. This dissertation presents an Enhanced AR (EAR) framework for displaying useful information on images of a sports game. The challenge in such applications is robust object detection and recognition. This is even more challenging when there is strong sunlight. We address the phenomenon where a captured image is degraded by strong sunlight. The developed framework consists of an image enhancement technique to improve the accuracy of subsequent player and face detection. The image enhancement is followed by player detection, face detection, recognition of players, and display of personal information of players. First, an algorithm based on Multi-Scale Retinex (MSR) is proposed for image enhancement. For the tasks of player and face detection, we use adaptive boosting algorithm with Haar-like features for both feature selection and classification. The player face recognition algorithm uses adaptive boosting with the LDA for feature selection and nearest neighbor classifier for classification. The framework can be deployed in any sports where a viewer captures images. Display of players-specific information enhances the end-user experience. Detailed experiments are performed on 2096 diverse images captured using a digital camera and smartphone. The images contain players in different poses, expressions, and illuminations. Player face recognition module requires players faces to be frontal or up to ?350 of pose variation. The work demonstrates the great potential of computer vision based approaches for future development of AR applications.
COMSATS Institute of Information Technology

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Head-Mears, James Bradley. "Accurate wide-area tracking for architectural, engineering and surveying applications". Thesis, University of Canterbury. HIT Lab NZ, 2013. http://hdl.handle.net/10092/11052.

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Augmented Reality (AR) is a powerful tool for the visualisation of, and interaction with, digital information, and has been successfully deployed in a number of consumer applications. Despite this, AR has had limited success in industrial applications as the combined precision, accuracy, scalability and robustness of the systems are not up to industry standards. With these characteristics in mind, we present a concept Industrial AR (IAR) framework for use in outdoor environments. Within this concept IAR framework, we focus on the improving the precision and accuracy of consumer level devices by focusing on the issue of localisation, utilising LiDAR based point clouds generated as part of normal surveying and engineering workflow. We evaluate key design points to optimise the localisation solution, including the impact of increased field of view on feature matching performance, the filtering of feature matches between real imagery and an observed point cloud, and how pose can be estimated from 2D to 3D point correspondences. The overall accuracy of this localisation algorithm with respect to ground-truth observations is determined, with unfiltered results indicating an on par horizontal accuracy and significantly improved vertical accuracy with best-case consumer GNSS solutions. When additional filtering is applied, results of localisation show a higher accuracy than best-case consumer GNSS.

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Lin, Owen. "The development of network enabled augmented reality mobile applications". Thesis, Massachusetts Institute of Technology, 2010. http://hdl.handle.net/1721.1/61171.

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Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2010.
Cataloged from PDF version of thesis.
Includes bibliographical references (p. 59).
In this thesis, I designed, implemented, and evaluated network-enabled augmented reality mobile applications by extending an implementation of the MITAR iPhone client designed by the Scheller Teacher Education Program. In particular, I designed a multiplayer version of the client, which allows multiple users to interact with each other in a single game across multiple handsets and multiple platforms, and a data collection service that allows users to log media (such as pictures and text) throughout the duration of their game. The end result is an augmented reality client that fully takes advantage of the ubiquitous network connectivity offered by most modern mobile handsets.
by Owen Lin.
M.Eng.

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Klint, Emma. "Un-blackboxing Augmented Reality For Future Digital Health Applications". Thesis, KTH, Skolan för elektroteknik och datavetenskap (EECS), 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-229708.

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Previous research on augmented reality has to great extent been focusing on exploring and expanding technical possibilities without considering what users find to be desirable and useful. By using the inspirational bits method and the limitations of current AR technologies as a source of inspiration, this research makes use of the existing technical knowledge on AR for inspiring new ideas on how to use AR. The inspirational bits method aims to increase the understanding of a material by letting the participants experience a specific feature of a technology called bit and thereby making the technology more tangible. A set of inspirational bits was designed, developed and used in workshops to inspire ideas on how to use AR for future health applications. Two technical concepts were highlighted in the bits, detection of real objects and placement of digital objects in the real environment. Two types of experiences were also highlighted in one bit each; annotation experiences where additional information is attached to physical objects and visualization experiences where users interact with a virtual object. The bits were explored in workshops followed by a rapid brainstorming session to quickly get their ideas down to paper. It seems to have been easier to come up with ideas on annotation experiences compared to visualization experiences which might be due to their initial expectation that AR will be used as a tool for adding digital interactions to the real world, similar to how annotated experiences work. Since a lot of the topics used were about external objects affecting one’s body and health, annotated experiences might be more appropriate as it can be used to attach private information to public objects.
Tidigare forskning om förstärkt verklighet har i stor utsträckning fokuserat på att utforska och expandera tekniska möjligheter utan att ta hänsyn till vad användarna tycker är önskvärt och användbart. Genom att använda Inspirational Bits metoden och begränsningarna av nuvarande AR-teknik som inspirationskälla använder denna forskning den befintliga tekniska kunskapen om AR för inspirera till nya idéer om hur man kan använda AR. Inspirational Bits metoden syftar till att öka förståelsen av ett material genom att låta deltagarna uppleva en specifik egenskap hos en teknik, kallad bit, och därigenom göra tekniken mer konkret. En uppsättning Inspirational Bits har designats, utvecklats och använts i workshops för att inspirera idéer om hur man kan använda AR i framtida hälsoapplikationer. Två tekniska koncept lyfts fram, detektion av verkliga objekt och placering av digitala objekt i en verklig miljö. Två typer av upplevelser lyfts också fram; annoteringsupplevelser där ytterligare information är kopplad till fysiska objekt och visualiseringsupplevelser där användare interagerar med ett virtuellt objekt. Bitarna utforskades i workshops följt av en snabb brainstorming för att snabbt få deltagarnas idéer på papper. Det verkar ha varit lättare att komma på idéer om annoteringsupplevelser jämfört med visualiseringserfarenheter vilket kan bero på att deltagarna förväntade att AR kommer att användas som ett verktyg för att åstadkomma digitala interaktioner i den verkliga världen, liknande hur annoteringsupplevelser fungerar. Eftersom många av de hälsoämnen som togs upp handlar om externa föremål som påverkar kroppen och hälsan kan annoteringsupplevelser vara mer lämpliga eftersom det kan användas för att fästa privat information till offentliga objekt.

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Feng, Xiayu. "Liquid Crystal Polarization Volume Hologram for Augmented Reality Applications". Kent State University / OhioLINK, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=kent1619646439873892.

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Siewert, Jan Luca, Matthias Neges i Detlef Gerhard. "Ein Klassifizierungssystem für Industrielle Augmented Reality Anwendungen". Thelem Universitätsverlag & Buchhandlung GmbH & Co. KG, 2021. https://tud.qucosa.de/id/qucosa%3A75882.

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Mit dem Fortschreiten der Digitalisierung in der Industrie findet sich Augmented Reality (AR) in immer mehr Einsatzbereichen. Dennoch bleibt die industrielle Verbreitung trotz sich stetig entwickelnder Technik hinter den Prognosen zurück. Es existieren bereits Arbeiten, die sich mit der Klassifizierung von AR jedoch mit Fokus auf die tatsächliche Implementierung bzw. Umsetzung der Anwendung beschäftigen. Um Anwendungsgebiete und damit die eigentliche Problemstellung, in denen AR einen Mehrwert bieten kann, besser vergleichen und Anforderungen für industrielle Bereiche ableiten zu können, stellt dieser Beitrag ein Klassifizierungssystem für diese Einsatzgebiete vor. Auf vorhergehenden Arbeiten aufbauend wird gezeigt, dass eine Klassifizierung der Einsatzszenarien auf Basis der drei Dimensionen zu unterstützende Aktion, Lebenszyklusphase und Grad der Hilfestellung erfolgen kann. Dazu wird eine systematische Literaturrecherche von industriellen AR Anwendungen und Studien der Jahre 2016 bis 2020 durchgeführt und nach dem vorgeschlagenen Schema klassifiziert. Neben den daraus gewonnen Erkenntnissen werden in den Beiträgen verwendete Technologien, wie die Darstellungstechnik, der Detailierungsgrad, der Reifegrad der Anwendung und die Art der Inhaltserstellung analysiert. Außerdem werden Probleme bei der Umsetzung sowie künftige Forschungsthemen und -schwerpunkte herausgearbeitet.

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Marcelo, Xavier Natário Teixeira João. "Finding an adequate escape pod to real time augmented reality applications". Universidade Federal de Pernambuco, 2009. https://repositorio.ufpe.br/handle/123456789/2270.

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Made available in DSpace on 2014-06-12T15:56:01Z (GMT). No. of bitstreams: 2 arquivo2386_1.pdf: 2486508 bytes, checksum: 840656846098d64ece51b53216ff079b (MD5) license.txt: 1748 bytes, checksum: 8a4605be74aa9ea9d79846c1fba20a33 (MD5) Previous issue date: 2009
Conselho Nacional de Desenvolvimento Científico e Tecnológico
Marcelo Xavier Natário Teixeira, João; Kelner, Judith. Finding an adequate escape pod to real time augmented reality applications. 2009. Dissertação (Mestrado). Programa de Pós-Graduação em Ciência da Computação, Universidade Federal de Pernambuco, Recife, 2009.

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Antoniac, P. (Peter). "Augmented reality based user interface for mobile applications and services". Doctoral thesis, University of Oulu, 2005. http://urn.fi/urn:isbn:9514276965.

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Abstract Traditional design of user interfaces for mobile phones is limited to a small interaction that provides only the necessary means to place phone calls or to write short messages. Such narrow activities supported via current terminals suppress users from moving towards mobile and ubiquitous computing environments of the future. Unfortunately, the next generation of user interfaces for mobile terminals seems to apply the same design patterns as commonly used for desktop computers. Whereas the desktop environment has enough resources to implement such design, capabilities of the mobile terminals fall under constraints dictated by mobility, like the size and weight. Additionally, to make mobile terminals available for everyone, users should be able to operate them with minimal or no preparation, while users of desktop computers will require certain degree of training. This research looks into how to improve the user interface of future mobile devices by using a more human-centred design. One possible solution is to combine the Augmented Reality technique with image recognition in such a way that it will allow the user to access a "virtualized interface". Such an interface is feasible since the user of an Augmented Reality system is able to see synthetic objects overlaying the real world. Overlaying the user's sight and using the image recognition process, the user interacts with the system using a combination of virtual buttons and hand gestures. The major contribution of this work is the definition of the user's gestures that makes it possible for human-computer interaction with such Augmented Reality based User Interfaces. Another important contribution is the evaluation on how mobile applications and services work with this kind of user interface and whether the technology is available to support it.

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Bystam, Fredrik. "Improving motion tracking using gyroscope data in Augmented Reality applications". Thesis, KTH, Datorseende och robotik, CVAP, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-166186.

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As commissioned by Bontouch AB, this project contains the attempt to create an Augmented Reality application for smartphones, where a parcel is visualised in order for a user to get a comprehensive image of the parcel size. The main focus of the project was to create an eectively running en- gine that can process images for computer vision, in order to determine the pose of the smartphone camera. The experi- ment explored the possibilities of using gyroscope measure- ments between input images in order to formulate valid as- sumptions of upcoming images using homographies. These assumptions were meant to unburden the computer vision engine, creating very high performance. The ultimate goal of the engine was to track the motion of a known reference object in the image, with high precision. The proposed method performed adequately, improving reliability of the motion tracking algorithms. The resulting mobile application, run on an iPhone 5S, could perform camera pose estimation at up to 60 times per second, at a video camera feed resolution of 1280x720 pixels. This high performance resulted in a very stable rendition of the parcel.
Som ett uppdrag från Bontouch AB innehåller det här pro- jektet ett försök att skapa en Augmented Reality-applikation för smartphones, där postpaket ska visualiseras för att ge användare en förstärkt bild av paketets storlek. Huvudfo- kus i projektet var att bygga en eektiv motor som kan behandla bilder för datorseende, för att beräkna positionen och riktningen på mobilkameran. Experimentet utforskade möjligheterna för att använda gyroskopdata mellan bilder för att formulera giltiga antaganden hos kommande bilder med hjälp av homografier. Dessa antaganden vad ämna- de att avlasta motorn för datorseende, för att åstadkomma hög prestanda. Målet var att motorn skulle följa rörelsen hos ett givet referensobjekt i bilden, och att göra det med hög precision. Den föreslagna metoden presterade tillräckligt, och för- bättrade pålitligheten hos algoritmerna för att följa objek- tets rörelser. Mobilapplikationen som byggdes, och kördes på iPhone 5S, kunde beräkna kamerans position of riktning upp till 60 gånger per sekund, när videokameran försåg mo- torn med bilder med 1280x720 pixlars upplösning. Den höga prestandan resulterade i en väldigt stabil bild av paketet.

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Bostanci, Gazi Erkan. "User tracking methods for augmented reality applications in cultural heritage". Thesis, University of Essex, 2014. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.616992.

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Augmented Reality provides an entertaining means for displaying 3D reconstructions of ancient buildings in situ for cultural heritage. Finding the pose, position and orientation, of the user is crucial for such applications since this information will be used to define the viewpoint that will be used for rendering the models. Images acquired from a camera can be used as the background for such augmentations . To make the most out of this available information, these images can also be utilized to find a pose estimate. This thesis presents contributions for vision-based methods for estimating the pose of the user in both indoor and outdoor environments. First an evaluation of different feature detectors is presented, making use of spatial statistics to analyse the distribution of the features across the image, a property that is shown to affect the accuracy of the homography calculated from these features . An analysis of various filtering methods used for tracking was performed and an implementation of a SLAM system is presented. Due to several problems faced with this implementation, there is insufficient tracking accuracy due to linearity problems. An alternative, keyframe-based tracking algorithm is presented. Continuing with vision-based approaches, Kinect sensor was also used to find the pose of a user for in situ augmentations making use of the natural features in the environment. Skeleton-tracking was also found to be beneficial for such applications. The thesis then investigates combining the vision-based estimates with measurements from other sensors, GPS and DVIU, in order to improve the tracking accuracy in outdoor environments. The idea of using multiple models was investigated using a novel fuzzy rule-based approach to decide on the model that results in improved accuracy and faster convergence for the fusion filter. Finally, several AR applications are presented that make use of these methods . . The first one is for in situ augmentation for displaying historical columns and augmenting users , the second is a virtual visit to an ancient building and the third is a game which can also be played inside the augmentation of the building in the second application.

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Sittler, Gilles. "Conception of an augmented reality system for applications in surgery". Université Louis Pasteur (Strasbourg) (1971-2008), 2008. http://www.theses.fr/2008STR13154.

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Les systèmes de réalité augmentée ont pris une importance croissante dans de nombreux domaines. On peut citer par exemple la conception aéronautique, le domaine militaire ou encore l’instrumentalisation chirurgicale. Dans ce dernier domaine, les systèmes de réalité augmentée sont souvent utilisés à des fins de formation des chirurgiens, le fait de pouvoir superposer des éléments virtuels à la vision de l’environnement réel du chirurgien apportant un plus indéniable. Ce travail de thèse s’est articulé autour de la conception de la partie optique d’un tel système. Commençant par un travail bibliographique fourni, nous détaillons les différents types de systèmes et de domaines d’applications. Dans la seconde partie de ce manuscrit, nous présentons le cahier des charges du système que nous avons développé, dont les différentes caractéristiques ont pu être extraites de publications trouvées dans la littérature. Ces dernières nous ont permis d’établir un cheminement pour les simulations optiques qui ont été suivies, de même qu’un gabarit géométrique définissant l’encombrement du système à concevoir en tenant compte de l’application visée. Dans la troisième et dernière partie de cette étude, nous détaillons les différentes simulations optiques réalisées à l’aide du logiciel de tracé de rayons CodeV. En suivant les caractéristiques imposées par le cahier des charges, nous présentons les premières simulations utilisant uniquement des « singlets » de façon à assurer une conjugaison correcte entre pupille d’entrée et de sortie du système en n’utilisant qu’un unique point source sur l’axe. Nous détaillons ensuite les différents sous-systèmes conduisant à la simulation d’une grille complète de points sources. Concernant l’introduction de la courbure de l’axe optique de façon à intégrer le système dans le gabarit géométrique défini précédemment, nous introduisons un élément holographique en transmission et les simulations ayant été menées. Les dites simulations incluent des instructions spécialement développées pour CodeV de façon à pouvoir simuler le comportement de l’élément holographique en séparant sa surface en différentes surfaces de moindre taille et en reconstruisant cette mosaïque dans une étape ultérieure. Il est ainsi possible d’obtenir une solution idéale par zone et d’évaluer les performances de l’élément conçu. Le même travail a été mené pour l’élément holographique servant de combineur holographique et les résultats et perspectives sont présentés dans une dernière étape
Augmented reality systems are taking more and more importance in varied contexts. Aeronautic conception, military applications or conception of surgical tools are examples of possible applications of such systems. In this last field of application, augmented reality systems are mostly used for teaching purposes, using the capability of these systems to superimpose virtual elements onto the vision of the surgeon. This PhD work is articulated around the conception of the optical part of such a system. Starting with a detailed bibliographic work, we detail different type of systems and fields of application. Starting from this study, we concentrate our work on the medical applications, detailing different systems developed and present on the market. In the second part of this manuscript, we present the specifications of the system we developed, said specifications being extracted from relevant publications found in the literature. Additionally, the specifications obtained enable us to define a framework of the optical simulations that have been undergone and a geometrical framework in which the system should fit to be in accordance with the field of application aimed at. In the third and last part of this study, we detail the different simulations done using the ray tracing software CodeV. Following the specifications, we present a first approach using singlets ensuring a correct first order optics conjugation of entrance and exit pupils using a single on-axis point. Then, we detail the different steps followed for a complete grid of source points, describing the different consecutive subsystems simulated. For the introduction of the bending of the optical axis to fit the system in the geometrical framework, we introduce a transmission Holographic Optical Element and the simulations that have been undergone. These simulations include custom-made macros using CodeV programming language that had to be developed in order to split the surface of the transmission HOE in smaller areas. This mosaic of small HOEs enabled us to find an ideal solution for each of the sub-zone to simulate the behavior of the whole transmission HOE. The same procedure has been applied to the reflection HOE acting as a holographic combiner. By extracting the values of the diffraction efficiency from these simulations, we have been able to characterize the behavior of both HOEs

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19

Kuru, Muhammed Furkan. "A Script Based Modular Game Engine Framework For Augmented Reality Applications". Master's thesis, METU, 2009. http://etd.lib.metu.edu.tr/upload/3/12611037/index.pdf.

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Augmented Reality (AR) is a technology which blends virtual and real worlds. The technology has various potential application domains such as broadcasting, architecture, manufacturing, and entertainment. As the tempting developments in AR technology continues, the solutions for rapid creation of AR applications become crucial. This thesis presents an AR application development framework with scripting capability as a solution for rapid application development and rapid prototyping in AR. The proposed AR framework shares several components with game engines. Thus, the framework is designed as an extension of a game engine. The components of the framework are designed to be changable in a plug-in system. The proposed framework provides the developers with the ability of agile coding through the scripting language. Our solution embeds a dynamic scripting programming language (Python) in a strictly typed static programming language (C++) in order to achieve both agility and performance. The communication between the AR framework components and the scripting programming language is established through a messaging mechanism.

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20

Gundogdu, Erhan. "Feature Detection And Matching Towards Augmented Reality Applications On Mobile Devices". Master's thesis, METU, 2012. http://etd.lib.metu.edu.tr/upload/12614618/index.pdf.

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Local feature detection and its applications in different problems are quite popular in vision research. In order to analyze a scene, its invariant features, which are distinguishable in many views of this scene, are used in pose estimation, object detection and augmented reality. However, required performance metrics might change according to the application type
in general, the main metrics are accepted as accuracy and computational complexity. The contributions in this thesis provide improving these metrics and can be divided into three parts, as local feature detection, local feature description and description matching in different views of the same scene. In this thesis an efficient feature detection algorithm with sufficient repeatability performance is proposed. This detection method is convenient for real-time applications. For local description, a novel local binary pattern outperforming state-of-the-art binary pattern is proposed. As a final task, a fuzzy decision tree method is presented for approximate nearest neighbor search. In all parts of the system, computational efficiency is considered and the algorithms are designed according to limited processing time. Finally, an overall system capable of matching different views of the same scene has been proposed and executed in a mobile platform. The results are quite promising such that the presented system can be used in real-time applications, such as augmented reality, object retrieval, object tracking and pose estimation.

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21

Liu, Peiran. "Designing real-time vision-based augmented reality environments for mobile applications". Thesis, University of Ottawa (Canada), 2002. http://hdl.handle.net/10393/6367.

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Augmented Reality (AR) is a variation of Virtual Reality (VR). It allows the user to see computer generated virtual objects aligned with or superimposed upon objects in the real world through the use of some kind of see-through head-mounted display. Human users of such system can interact with the virtual world and perceive information, such as character descriptions of physical objects and instructions for performing physical tasks, in form of annotations, speech instructions, images and 3D models, from input devices such as screens, microphones, or haptic devices. This thesis describes our work of building a wireless collaborative augmented reality system, which supports vision-based tracking, video-based 3D graphics, and a keyboard interface over wearable computers to interact with virtual objects. Our goal is to have all the mobile users who work in the same real world space share the predefined virtual space and interact with the virtual world in real time. Multi-player Games in AR domain and Collaborative Conferences are two typical applications. One of the most critical requirements for augmented reality applications is to recognize and locate real world objects with respect to the person's head position and orientation. In this thesis, we propose a new technique for identifying real world objects. The method utilizes a Binary Square Marker, which can identify a great number of real world objects with markers tagged on them by using computer vision techniques. The marker is a link between the real world and the virtual world. It can be detected by a CCD camera attached to a mobile device. The marker works to determine the 3D position and orientation of the object with the marker tagged on it, as well as its unique ID number. Our technique is based on the observation that given four vertices of a square marker region, the coordinates of the projection of every point on the marker can be computed as a linear combination of the coordinates of the projections of four vertices under the assumption of affine transformation.

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22

Oliveira, Douglas Coelho Braga de. "Dynamic-object-aware simultaneous localization and mapping for augmented reality applications". Universidade Federal de Juiz de Fora (UFJF), 2018. https://repositorio.ufjf.br/jspui/handle/ufjf/8059.

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CAPES - Coordenação de Aperfeiçoamento de Pessoal de Nível Superior
Realidade Aumentada (RA) é uma tecnologia que permite combinar objetos virtuais tridimensionais com um ambiente predominantemente real, de forma a construir um novo ambiente onde os objetos reais e virtuais podem interagir uns com os outros em tempo real. Para fazer isso, é necessário encontrar a pose do observador (câmera, HMD, óculos inteligentes, etc.) em relação a um sistema de coordenadas global. Geralmente, algum objeto físico conhecido é usado para marcar o referencial para as projeções e para a posição do observador. O problema de Localização e Mapeamento Simultâneo (SLAM) se origina da comunidade de robótica como uma condição necessária para se construir robôs verdadeiramente autônomos, capazes de se auto localizarem em um ambiente desconhecido ao mesmo tempo que constroem um mapa da cena observada a partir de informações capturadas por um conjunto de sensores. A principal contribuição do SLAM para a RA é permitir aplicações em ambientes despreparados, ou seja, sem marcadores. No entanto, ao eliminar o marcador, perdemos o referencial para a projeção dos objetos virtuais e a principal fonte de interação entre os elementos reais e virtuais. Embora o mapa gerado possa ser processado a fim de encontrar uma estrutura conhecida, como um plano predominante, para usá-la como referencial, isso ainda não resolve a questão das interações. Na literatura recente, encontramos trabalhos que integram um sistema de reconhecimento de objetos ao SLAM e incorporam tais objetos ao mapa. Frequentemente, assume-se um mapa estático, devido às limitações das técnicas envolvidas, de modo que o objeto é usado apenas para fornecer informações semânticas sobre a cena. Neste trabalho, propomos um novo framework que permite estimar simultaneamente a posição da câmera e de objetos para cada quadro de vídeo em tempo real. Dessa forma, cada objeto é independente e pode se mover pelo mapa livremente, assim como nos métodos baseados em marcadores, mas mantendo as vantagens que o SLAM fornece. Implementamos a estrutura proposta sobre um sistema SLAM de última geração a fim de validar nossa proposta e demonstrar a potencial aplicação em Realidade Aumentada.
Augmented Reality (AR) is a technology that allows combining three-dimensional virtual objects with an environment predominantly real in a way to build a new environment where both real and virtual objects can interact with each other in real-time. To do this, it is required to nd the pose of the observer (camera, HMD, smart glasses etc) in relation to a global coordinate system. Commonly, some well known physical object, called marker, is used to de ne the referential for both virtual objects and the observer's position. The Simultaneous Localization and Mapping (SLAM) problem borns from robotics community as a way to build truly autonomous robots by allowing they to localize themselves while they build a map of the observed scene from the input data of their coupled sensors. SLAM-based Augmented Reality is an active and evolving research line. The main contribution of the SLAM to the AR is to allow applications on unprepared environments, i.e., without markers. However, by eliminating the marker object, we lose the referential for virtual object projection and the main source of interaction between real and virtual elements. Although the generated map can be processed in order to nd a known structure, e.g. a predominant plane, to use it as the referential system, this still not solve for interactions. In the recent literature, we can found works that integrate an object recognition system to the SLAM in a way the objects are incorporated into the map. The SLAM map is frequently assumed to be static, due to limitations on techniques involved, so that on these works the object is just used to provide semantic information about the scene. In this work, we propose a new framework that allows estimating simultaneously the camera and object positioning for each camera image in real time. In this way, each object is independent and can move through the map as well as in the marker-based methods but with the SLAM advantages kept. We develop our proposed framework over a stateof- the-art SLAM system in order to evaluate our proposal and demonstrate potentials application in Augmented Reality.

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23

Soto, Cecilia Irene. "A Pilot Study for Identifying Tasks and Degrees of Visual Fidelity for Applications of Head Mounted Display Systems for Construction". Thesis, Virginia Tech, 2017. http://hdl.handle.net/10919/78901.

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The rise in technology and reduced costs has led to more research on the use of Augmented Reality (AR). However, applications for AR Head Mounted Display (HMD) systems are still being defined. AR HMD systems have potential to help users interact and experience information in a way that could improve their performance. In the construction sector, workers use black and white construction level of detail drawings for assembly and inspection tasks. For this thesis, Microsoft HoloLens was used in an experiment to see the effects of AR models on user performance and comprehension. There were three conditions for this study, two of the conditions used AR model displays and the third condition used a traditional paper drawing of the model. This study measured participants' accuracy and comprehension of the model presented to them. The conclusion of this thesis is that using 3D AR models may improve participants' comprehension of construction drawings.
Master of Science

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24

Raska, Krystof, i Tobias Richter. "Influence of Augmented Reality on Purchase Intention : The IKEA Case". Thesis, Internationella Handelshögskolan, Högskolan i Jönköping, IHH, Företagsekonomi, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-36421.

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Augmented reality (AR) allows the enrichment of the physical world by adding virtual computer-generated digital information in real time to it (Furht, 2014). This provides marketers with previously unimagined options for reaching out and engaging with customers. Having the power to put the (virtual) products in the hand of customers, creates interesting opportunities for the users to engage with a brand, service or product (Yaoyuneyong et al., 2016). Although the AR market is expected to grow exponentially by the year 2020 (Digi-Capital, 2016) and several companies already tried to expand their business with the technology, little is known about whether AR is able to enrich the customers’ shopping behaviour and thus yield favourable outcomes such as increased product knowledge, positive attitudes and higher purchase intentions. This thesis quantitatively addresses the research gap with an experimental method to determine the causal effect of the IKEA AR application on these customer dimensions in comparison to a product experience on the website. Generation Y has been chosen as an appropriate sample to experimentally discover effects on shopping behaviour. Finally, the shopping-oriented AR application is perceived as highly enjoyable and useful, and further evoked higher purchase intentions than its website counterpart. Moreover, the attitude towards the product was not found to be a main driver, but the engaging experience and the conveyed unique product knowledge itself.

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25

Braun, Anne-Kathrin [Verfasser]. "Optimizing the user experience of mobile Augmented Reality applications / Anne-Kathrin Braun". München : Verlag Dr. Hut, 2012. http://d-nb.info/1028785003/34.

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26

SILVA, DJALMA LUCIO SOARES DA. "USING PLANAR STRUCTURES EXTRACTED FROM RGB-D IMAGES IN AUGMENTED REALITY APPLICATIONS". PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2016. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=28675@1.

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PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO
COORDENAÇÃO DE APERFEIÇOAMENTO DO PESSOAL DE ENSINO SUPERIOR
PROGRAMA DE EXCELENCIA ACADEMICA
Esta dissertação investiga o uso das estruturas planares extraídas de imagens RGB-Dem aplicações de Realidade Aumentada. Ter o modelo da cena é fundamental para as aplicações de realidade aumentada. O uso de imagens RGB-D auxilia bastante o processo da construção destes modelos, pois elas fornecem a geometria e os aspectos fotométricos da cena. Devido a grande parte das aplicações de realidade aumentada utilizarem superfícies planares como sua principal componente para projeção de objetos virtuais, é fundamental ter um método robusto e eficaz para obter e representar as estruturas que constituem estas superfícies planares. Neste trabalho, apresentaremos um método para identificar, segmentar e representar estruturas planares a partir de imagens RGB-D. Nossa representação das estruturas planares são polígonos bidimensionais triangulados, simplificados e texturizados, que estão no sistema de coordenadas do plano, onde os pontos destes polígonos definem as regiões deste plano. Demonstramos através de diversos experimentos e da implementação de uma aplicação de realidade aumentada, as técnicas e métodos utilizados para extrair as estruturas planares a partir das imagens RGB-D.
This dissertation investigates the use of planar geometric structures extracted from RGB-D images in Augmented Reality Applications. The model of a scene is essential for augmented reality applications. RGB-D images can greatly help the construction of these models because they provide geometric and photometric information about the scene. Planar structures are prevalent in many 3D scenes and, for this reason, augmented reality applications use planar surfaces as one of the main components for projection of virtual objects. Therefore, it is extremely important to have robust and efficient methods to acquire and represent the structures that compose these planar surfaces. In this work, we will present a method for identifying, targeting and representing planar structures from RGB-D images. Our planar structures representation is triangulated two-dimensional polygons, simplified and textured, forming a triangle mesh intrinsic to the plane that defines regions in this space corresponding to surface of objects in the 3D scene. We have demonstrated through various experiments and implementation of an augmented reality application, the techniques and methods used to extract the planar structures from the RGB-D images.

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27

Linder, Natan. "Rapid development, real-world deployment, and evaluation of projected augmented reality applications". Thesis, Massachusetts Institute of Technology, 2017. http://hdl.handle.net/1721.1/114074.

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Thesis: Ph. D., Massachusetts Institute of Technology, School of Architecture and Planning, Program in Media Arts and Sciences, 2017.
Cataloged from PDF version of thesis.
Includes bibliographical references (pages 235-260).
Current interactive projected augmented reality systems are not designed to support rapid development and deployment of applications beyond the confines of research labs. I developed a series of self-contained interactive projector-sensor systems (collectively LuminAR devices) and a web-based software development framework. The design goal of this research work was to advance the state of the art of projected AR interfaces and to explore how they can manifest in day-to-day objects. This novel, tightly integrated approach allows developers who are not versed in computer graphics, vision algorithms, and augmented reality techniques to implement projected AR applications rapidly. In this work, I review several real-world uses of the system for retail presentation, desktop interaction and collaboration applications, manufacturing, and education. The work is evaluated through extensive use of the hardware and software by developers as well as two user studies that specifically explored applications for manufacturing and education. The evaluation methodology focused both on basic interaction and system usability as well as the implications of using augmented interfaces in the specific application domains of education and manufacturing. I also discuss the results of the first large-scale user studies of projected augmented reality rapid application development. Finally, I provide a set of design principles for projected augmented reality applications, and recommendations concerning how to deploy such applications in the real world.
by Natan Linder.
Ph. D.

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28

Palm, Kajsa. "Design and use of 3D typography for indoor Augmented Reality mobile applications". Thesis, Umeå universitet, Institutionen för tillämpad fysik och elektronik, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-148619.

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Augmented Reality (AR), a concept where the real word is being enhanced with computer generated objects and text, has evolved and become a popular tool to communicate information through. Research on how the technique can be optimized regarding the technical aspects has been made, but not regarding how typography in three dimensions should be designed and used in AR applications. Therefore this master’s thesis investigates three different design attributes of typography in three dimensions. The three attributes are: typeface style, color, and weight including depth, and how they affect the visibility of the text in an indoor AR environment. A user study was conducted, both with regular users but also with users that were considered experts in the field of typography and design, to investigate differences of the visibility regarding the typography’s design attributes. The result shows noteworthy differences between two pairs of AR simulations containing different typography among the regular users. This along with a slight favoritism of bright colored text against dark colored text, even though no notable different could be seen regarding color alone. Discussions regarding the design attributes of the typography affect the legibility of the text, and what could have been done differently to achieve an even more conclusive result. To summarize this thesis, the objective resulted in design guidelines regarding typography for indoor mobile AR applications.

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29

Ingeson, Martin. "Long-Term Experience Applications for Augmented Reality - In a Medication Adherence Scenario". Thesis, Umeå universitet, Institutionen för datavetenskap, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-149702.

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The aim of this research project was to explore how long-term experience applications (LTEAs) can be designed and implemented for augmented reality (AR)-headsets. Personalization, unintrusiveness, planning (short-term and long-term) and context-awareness were identified as particularly important areas when designing and implementing LTEAs for AR-headsets. An intelligent system, called Medication Coach Intelligent Agent (MCIA), directed towards medication adherence was designed and an approach for designing LTEAs considering the above mentioned areas are presented. The goal of the MCIA was to increase medication adherence for patients in an intelligent way and the goal was achieved by using beliefs-desires-intentions (BDI)-based reasoning algorithms. A concept of intentions and actions is presented in order to be able to plan ahead while stile being adaptive to the situation of users. A proof-of-concept prototype was implemented in the setting of a Microsoft HoloLens and an evaluation with user tests was conducted.The purpose of the evaluation was to investigate user experience of usingAR-headsets and the potential for using AR-headsets as a tool to address problems related to medication adherence and for similar problems related to the behavior of users. The results showed that people with experience in use of smart technology were positive towards using AR-headsets and that it is possible to implement intelligent systems for AR-headsets using today’s technology.

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30

Janssen, Christina. "Consumer Acceptance of Mobile Augmented Reality Shopping Applications in Stationary Retail Trade". Thesis, Mittuniversitetet, Avdelningen för ekonomivetenskap och juridik, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:miun:diva-34171.

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Teixeira, João Marcelo Xavier Natário. "Analysis and evaluation of optimization techniques for tracking in augmented reality applications". Universidade Federal de Pernambuco, 2013. https://repositorio.ufpe.br/handle/123456789/12268.

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Real-time computer vision applications that run on the field and make frequent use of wearable computers have a critical restriction on the amount of processing they can perform, because of the fact that most (if not all) of the application runs on the wearable platform. A balancing scheme capable of allowing the application to use more processing power is fundamental both when input scenarios present more visual restrictions regarding, for example, the object to be tracked, and also to reduce processing in order to save battery and CPU time for other applications when the captured video is better controlled (more accessible). The fact that computer vision applications may run on a variety of platforms justifies the need for defining a model that automatically adjusts the tracker being used in applications with hard performance constraints. Performance degradation in wearable platforms can be greater than expected, as desktop and mobile platforms present different levels of hardware capabilities, and consequently, different performance restrictions. This doctoral thesis addresses the object tracking problem using a decision model, in such a way that prioritizes using the least computationally intensive algorithm whenever possible. It has the following specific objectives: to investigate and implement different tracking techniques, to choose/define a reference metric that can be used to detect image interference (occlusion, image noise, etc.), to propose a decision model that allows automatic switching of different trackers in order to balance the application's performance, and to reduce the application's workload without compromising tracking quality. The effectiveness of the system will be verified by synthetic case studies that comprise different object classes that can be tracked, focusing on augmented reality applications that can run on wearable platforms. Different tracking algorithms will be part of the proposed decision model. It will be shown that by switching among these algorithms, it is possible to reach a performance improvement of a factor of three, while keeping a minimum quality defined by a reprojection error of 10 pixels when compared to the use of only the best algorithm independent of its computational cost. This work results in better performance of applications with memory and battery restrictions.
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Made available in DSpace on 2015-03-12T19:02:48Z (GMT). No. of bitstreams: 2 Tese Joao Teixeira.pdf: 5813706 bytes, checksum: 85ed76e5022129077b181bca61f92678 (MD5) license_rdf: 1232 bytes, checksum: 66e71c371cc565284e70f40736c94386 (MD5) Previous issue date: 2013-03-01
CAPES e CNPq
Aplicações de visão computacional em tempo real executadas em campo fazem uso frequente de computadores vestíveis, os quais apresentam uma restrição crítica na quantidade de processamento que podem suportar, uma vez que a maior parte da aplicação (se não sua totalidade) deverá executar na plataforma vestível. É fundamental um esquema de balanceamento de carga capaz de permitir que a aplicação utilize mais poder de processamento quando os cenários de entrada apresentam mais restrições visuais, por exemplo, referentes ao objeto a ser rastreado, e diminua tal processamento com o objetivo de economizar bateria e tempo de CPU em aplicações quando o vídeo capturado é mais controlado (mais acessível). O fato de aplicações de visão computacional executarem em uma variedade de plataformas justifica se definir um modelo que ajuste automaticamente o rastreador em uso em aplicações com restrições de recursos computacionais. A degradação de desempenho em plataformas vestíveis pode ser maior do que a esperada, uma vez que plataformas desktop e móvel apresentam diferentes níveis de configurações de hardware, e consequentemente, diferentes restrições de desempenho. Esta tese de doutorado soluciona o problema do rastreamento de objetos usando um modelo de decisão, objetivando utilizar o algoritmo menos custoso sempre que possível. Como objetivos específicos têm-se: investigar e implementar diferentes técnicas de rastreamento, para escolher/definir uma métrica de referência que possa ser usada para detectar interferência na imagem (oclusão, ruído, etc.), propor um modelo de decisão que permita chaveamento automático entre diferentes rastreadores visando balancear o desempenho da aplicação baseado na métrica escolhida, e diminuir a quantidade de processamento requerida pela aplicação sem comprometer a qualidade do rastreamento envolvido. A eficiência do sistema será verificada através de estudos de caso sintéticos que compreendem diferentes classes de objetos que podem ser rastreados, focando em aplicações de realidade aumentada que executam em plataformas vestíveis. Diferentes algoritmos de rastreamento farão parte do modelo de decisão e através do chaveamento entre eles, será demonstrado que é possível atingir uma melhoria no desempenho de até três vezes, mantendo uma qualidade mínima definida como erro de reprojeção de até 10 pixels quando comparado à utilização apenas do algoritmo que gera a melhor qualidade de rastreamento, independente do seu custo computacional. O impacto desse trabalho implicará em uma melhor qualidade de aplicações com restrições de quantidade de memória, carga de baterias, entre outras.

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Chinthammit, Winyu. "Hybrid inertial-laser scanning head tracking system for cockpit applications /". Thesis, Connect to this title online; UW restricted, 2007. http://hdl.handle.net/1773/5972.

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Lönn, Caroline. "Augmented Reality Smartphone Applications as a Tool to Raise Awareness of Circular Economy". Thesis, KTH, Skolan för elektroteknik och datavetenskap (EECS), 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-260331.

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Environmental problems are increasingly jeopardizing the earth's life-support systems. By shifting from a take-make-dispose industrial model to a circular one, resources will last longer, and the environmental impact will be significantly lower. People’s choices, behaviours and lifestyles will play a vital role in achieving sustainable development. A way to influence this is to use an educational tool that is accessible, interesting and fun. By superimposing computer generated objects to the real world, Augmented Reality (AR) adds a layer of interactivity and engagement. As there are 3 billion active smartphone users worldwide, an AR smartphone application is also very accessible. This thesis investigates how marker-based AR can be used as a means to educate a user in circular economy. This was done by using research through design and applied research to create a design for a prototype which worked as a proof of concept. The prototype was evaluated through a heuristic evaluation. Data was gathered through a form and semi-structured interviews. The data was analysed using the framework method and box plots. The prototype used marker-based AR and was built using the game engine Unity with the Vuforia SDK. The results indicated that an AR application could be a good tool to use in combination with other sources of information such as seminars.
Miljöproblem äventyrar i allt större utsträckning jordens livsstödssystem. Genom att byta från en ta-skapa-kasta industriell modell till en cirkulär, kommer resurserna att räcka längre och miljöpåverkan blir betydligt lägre. Människors val, beteenden och livsstil kommer att spela en viktig roll för att uppnå en hållbar utveckling. Ett sätt att påverka detta är att använda ett pedagogiskt verktyg som är lättillgängligt, intressant och roligt. Genom att lägga till ett lager av virtuella objekt i den verkliga världen, tillför Augmented Reality (AR), interaktivitet och engagemang. Eftersom det finns 3 miljarder aktiva smarttelefonanvändare över hela världen, är en AR-smarttelefonapplikation också lättillgänglig. Denna avhandling undersöker hur markörbaserad AR kan användas för att utbilda en användare i cirkulär ekonomi. Detta gjordes genom att använda forskning genom design och tillämpad forskning för att designa en prototyp för konceptvalidering. Prototypen utvärderades genom en heuristisk utvärdering. Data samlades in genom ett formulär och halvstrukturerade intervjuer samt analyserades med hjälp av ramverks metoden och lådagram. Prototypen använde markörbaserad AR och byggdes med hjälp av spelmotorn Unity med Vuforia SDK. Resultaten visade att en AR-applikation skulle kunna vara ett bra verktyg att använda i kombination med andra informationskällor, som till exempel seminarier.

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Renius, Olle. "A Technical Evaluation of the WebXR Device API for Developing Augmented Reality Web Applications". Thesis, Linköpings universitet, Interaktiva och kognitiva system, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-157773.

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The aim of this project was to explore the WebXR Device API to find out the extent of its usefulness for creating augmented reality (AR) applications, as well as determine whether it is a valid platform independent alternative to the frameworks ARKit and ARCore. Exper- iments were conducted to measure its precision (the ability to persistently maintain virtual objects relative to the real world), its battery consumption and its frame rate stability. The results from the experiments are fairly positive, with the exception of some outliers among the precision and frame rate measurements. However, a number vital features are miss- ing from the API, and in its current state it only runs on Android in a specific version of Google Chrome. Thus, it is concluded that the API has potential, but it needs further de- velopment before it can be used commercially and be seen as a serious alternative to ARKit and ARCore.

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Nilsson, Susanna. "Augmentation in the Wild : User Centered Development and Evaluation of Augmented Reality Applications". Doctoral thesis, Linköpings universitet, CSELAB - Cognitive Systems Engineering Laboratory, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-54241.

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Augmented Reality (AR) technology has, despite many applications in the research domain, not made it to a widespread end user market. The one exception is AR applications for mobile phones. One of the main reasons for this development is technological constraints of the non-mobile phone based systems - the devices used are still neither mobile nor lightweight enough or simply not usable enough. This thesis addresses the latter issue by taking a holistic approach to the development and evaluation of AR applications for both single user and multiple user tasks. The main hypothesis is that in order for substantial wide spread use of AR technology, the applications must be developed with the aim to solve real world problems with the end user and goal in focus. Augmented Reality systems are information systems that merge real and virtual information with the purpose of aiding users in different tasks. An AR system is a general system much like a computer is general; it has potential as a tool for many different purposes in many different situations. The studies in this thesis describe user studies of two different types of AR applications targeting different user groups and different application areas. The first application, described and evaluated, is aimed at giving users instructions for use and assembly of different medical devices. The second application is a study where AR technology has been used as a tool for supporting collaboration between the rescue services, the police and military personnel in a crisis management scenario. Both applications were iteratively developed with end user representatives involved throughout the process and the results illustrate that users both in the context of medical care, and the emergency management domain, are positive towards AR systems as a technology and as a tool in their work related tasks. The main contributions of the thesis are not only the end results of the user studies, but also the methodology used in the studies of this relatively new type of technology. The studies have shown that involving real end users both in the design of the application and in the user task is important for the user experience of the system. Allowing for an iterative design process is also a key point. Although AR technology development is often driven by technological advances rather than user demands, there is room for a more user centered approach, for single user applications as well as for more dynamic and complex multiple user applications.

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Meshkat, Alsadat Shabnam. "Analysis of camera pose estimation using 2D scene features for augmented reality applications". Master's thesis, Université Laval, 2018. http://hdl.handle.net/20.500.11794/30281.

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La réalité augmentée (RA) a récemment eu un impact énorme sur les ingénieurs civils et les travailleurs de l'industrie de la construction, ainsi que sur leur interaction avec les plans ar-chitecturaux. La RA introduit une superposition du modèle 3D d'un bâtiment sur une image 2D non seulement comme une image globale, mais aussi potentiellement comme une repré-sentation complexe de ce qui va être construit et qui peut être visualisée par l'utilisateur. Pour insérer un modèle 3D, la caméra doit être localisée par rapport à son environnement. La lo-calisation de la caméra consiste à trouver les paramètres extérieurs de la caméra (i.e. sa po-sition et son orientation) par rapport à la scène observée et ses caractéristiques. Dans ce mémoire, des méthodes d'estimation de la pose de la caméra (position et orientation) par rapport à la scène utilisant des correspondances cercle-ellipse et lignes droites-lignes droites sont explorées. Les cercles et les lignes sont deux des caractéristiques géométriques qui sont principalement présentes dans les structures et les bâtiments. En fonction de la rela-tion entre les caractéristiques 3D et leurs images 2D correspondantes détectées dans l'image, la position et l'orientation de la caméra sont estimées.
Augmented reality (AR) had recently made a huge impact on field engineers and workers in construction industry, as well as the way they interact with architectural plans. AR brings in a superimposition of the 3D model of a building onto the 2D image not only as the big picture, but also as an intricate representation of what is going to be built. In order to insert a 3D model, the camera has to be localized regarding its surroundings. Camera localization con-sists of finding the exterior parameters (i.e. its position and orientation) of the camera with respect to the viewed scene and its characteristics. In this thesis, camera pose estimation methods using circle-ellipse and straight line corre-spondences has been investigated. Circles and lines are two of the geometrical features that are mostly present in structures and buildings. Based on the relationship between the 3D features and their corresponding 2D data detected in the image, the position and orientation of the camera is estimated.

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Piétu, Claire. "3D Virtual Reconstruction with Structured Light Techniquesand its Use in Augmented Reality Mobile Applications". Thesis, KTH, Tillämpad fysik, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-146189.

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Blom, Lillemor. "Impact of light on augmented reality : Evaluating how different light conditions affect the performance of Microsoft HoloLens 3D applications". Thesis, Linköpings universitet, Programvara och system, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-153468.

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Microsoft HoloLens is a headmounted augmented reality system providing users the ability to experience three-dimensional virtual content. This could be used in applications aimed at industry where users could use augmented reality to easily access information and receive instructions. For this to be suitable for industry, the system must be robust. One property of robustness was chosen for this thesis: system performance in conditions of different levels of light. A prototype implementing a use case for future industry was developed, as well as two additional smaller applications to facilitate experiments. Experiments were performed to investigate how different light levels affects the functionality in a 3D holographic application running on HoloLens and how the visibility of virtual content was affected in conditions with bright and heterogeneous backgrounds. The results showed that the functionality of the holographic application was not signiﬁcantly affected except in very dark conditions, and that bright and messy backgrounds pose a problem to hologram visibility.

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Ehmann, Markus Friedrich. "Developing a methodical approach for the systematic identification of innovative technological applications, based on mixed reality in manual order picking". Thesis, University of Plymouth, 2014. http://hdl.handle.net/10026.1/3027.

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The need to be economically successful is the key driver for companies to be innovative and implement new technologies with increasing efficiency and effectiveness. Uncertainty about whether to use new technologies and missing knowledge about their advantages lead to staggering and withholding from fast diffusion of innovations. Focusing on the industry of logistics and the technology Mixed Reality, this research project developed a methodical approach for evaluating the fitness of an innovative technology and a specific process of application. A mixed methods approach was derived, based on interviews and experiments. The main methodologies used, were semi-structured interviews with decision makers in logistics companies to elaborate triggering criteria in the investment process and laboratory experiments for the evaluation of competing technologies. These methods were framed by an initial field experiment and feedback interviews after the analysis for the validation of the approach. The research proved the competitively viable applicability of Mixed Reality and its specific strengths and weaknesses in manual order picking. This set the foundation for possible further development and implementation of the technology. The developed methodological approach proved to be a valid and reliable assessment of the intersection between a technology and specified process of application. This can greatly enhance the speed of implementing new innovations and gaining competitive advantages for companies.

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Schmid, Stephan [Verfasser], i Dieter [Akademischer Betreuer] Fritsch. "Semi-dense filter-based visual odometry for automotive augmented reality applications / Stephan Schmid ; Betreuer: Dieter Fritsch". Stuttgart : Universitätsbibliothek der Universität Stuttgart, 2019. http://d-nb.info/1194373070/34.

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Nóbrega, Rui Pedro da Silva. "Interactive acquisition of spatial information from images for multimedia applications". Doctoral thesis, Faculdade de Ciências e Tecnologia, 2013. http://hdl.handle.net/10362/11079.

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Dissertação para obtenção do Grau de Doutor em Informática
This dissertation addresses the problem of creating interactive mixed reality applications where virtual objects interact in a real world scenario. These scenarios are intended to be captured by the users with cameras. In other words, the goal is to produce applications where virtual objects are introduced in photographs taken by the users. This is relevant to create games and architectural and space planning applications that interact with visual elements in the images such as walls, floors and empty spaces. Introducing virtual objects in photographs or video sequences presents several challenges, such as the pose estimation and the visually correct interaction with the boundaries of such objects. Furthermore, the introduced virtual objects should be interactive and respond to the real physical environments. The proposed detection system is semi-automatic and thus depends partially on the user to obtain the elements it needs. This operation should be significantly simple to accommodate the needs of a non-expert user. The system analyzes a photo captured by the user and detects high-level features such as vanishing points, floor and scene orientation. Using these features it will be possible to create virtual mixed and augmented reality applications where the user takes one or more photos of a certain place and interactively introduces virtual objects or elements that blend with the picture in real time. This document discusses computer vision, computer graphics and human-computer interaction techniques required to acquire images and information about the scenario involving the user. To demonstrate the framework and the proposed solutions, several proof-of-concept projects are presented and studied. Additionally, to validate the solution several system tests are described and each case-study interface was subject of different user-studies.
Fundação para a Ciência e Tecnologia - research grant SFRH/BD/47511/2008

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Bishop, Richard. "Applications of Close-Range Terrestrial 3D Photogrammetry to Improve Safety in Underground Stone Mines". Thesis, Virginia Tech, 2020. http://hdl.handle.net/10919/98920.

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The underground limestone mining industry is a small, but growing segment of the U.S. crushed stone industry. However, its fatality rate has been amongst the highest of the mining sector in recent years due to ground control issues related to ground collapses. It is therefore important to improve the engineering design, monitoring and visualization of ground control by utilizing new technologies that can help an underground limestone company maintain a safe and productive operation. Photogrammetry and laser scanning are remote sensing technologies that are useful tools for collecting three-dimensional spatial data with high levels of precision for many types of mining applications. Due to the reality of budget constraints for many underground stone mining operations, this research concentrates on photogrammetry as a more accessible technology for the average operation. Despite the challenging lighting conditions and size of underground limestone mines that has previous hindered photogrammetric surveys in these environments, over 13,000 photographic images were taken over a 3-year period in active mines to compile these models. This research summarizes that work and highlights the many applications of terrestrial close-range photogrammetry, including practical methodologies for implementing the techniques in working operations to better visualize hazards and pragmatic approaches for geotechnical analysis, improved engineering design and monitoring.
M.S.
The underground limestone mining industry is a small, but growing segment of the U.S. crushed stone industry. However, its fatality rate has been amongst the highest of the mining sector in recent years due to ground control issues related to ground collapses. It is therefore important to improve the engineering design, monitoring and visualization of ground control by utilizing new technologies that can help maintain safe and productive underground stone operations. Photogrammetry and laser scanning are remote sensing technologies that are useful tools for collecting three-dimensional spatial data with high levels of precision for many different mining applications. Due to the reality of budget constraints for many mining operations, this research concentrates on photogrammetry as a more accessible technology for the average operation, despite the challenging lighting conditions and expansive size of underground limestone mines that has previous hindered photogrammetric surveys in these environments. This research focuses on the applications of photogrammetry in underground stone mines and practical methodologies for implementing the techniques in working operations to better visualize hazards for improved engineering design and infrastructure management.

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Putta, Advaith. "Implementation of Augmented Reality applications to recognize Automotive Vehicle using Microsoft HoloLens : Performance comparison of Vuforia 3-D recognition and QR-code recognition Microsoft HoloLens applications". Thesis, Blekinge Tekniska Högskola, Institutionen för datalogi och datorsystemteknik, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-17651.

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Context. Volvo Construction Equipment is planning to use Microsoft Hololens as a tool for the on-site manager to keep a track on the automotive machines and obtain their corresponding work information. For that, a miniature site has been build at PDRL BTH consisting of three diﬀerent automotive vehicles. We are developing Augmented Reality applications for Microsoft Hololens to recognize these automotive vehicles. There is a need to identify the most feasible recognition method that can be implemented using Microsoft Hololens. Objectives. In this study, we investigate which among the Vuforia 3-D recognition method and the feasible method is best suited for the Microsoft Hololens and we also ﬁnd out the maximum distance at which an automotive vehicle can be recognized by the Microsoft Hololens. Methods. In this study, we conducted a literature review and the number of articles has been reviewed for IEEE Xplore, ACM Digital Library, Google Scholar and Scopus sources. Seventeen articles were selected for review after reading their titles and abstracts of articles obtained from the search. Two experiments were performed to ﬁnd out the best recognition method of the Microsoft Hololens and the maximum distance at which an automotive vehicle can be recognized by the Microsoft Hololens. Results. QR-code recognition method is the best recognition method to be used by Microsoft Hololens for recognizing automotive vehicles in the range of one to two feet and Vuforia 3-D recognition method is recommended for more than two feet distance. Conclusions. We conclude that the QR-code recognition method is suitable for recognizing vehicles in the close range (1-2 feet) and Vuforia 3-D object recognition is suitable for recognition for distance over two feet. These two methods are diﬀerent from each other. One used the 3-D scan of the vehicle to recognize the vehicle and the other uses image recognition (using unique QR-codes). We covered eﬀect of distance on the recognition capability of the application and a lot of work has to be done in terms of how does the QR-code size eﬀects the maximum distance at which an automotive vehicle can be recognized. We conclude that there is a need for further experimentation in order to ﬁnd out the impact of QR-code size on the maximum recognition distance.

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Oriani, Mattia. "Applicazioni di Mixed Reality e Microsoft Hololens: studio e riprogettazione del concetto di ologramma e della relativa gestione all'interno di un'applicazione olografica". Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2016. http://amslaurea.unibo.it/11003/.

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La tesi presenta una panoramica sull'augmented, virtual e mixed reality, descrivendone le caratteristiche e le modalità di sviluppo. Come caso di studio viene analizzato il dispositivo Microsoft Hololens, descrivendone le caratteristiche concettuali, hardware e software. Per le applicazioni di questo dispositivo viene effettuata una riprogettazione della gestione e del concetto di ologramma all'interno di un'applicazione olografica, analizzandone i motivi e i vantaggi. E' fornita una overview sui dettagli implementativi della riprogettazione al fine di chiarire ogni aspetto dell'applicazione.

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Chouiten, Mehdi. "Architecture distribuée dédiée aux applications de Réalité Augmentée mobile". Phd thesis, Université d'Evry-Val d'Essonne, 2013. http://tel.archives-ouvertes.fr/tel-00903538.

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La réalité augmentée (RA) mobile consiste à faire coexister en temps-réel des mondes virtuel et réel. La mobilité est facilitée par l'utilisation de nouveaux dispositifs de types smartphones, et mini-PC embarquant un certain nombre de capteurs (visuels, inertiels,...). Ces dispositifs disposent toutefois d'une puissance de calcul limitée, qui peut s'avérer critique au vu des applications envisagées. L'une des solutions est de recourir à des mécanismes de distributions pour répartir les calculs sur un ensemble hétérogène de machines (serveurs ou autre terminaux mobiles). L'objectif de cette thèse est de concevoir une architecture logicielle dédiée à la réalité augmentée distribuée et plus particulièrement aux applications distribuées capable de fonctionner sur des réseaux ad-hoc constitués de terminaux hétérogènes déployées au travers d'un réseau dans un premier temps. Dans un deuxième temps, il conviendra de démontrer l'applicabilité de la solution proposée à des applications concrètes et d'explorer différentes possibilités d'exploitation originales de la distribution dans les applications de Réalité Augmentée en mettant l'accent sur la plus value apportée en terme de fonctionnalités ou d'opérations possibles en comparaison avec une solution de Réalité Augmentée classique (non distribuée) et en comparaison avec les performances des environnements dédiés à la RA existants offrant la possibilité de créer des applications distribuées.

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ERMACORA, GABRIELE. "Advances in Human Robot Interaction for Cloud Robotics applications". Doctoral thesis, Politecnico di Torino, 2016. http://hdl.handle.net/11583/2643059.

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In this thesis are analyzed different and innovative techniques for Human Robot Interaction. The focus of this thesis is on the interaction with flying robots. The first part is a preliminary description of the state of the art interactions techniques. Then the first project is Fly4SmartCity, where it is analyzed the interaction between humans (the citizen and the operator) and drones mediated by a cloud robotics platform. Then there is an application of the sliding autonomy paradigm and the analysis of different degrees of autonomy supported by a cloud robotics platform. The last part is dedicated to the most innovative technique for human-drone interaction in the User’s Flying Organizer project (UFO project). This project wants to develop a flying robot able to project information into the environment exploiting concepts of Spatial Augmented Reality

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McNutt, Andrew J. "Model Preparation and User Interface Aspects for Microsoft Hololens Medical Tutorial Applications". Wright State University / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=wright1503870652908252.

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Tummalapally, Subhadra. "Augment the Multi-Modal Interaction Capabilities of HoloLens Through Networked Sensory Devices". Wright State University / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=wright154756489614826.

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Silva, Fernando Oliveira da [UNESP]. "Utilização de dispositivos móveis e recursos de Realidade Aumentada nas aulas de Matemática para elucidação dos Sólidos de Platão". Universidade Estadual Paulista (UNESP), 2017. http://hdl.handle.net/11449/151423.

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As Tecnologias de Informação de Comunicação (TIC’s) estão presentes no cotidiano da humanidade e cada vez mais acessíveis no contexto escolar. O uso dessas tecnologias pode viabilizar uma educação matemática de qualidade propiciando a formação de cidadãos críticos e detentores de conhecimento matemático. Entretanto a educação promovida, principalmente pelas escolas públicas, não tem acompanhado os desenvolvimentos tecnológicos, fazendo que o ensino de matemática aconteça de forma dissociada do cotidiano vivenciado pelos alunos e ocasionando lacunas no aprendizado. O presente trabalho tem como objetivo analisar os aspectos relevantes do uso de Tecnologias de Informação e Comunicação no Ensino de Matemática, em especial o desenvolvimento e uso de aplicativos educacionais da área de matemática baseados em dispositivos móveis com a utilização de recursos de Realidade Aumentada. Com um do mapeamento sistemático foram identificados os principais trabalhos de pesquisa, tecnologias e aplicativos utilizados na área, e os resultados obtidos serviram como requisitos para o desenvolvimento do aplicativo ARSolids, que aborda conteúdos de Geometria, através dos sólidos de Platão e suas particularidades, utilizando recursos de Realidade Aumentada. Um experimento foi elaborado com o propósito de identificar e analisar a pré-disposição de docentes em utilizar TIC’s nas aulas de matemática, como também a interação e satisfação do uso do aplicativo ARSolids por alunos e docentes. Com a análise dos resultados constatou-se que os alunos obtiveram resultado satisfatório utilizando o aplicativo, com uma média de acertos de 82%. Ressaltando-se que havia maior complexidade dos objetos apresentados nos testes utilizando o ARSolids. A maioria dos entrevistados considera relevante, em relação ao método de ensino tradicional, o uso deste tipo de tecnologia na sala de aula para a abordagem de conteúdos de matemática.
Communication Information Technologies (ICTs) are present in the daily lives of humanity and increasingly accessible in the school context. The use of these technologies can enable a quality mathematical education by providing training for critical citizens and holders of mathematical knowledge. However, the education promoted, mainly by the public schools, has not accompanied the technological developments, making the teaching of mathematics happen in a way dissociated from the daily life experienced by the students and causing learning gaps. The present work has the objective of analyzing the relevant aspects of the use of Information and Communication Technologies in Mathematics Teaching, especially the development and use of educational applications in the field of mathematics based on mobile devices with the use of Augmented Reality resources. With one of the systematic mapping, the main research works, technologies and applications used in the area were identified, and the results obtained served as requirements for the development of the ARSolids application, which deals with Geometry contents, through Plato's solids and their particularities, using Augmented Reality features. An experiment was developed with the purpose of identifying and analyzing the pre-disposition of teachers in using ICTs in mathematics classes, as well as the interaction and satisfaction of the use of the ARSolids application by students and teachers. With the analysis of the results, it was found that the students obtained a satisfactory result using the application, with a mean of 82%. It was emphasized that there was greater complexity of the objects presented in the tests using ARSolids. Most of the interviewees consider the use of this type of technology in the classroom to approach mathematics content relevant to the traditional teaching method.

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Antigny, Nicolas. "Estimation continue de la pose d'un équipement tenu en main par fusion des données visio-inertielles pour les applications de navigation piétonne en milieux urbains". Thesis, Ecole centrale de Nantes, 2018. http://www.theses.fr/2018ECDN0027/document.

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Pour assister la navigation piétonne dans les espaces urbains et intérieurs, une estimation précise de la pose (i.e. la position 3D et l'orientation3D) d'un équipement tenu en main constitue un point essentiel dans le développement d'outils d'aide à la mobilité (e.g. applications de réalité augmentée). Dans l'hypothèse où le piéton n'est équipé que d'appareils grand public, l'estimation de la pose est limitée à l'utilisation de capteurs à faible coût intégrés dans ces derniers (i.e. un récepteur GNSS, une unité de mesure inertielle et magnétique et une caméra monoculaire). De plus, les espaces urbains et intérieurs, comprenant des bâtiments proches et des éléments ferromagnétiques, constituent des zones difficiles pour la localisation et l'estimation de la pose lors de grands déplacements piétons.Cependant, le développement récent et la mise à disposition d'informations contenues dans des Systèmes d'Information Géographiques 3D constituent une nouvelle source de données exploitable pour la localisation et l'estimation de la pose. Pour relever ces défis, cette thèse propose différentes solutions pour améliorer la localisation et l'estimation de la pose des équipements tenus en main par le piéton lors de ses déplacements en espaces urbains et intérieurs. Les solutions proposées intègrent l'estimation de l'attitude basée inertielle et magnétique, l'odométrie visuelle monoculaire mise à l'échelle grâce à l'estimation des déplacements du piéton, l'estimation absolue de la pose basée sur la reconnaissance d'objets SIG 3D parfaitement connus et la mise à jour en position de la navigation à l'estime du piéton.Toutes ces solutions s'intègrent dans un processus de fusion permettant d'améliorer la précision de la localisation et d'estimer en continu une pose qualifiée de l'appareil tenu en main.Cette qualification est nécessaire à la mise en place d'un affichage en réalité augmentée sur site. Pour évaluer les solutions proposées, des données expérimentales ont été recueillies au cours de déplacements piétons dans un espace urbain avec des objets de référence et des passages intérieurs
To support pedestrian navigation in urban and indoor spaces, an accurate pose estimate (i.e. 3Dposition and 3D orientation) of an equipment held inhand constitutes an essential point in the development of mobility assistance tools (e.g.Augmented Reality applications). On the assumption that the pedestrian is only equipped with general public devices, the pose estimation is restricted to the use of low-cost sensors embedded in the latter (i.e. an Inertial and Magnetic Measurement Unit and a monocular camera). In addition, urban and indoor spaces, comprising closely-spaced buildings and ferromagnetic elements,constitute challenging areas for localization and sensor pose estimation during large pedestrian displacements.However, the recent development and provision of data contained in 3D Geographical Information System constitutes a new wealth of data usable for localization and pose estimation.To address these challenges, this thesis proposes solutions to improve pedestrian localization and hand-held device pose estimation in urban and indoor spaces. The proposed solutions integrate inertial and magnetic-based attitude estimation, monocular Visual Odometry with pedestrian motion estimation for scale estimation, 3D GIS known object recognition-based absolute pose estimation and Pedestrian Dead-Reckoning updates. All these solutions are fused to improve accuracy and to continuously estimate a qualified pose of the handheld device. This qualification is required tovalidate an on-site augmented reality display. To assess the proposed solutions, experimental data has been collected during pedestrian walks in an urban space with sparse known objects and indoors passages

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