Dissertations / Theses on the topic '3D'
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JOHANSSON, ANNA. "3D-2D-3D." Thesis, Högskolan i Borås, Institutionen Textilhögskolan, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:hb:diva-18108.
Full textProgram: Modedesignutbildningen
Bergman, Jens, and Fredrik Wallin. "3D-portal : Kommunikation i 3D." Thesis, Mittuniversitetet, Avdelningen för informations- och kommunikationssystem, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:miun:diva-22255.
Full textIn todays society internet is used for communication between each other aroundthe world. The first video call was made around the year 1940 and it is time fora development, where 3D is something that can make video calls more real. Tomake this possible a system was constructed that would be able to get data fromdifferent time-of-flight cameras and color cameras and audio devices. That datashould later on be compressed and transmitted over internet to be able to play iton someone else’s 3D-display. To prevent the feeling of delay in the call, allparts together must happen in real time. The development methods that havebeen used is pair programming and a variation of test-driven development. Thesystem has been evaluated by time messurements, image quality and data sizeto find a good balance between time and quality. The system was constructedby five parts: capturing of images and audio, image upscaling, compression anddecompression, network streaming and also rendering. The result showed thatthe parts affected by data size and image quality could achieve a good balancebetween time and quality. However, all goals could not be achieved becausesome parts where too slow for the real time goal to be achieved and also someparts could not be constructed in time. Since the system was built up modularlythe parts that did not achieve the goals can be improved or replaced. Based onthe results, solution proposals was made to improve the results for a possiblefurther development.
Kratochvíla, Michael. "Korekce barev 3D scanneru a 3D tiskárny." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2019. http://www.nusl.cz/ntk/nusl-401952.
Full textКотенко, А. В. "Spheree-перший крок до технологій майбутнього." Thesis, Сумський державний університет, 2014. http://essuir.sumdu.edu.ua/handle/123456789/38776.
Full textKarásek, Miroslav. "Zpracování a vizualizace stereo snímků." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2012. http://www.nusl.cz/ntk/nusl-219673.
Full textKarlsson, Tobias. "Kroppsspråk i 3d-animation : Lögner hos 3d-karaktärer." Thesis, Högskolan i Skövde, Institutionen för kommunikation och information, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:his:diva-5022.
Full textMurali, Ram Subramanian. "Pose Estimation and 3D Reconstruction for 3D Dispensing." Thesis, KTH, Skolan för elektroteknik och datavetenskap (EECS), 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-288533.
Full textDispensering av vätskor är en viktig del av många industriella tillämpningar, som 3D-skrivare och ytmontering. I en majoritet av dessa tillämpningar idag sker dispenseringen på platta, två-dimensionella ytor (eller substrat). I framtiden kommer dispensering i ökad omfattning ske på godtyckliga tredimensionella objekt, varför positionen av dispenseringshuvudet relativt hela det tre-dimensionella substratet kommer att krävas. Behovet driver på möjligheten att använda vision-baserade, fem- eller sex-axliga robotmanipulatorer, istället för befintliga lösningar med hårdkodade rumsbeskrivningar av ett objekt som dispenseringshuvudet ska följa. Given en tre-dimensionell kropp, en CAD-beskrivning av densamme och en bana på kroppen som ska följas av ett dispenseringshuvud syftar denna avhandling till att svara på följande industriella problem: Hur anpassas dispenseringsbanan om kroppen förskjuts från CAD-modellens position? Det viktigaste kravet för tillämpningen är hög volymsnoggrannhet på den nedlagda volymen som kräver hög positioneringsnoggrannhet, ned till 100 um med avseende på den tänkta CAD-definierade dispenseringsbanan. Den hög positioneringsnoggrannheten på dispenseringshuvudet garanterar även god positioneringsnoggrannhet på den dispenserade vätskan på substratet. För att uppnå hög doseringsnoggrannhet krävs robust volymetrisk skanning (3D-rekonstruktion) av objektet som liknar CADmodellen och robotmanipulator med hög noggrannhet. Arbetet i denna avhandling är begränsad till den tre-dimensionella rekonstruktionen och justering av dispenseringsbanan baserat på en ändring av objektets position. Andra tillämpningsspecifikationer är låg total takttid och låg utrustningskostnad. Avhandling syftar till att: i) undersöka olika typer av markörbaserade 3Dpositioneringsuppskattningar med en billig RGBD konsumentkamera ii) generera en 3D-rekonstruktion av objektet för alla typer av poseuppskattningar och iii) hitta objektets positioneringsförskjutning från CAD-modellens. Schackbräda och ArUco-markörer används som fiducialmarkörer. Olika typer av poseuppskattningar som utnyttjar RGB or RGB-D-kombinerade tekniker används. Truncated Signed Distance Function (TSDF) används för ytrekonstruktion. Iterative Closest Point (ICP) används för att hitta pose-justering mellan CADbeskrivningen och rekonstruktionen. Tester utförs för olika objektformer i olika positioner och riktningar. Därefter utvärderas rekonstruktionen, noggrannheten i justeringen av dispenseringsbanan, samt takttiden.
Ohlsson, Jonathan, and Max Englund. "Detaljnivåer inom 3D-modellering : Abstraktion av 3d-karaktärer." Thesis, Högskolan i Skövde, Institutionen för informationsteknologi, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:his:diva-19942.
Full textKarlsson, Lars. "Förslag till 3D-strategi för Skövde kommun." Thesis, Karlstad University, Faculty of Social and Life Sciences, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-2149.
Full textAtt vilja lagra sina geografiska data i tre dimensioner har börjat bli allt vanligare bland de svenska kommunerna. Man vill utifrån dessa data skapa en 3D-modell över sina tätorter med realistiska byggnader och andra objekt. Detta ger ökade möjligheter inom planprocesser, bygglov, skuggstudier och andra kommunala ändamål för invånarna.Detta examensarbete hade till syfte att ta fram ett förslag till 3D-strategi för Skövde kommun. De har idag sina data lagrade i två dimensioner i en Oracle-databas och man har en del andra material som till exempel punktmoln från laserskanning som skulle kunna användas för att skapa en geografisk databas i tre dimensioner.Examensarbetet tar upp olika mjukvaror man kan använda för skapandet och användandet av 3D-modeller. Den tar även upp vilka standarder man kan använda för att lagra geografiska data i tre dimensioner och vilka databaser man kan använda för detta ändamål. Dessutom berörs hur man skulle kunna ajourföra data och hur långt några andra kommuner har kommit i deras arbete med en 3D-strategi.Som slutsats så ser man att det det är svårt att hitta information inom området. Men att det finns mycket information att hämta från andra kommuner som redan gjort en hel del arbete. Ett bra exempel är Göteborg som tagit fram en riktigt fin modell som man kan se som en förebild. Man kan också se att Oracle och CityGML är en bra lösning för lagring av data i 3D. Det finns också företag som tagit fram lösningar för skapandet av kompletta 3D-lösningar efter en automatisk process men att de kan behöva utvecklas mer för att användas i dessa ändamål.
Swedish municipalities increasingly want to store their spatial data in three dimensions. On the basis of these data they want to create a 3D model of their cities with realistic buildings and other items. This provides increased opportunities in planning, building applications, studies of shadows and other municipal purposes for the residents.The purpose of this degree project was to develop a proposal for a 3D strategy for Skövde municipality. For the moment they have their data stored in two dimensions in an Oracle database and they have a number of other materials such as point clouds from laser scanning that could be used to create a spatial database in three dimensions.The degree project points to various software that can be used for the creation and use of 3D models. It also shows standards that can be used for storing of spatial data in three dimensions and which databases can be used for this purpose. Furthermore the study deals with how the model can be updated and how far other municipalities have advanced in their work with 3D strategies.As a conclusion, we can notice that it is difficult to find information in this area. But there are a lot of information to require from other municipalities that already has done a lot of work. A great example is Göteborg who have created a really nice model that can be seen as a paragon. You can also see that Oracle and CityGML is a good solution for storage of data in 3D. There are also companies that have developed solutions for the creation of complete 3D solutions trough an automatic process but that they need to develop it more for making it able to use for this purposes.
Matyskiewicz, Jiří. "3D simulační toolbox." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2011. http://www.nusl.cz/ntk/nusl-218941.
Full textHåkansson, Filip. "3D PDF." Thesis, Jönköping University, JTH, Civil Engineering, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-1341.
Full textThis report is about Adobe Acrobat 3D and their new PDF format witch can contain 3 dimensional models that are interactive. The purpose is to find out if the program and the format work in a level that is suitable for the market. To create this PDF you need Acrobat 3D installed on your computer but it only needs Acrobat Reader 7 or 8 to open it, and the Reader is free to download on the internet.
The examination is focusing on four formats: U3D, 3DS, DWG and DXF because they are the most common in the building industry seen from the architects’ way. From a 3D model exported to these four formats they where converted to PDF in different settings to be compared in different points as information and size of the files. The result where put together in tables for an easy overview.
During the work there were no big differences between the results from the different settings noticed. The differences depended more from which format the PDF where converted from. Then the program is not that old on the market there are still some things that can be improved.
Panchenko, O. O., and E. O. Gumennyy. "3D printing." Thesis, Сумський державний університет, 2014. http://essuir.sumdu.edu.ua/handle/123456789/35039.
Full textЗолотова, Світлана Григорівна, Светлана Григорьевна Золотова, Svitlana Hryhorivna Zolotova, and T. M. Shabelnyk. "3D gaming." Thesis, Вид-во СумДУ, 2011. http://essuir.sumdu.edu.ua/handle/123456789/22501.
Full textБібік, В. І. "3D-принтер." Thesis, Сумський державний університет, 2013. http://essuir.sumdu.edu.ua/handle/123456789/41084.
Full textБевза, Ірина Олегівна. "3D-сканер." Bachelor's thesis, КПІ ім. Ігоря Сікорського, 2019. https://ela.kpi.ua/handle/123456789/28937.
Full textIn thіі thesis the review of scientific and technical literature on contact and non-contact 3D scanners is presented. The prospects of using such devices for human needs (design, construction, archeology, medicine, etc.) are shown. The main types of lasers that can be used in range measurements are analyzed. The technology of manufacturing laser diodes is described. An overview of the parameters, characteristics and technologies of digital cameras is made. The structural and optical diagrams of a 3D scanner are described. The method of constructing a matrix model of 3D-scanner surface is developed. The design of the scanner, its structural and optical circuits is developed. The 3D scanner can provide the following options: • depth of the scene is 03-1,0 m; • the accuracy of measuring the distance to the points of the surface of the object is not worse than 0,5 mm; • Resolution is not worse than 0.5 mm; • Scan range 360°; • Time to construct a matrix 3D object model for no more than 5 minutes.
Langr, Petr. "3D autoškola." Master's thesis, Vysoké učení technické v Brně. Fakulta informačních technologií, 2015. http://www.nusl.cz/ntk/nusl-234940.
Full textŘeháček, Prokop. "3D Autoškola." Master's thesis, Vysoké učení technické v Brně. Fakulta informačních technologií, 2014. http://www.nusl.cz/ntk/nusl-236061.
Full textPernica, Lukáš. "3D Autoškola." Master's thesis, Vysoké učení technické v Brně. Fakulta informačních technologií, 2009. http://www.nusl.cz/ntk/nusl-236792.
Full textMelcer, Pavel. "3D Autoškola." Master's thesis, Vysoké učení technické v Brně. Fakulta informačních technologií, 2019. http://www.nusl.cz/ntk/nusl-412569.
Full textRastau, Vlad. "Something 3D." Thesis, Uppsala universitet, Observationell astrofysik, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-410097.
Full textRopelatto, Luciane. "Prototipagem 3D." reponame:Repositório Institucional da UFSC, 2015. https://repositorio.ufsc.br/xmlui/handle/123456789/160574.
Full textMade available in DSpace on 2016-04-15T13:17:25Z (GMT). No. of bitstreams: 1 337787.pdf: 6882829 bytes, checksum: 0c306ae8c89ef73383c6c79d6987668e (MD5) Previous issue date: 2015
A presente dissertação trata da pesquisa em torno da investigação e do registro do processo de produção e animação de um protótipo virtual de em 3D, visando desenvolver um traje inspirado no século XVII. Usou-se conhecimentos de design para propor uma representação com características realísticas do comportamento de um tecido, considerando as restrições de produção do objeto da época e com vista a dar maior credibilidade a essa representação ? justificada pela busca, na atualidade, de resultados digitais e virtuais que sejam fidedignos ao artefato real. Realizou-se uma pesquisa de natureza aplicada, de abordagem qualitativa, de ordem exploratória e descritiva. Como fundamentação do estudo, foram abordados tópicos referentes à história da indumentária no século XVII; à percepção visual da imagem; à prototipagem virtual em 3D e as tecnologias utilizadas no processo de animação; ao tecido e sua simulação no ambiente virtual. O referencial teórico embasou o processo adotado para construir o traje virtual e, ainda, a partir dos dados coletados, resultaram-se experimentações com tecidos e uma prototipagem real das roupas. Estas, por sua vez, serviram de referência visual para a observação do caimento e do movimento do tecido. Considerando tempo de execução, a habilidade técnica, a qualidade final dentro das possibilidades de representação visual fiel ao artefato real, foram escolhidos softwares compatíveis e apropriadas para o desenvolvimento virtual do traje. Após resultado positivo frente aplicação de uma pesquisa de satisfação, onde se considerou os atributos estético-formais do traje virtual em relação ao real, constatou-se que se alcançou uma percepção visual adequadamente realística da roupa com o objeto em movimento, validando o protótipo virtual e, especialmente, o processo para o seu desenvolvimento.
Abstract : This dissertation deals with the research on the investigation and record of the production process and animation of a virtual prototype of a 3D costume, in order to develop a costume inspired in the seventeenth century. Knowledge on design was used to propose a representation with realistic features of the performance of a tissue, considering the production constraints of the object of the time being in order to give greater credibility to such representation - justified by the pursuit, nowadays, of digital and virtual results that are reliable in accordance to the real artifact. To do so an applied research was carried out, with qualitative approach, of an exploratory and descriptive order. In support of the study topics related to the history of clothing in the seventeenth century were approached, as well as the visual perception of the image; the virtual 3D prototyping and the technologies used in the animation process; the tissue and its simulation in virtual environment. The theoretical framework used to ground the process adopted to build virtual costume and also the collected data led to experimentation with fabrics and a real prototype of the clothes. These, in turn, serve as a visual reference for observing the fabric trim and movement. Considering runtime, the technical skill, the final quality within the possibilities of visual representation faithful to the real artifact, consistent and appropriate software for virtual development costume were chosen. After positive result in connection to the application of a satisfaction survey, where the aesthetic-formal attributes of the virtual costume related to the real one was considered, it was found that adequately realistic visual perception of the clothes with the object in movement was reached, validating the virtual prototype and especially the process for its development.
Ctibor, Jiří. "3D tiskárna." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2016. http://www.nusl.cz/ntk/nusl-242004.
Full textMuñoz, Álvaro Aranda. "Comparing 3D interfaces of virtual factories : an iconic 3D interface against an abstract 3D visualisation." Thesis, Blekinge Tekniska Högskola, Institutionen för datalogi och datorsystemteknik, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-4115.
Full textThis thesis explores and compares two prototypes that present a visualisation of the process state of a factory. The first prototype presents a generic interface in which primitive 3D shapes convey the information of the factory status. The second prototype is complemented with specific and iconic 3D models of the factory that help the users associating the conveyed information to the factory flow. The motivation behind this dissertation is that the type of generic interface presented can lead to more reusable interfaces in the future.
Sun, Jing. "The Integration of 3D Geodata and BIM Data in 3D City Models and 3D Cadastre." Licentiate thesis, KTH, Geodesi och satellitpositionering, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-262845.
Full textDet ursprungliga geografiska informationssystemet (GIS) och byggnadsinformationsmodellering (BIM) är utformade och utvecklade oberoende av varandra för att tjäna olika syften och användning. Inom 3D-teknik kan både 3D geodata och BIM-data specificera semantiska data och modellera 3D-byggnader som är framträdande för 3D stadsmodeller och 3D fastighetsregister. 3D-geodata kan samlas in från geodetiska mätningsmetoder som totalstation, laserskanning och fotogrammetri och de kan generera 3D modeller av byggnader i CityGML för makroanalys av städer. BIM-data har betydande fördelar i planering, design, modellering och hantering av byggnadsinformation eftersom det innehåller detaljerade uppgifter om byggelement. Dessutom gör BIM det möjligt att förmedla och analysera komplex information över byggnaders livscykel. Integrationen av BIM- och 3D-stadsmodeller är viktigt för att kunna analysera både byggnader och stad, exempelvis i stadsplanering, byggnadskonstruktion och hållbarhetsanalys.Denna avhandling är en sammanfattning och sammanställning av två artiklar, varav den ena är publicerad i Journal of Spatial Science, och den andra är under granskning i ISPRS International Journal of Geo-Information. Den första artikeln utformade och implementerade en metod för att formalisera integrationen av BIM-data i stadsmodeller (CityGML-modeller) som genererades från BIM-data och flygburen laserskanning/fotavtryck baserat på gemensamma modelleringsriktlinjerna. De geometriska resultaten av CityGML modellerna jämfördes och utvärderades visuellt och kvantitativt. Den andra artikeln föreslog en allmän ram för att dela och integrera fastighets information med BIM och 3D GIS tillsammans med allmänna krav. Baserat på kraven och ramverket så visade en fallstudie på hur man kan representera och visualisera 3D fastighetsgränser juridiskt och tekniskt genom att integrera BIM på byggnadsnivå och CityGML på stadsnivå. Både IFC-modellen och CityGML-modellen kopplades till LADM på konceptuell nivå med hjälp av UML-modeller och på databasnivå.Slutsatserna från den första artikeln inkluderar undersökning av BIM data som en kvalificerad källa på de geometriska aspekterna för att uppfylla behovet av en snabbare uppdateringsprocess av 3D-stadsmodeller, och den andra uppsatsen visar att det föreslagna ramverket och kraven presterar väl för att generera 3D fastighets modeller i den verkliga världen.
QC 20191023
Ponomarenko, V. S. "Creat your own 3D life." Thesis, Sumy State University, 2018. http://essuir.sumdu.edu.ua/handle/123456789/66824.
Full textMullick, Rakesh. "Automatic orientation determination of 3D objects from 3D data." Diss., Georgia Institute of Technology, 1994. http://hdl.handle.net/1853/13877.
Full textHerfort, Benjamin, Marcel Kaibel, and Bernhard Höfle. "3D-MAPP: 3D-MicroMapping von großen Geodatensätzen im Web." Rhombos-Verlag, 2017. https://slub.qucosa.de/id/qucosa%3A21275.
Full textLanterne, Célestin. "Réparation et optimisation de maillages 3D pour l'impression 3D." Thesis, Bordeaux, 2019. http://www.theses.fr/2019BORD0454.
Full text3D printers use 3D models in the form of meshes to define the geometry and the appearance of objects to be printed. A 3D mesh must have some topological properties so that the geometry it represents could be printable and the geometry itself must respect certain conditions to be printable. These properties and conditions may vary depending on the 3D printing technologies in use.Many 3D meshes used for printing were not initially designed for this purpose application. The main primary use of these meshes is visualization, which does not require the same topological properties and geometric conditions. The subject of this thesis is the repair of these meshes to make them printable.A repair chain including several steps was designed for this purpose. Non-manifold conditions are repaired by extracting related components (surfaces). The boundaries of surfaces are detected and classified according to the best repair to be applied on each. The boundaries of surfaces are repaired according to their classification either by a filling method or by an offset method. The weakness of the geometry is detected and controlled
Keil, Christiane, Dominik Haim, Ines Zeidler-Rentzsch, Franz Tritschel, Bernhard Weiland, Olaf Müller, Thomas Treichel, and Günter Lauer. "3D-volldigitalisierte Behandlungsplanung bei Lippen-Kiefer-Gaumenspalten (LKGS-3D)." Thelem Universitätsverlag & Buchhandlung GmbH & Co. KG, 2021. https://tud.qucosa.de/id/qucosa%3A75877.
Full textLi, Peiyi. "Exploration of 3D Images to Understand 3D Real World." Diss., Temple University Libraries, 2016. http://cdm16002.contentdm.oclc.org/cdm/ref/collection/p245801coll10/id/413481.
Full textPh.D.
Our world is composed of 3-dimension objects. Every one of us is living in a world with X, Y and Z axis. Even though the way we record our world is usually taking a photo: reduce dimensionality from 3-dimension to 2-dimension, the most natural and vivid way to understand the world, and to interact with it, is to sense from our 3D real world. We human beings are sensoring our 3D real world everyday using our build-in stereo system: two eyes. In another word, the raw source data human beings obtain to recognize the real 3D world has depth information. It is not difficult to figure out: Will it help if we give machines depth map of a scene during understanding the 3D real world using computer vision technologies? The answer is yes. Following this concept, my research work is focused on 3D topics in Computer Vision. 3-dimension world is the most intuitive and vivid world human beings can perceive. In the past, it is very costly to get 3D raw source data. However, things have changed since the release of many 3D sensors in recent decades. With the help of many modern 3D sensor, I am motivated to choose my research topics among this direction. Nowadays, 3D sensor has been used in various aspects of industries. In gaming industry, we have many kinds of commercial in-door 3D sensors. This kind of sensors can generate 3D cloud points in in-door environment with very cheap cost. Thus, provides depth information to traditional computer vision algorithms, and achieves state-of-the-art detection results of human body skeleton. 3D sensor in gaming brings out new ways to interact with computers. In medical industry, engineers offer cone beam computed tomography (CBCT). The raw source data this technology provides gives doctors the idea of holographic structure of target soft/hard tissue. By extend pattern recognition algorithms from 2D to 3D, computer vision scientists can now suggest doctors with 3D texture feature, and help them when diagnose. My research works are along these two lines. In medical image, by looking into trabecular bone 3D structures, I want to use Computer Vision tools to interpret the most tiny density change. In human-computer-interaction task, by studying the 3D point cloud, I want to find a way to estimate human hand pose. First of all, in Medical Image, by using Computer Vision methods, I want to find out a useful algorithm to distinguish bone texture patterns. This task is critical in clinical diagnosis. Variations in trabecular bone texture are known to be correlated with bone diseases, such as osteoporosis. In my research work, we propose a multi-feature multi-ROI (MFMR) approach for analyzing trabecular patterns inside the oral cavity using cone beam computed tomography (CBCT) volumes. For each dental CBCT volume, a set of features including fractal dimension, multi-fractal spectrum and gradient based features are extracted from eight regions-of-interest (ROI) to address the low image quality of trabecular patterns. Then, we use generalized multi-kernel learning (GMKL) to effectively fuse these features for distinguishing trabecular patterns from different groups. To validate the proposed method, we apply it to distinguish trabecular patterns from different gender-age groups. On a dataset containing dental CBCT volumes from 96 subjects, divided into gender-age subgroups, our approach achieves 96.1\% average classification rate, which greatly outperforms approaches without the feature fusion. Besides, in human-computer-interaction task, the most natural way is to use your hand pointing things, or use a gesture to express your ideas. I am motivated to estimate all skeleton joint locations in 3D space, which is the foundation of all gesture understanding. Through logical decision on these skeleton join locations, we can obtain the Semantics behind the hand pose gesture. So, the task is to estimate a hand pose in 3D space, locating all skeletal joints. A real-time 3D hand pose estimation algorithm is then proposed using the randomized decision forest framework. The algorithm takes a depth image as input and generates a set of skeletal joints as output. Previous decision-forest-based methods often give labels to all points in a point cloud at a very early stage and vote for the joint locations. By contrast, this algorithm only tracks a set of more flexible virtual landmark points, named segmentation index points (SIPs), before reaching the final decision at a leaf node. Roughly speaking, an SIP represents the centroid of a subset of skeletal joints, which are to be located at the leaves of the branch expanded from the SIP. Inspired by a latent regression-forest-based hand pose estimation framework, we integrate SIP into the framework with several important improvements. The experimental results on public benchmark datasets show clearly the advantage of the proposed algorithm over previous state-of-the-art methods, and the algorithm runs at 55.5 fps on a normal CPU without parallelism. After the study on RGBD (RGB-depth) images, we have come to another issue. When we want to take advantage of our algorithms, and make an application, we find it really hard to accomplish. The majority of devices today are equipped with RGB cameras. Smart devices in recent years rarely have RGBD cameras on them. We have come to a dilemma that we are not able to apply our algorithms to more general scenarios. So I have changed my perspective to try some 3D reconstruction algorithms on ordinary RGB cameras. As a result, we shift our attention to human face analysis in RGB images. Detection faces in photos are critical in intelligent applications. However, this is far from enough for modern application scenarios. Many applications require accurate localization of facial landmarks. Face Alignment (FA) is critical for face analysis, it has been studied extensively in recently years. For academia, research work among this line is challenging when face images have extreme poses, lighting, expressions, and occlusions etc. Besides, FA is also a fundamental component in all face analysis algorithms. For industry, once having these facial key point locations, many impossible applications becomes reachable. A robust FA algorithm is in great demand. We developed our proposed Convolutional Neural Networks (CNN) on Deep Learning framework Caffe while employing a GPU server of 8 NVIDIA TitanX GPUs. Once finalized the CNN structure, thousands of human-labeled face image data are used to train the proposed CNN on a GPU server cluster with 2 nodes connected by Infinite Band. Each node has 4 NVIDIA K-40 GPU on its own. Our framework outperforms deep learning state-of-the-art algorithms.
Temple University--Theses
Han, Ching-Pei B. "3D alchemy : a guide to 3D realistic computer graphics /." Online version of thesis, 1993. http://hdl.handle.net/1850/11747.
Full textBerdeu, Anthony. "Imagerie sans lentille 3D pour la culture cellulaire 3D." Thesis, Université Grenoble Alpes (ComUE), 2017. http://www.theses.fr/2017GREAS036/document.
Full textThis PhD work is at the interface of two fields: 3D cell culture and lens-free imaging.Providing a more realistic cell culture protocol on the physiological level, switching from single-layer (2D) cultures to three-dimensional (3D) cultures - via the use of extracellular gel in which cells can grow in three dimensions - is at the origin of several breakthroughs in several fields such as developmental biology, oncology and regenerative medicine. The study of these new 3D structures creates a need in terms of 3D imaging.On another side, 2D lens-free imaging provides a robust, inexpensive, non-labeling and non-toxic tool to study cell cultures in two dimensions over large scales and over long periods of time. This type of microscopy records the interferences produced by a coherent light scattered by the biological sample. Knowing the physics of the light propagation, these holograms are retro-propagated numerically to reconstruct the unknown object. The reconstruction algorithm replaces the absent lenses in the role of image formation.The aim of this PhD is to show the possibility of adapting this lens-free technology for imaging 3D cell culture. New lens-free microscopes are designed and built along with the development of dedicated tomographic reconstruction algorithms.Concerning the prototypes, several solutions are tested to finally converge to a scheme combining two conditions. The first requirement is the choice of simplicity of use with a cell culture in standard Petri dish and requiring no specific preparation or change of container. The second condition is to find the best possible angular coverage of lighting angles in regards of the geometric constraint imposed by the first requirement. Finally, an incubator-proof version is successfully built and tested.Regarding the algorithms, four major types of solutions are implemented, all based on the Fourier diffraction theorem, conventionally used in optical diffractive tomography. All methods aim to correct two inherent problems of a lens-free microscope: the absence of phase information, the sensor being sensitive only to the intensity of the incident wave, and the limited angular coverage. The first algorithm simply replaces the unknown phase with that of an incident plane wave. However, this method is fast but it is the source of many artifacts. The second solution tries to estimate the missing phase by approximating the unknown object by an average plane and uses the tools of the 2D lens-free microscopy to recover the missing phase in an inverse problem approach. The third solution consists in implementing a regularized inverse problem approach on the 3D object to reconstruct. This is the most effective method to deal with the two problems mentioned above but it is very slow. The fourth and last solution is based on a modified Gerchberg-Saxton algorithm with a regularization step on the object.All these methods are compared and tested successfully on numerical simulations and experimental data. Comparisons with conventional microscope acquisitions show the validity of the reconstructions in terms of shape and positioning of the retrieved objects as well as the accuracy of their three-dimensional positioning. Biological samples are reconstructed with volumes of several tens of cubic millimeters, inaccessible in standard microscopy.Moreover, 3D time-lapse data successfully obtained in incubators show the relevance of this type of imaging by highlighting large-scale interactions between cells or between cells and their three-dimensional environment
Mehr, Éloi. "Unsupervised Learning of 3D Shape Spaces for 3D Modeling." Electronic Thesis or Diss., Sorbonne université, 2019. http://www.theses.fr/2019SORUS566.
Full textEven though 3D data is becoming increasingly more popular, especially with the democratization of virtual and augmented experiences, it remains very difficult to manipulate a 3D shape, even for designers or experts. Given a database containing 3D instances of one or several categories of objects, we want to learn the manifold of plausible shapes in order to develop new intelligent 3D modeling and editing tools. However, this manifold is often much more complex compared to the 2D domain. Indeed, 3D surfaces can be represented using various embeddings, and may also exhibit different alignments and topologies. In this thesis we study the manifold of plausible shapes in the light of the aforementioned challenges, by deepening three different points of view. First of all, we consider the manifold as a quotient space, in order to learn the shapes’ intrinsic geometry from a dataset where the 3D models are not co-aligned. Then, we assume that the manifold is disconnected, which leads to a new deep learning model that is able to automatically cluster and learn the shapes according to their typology. Finally, we study the conversion of an unstructured 3D input to an exact geometry, represented as a structured tree of continuous solid primitives
Романюк, О. Н., and В. М. Чорний. "Особливості технологій 3D-біопрінтінгу." Thesis, Cумський державний університет, 2016. http://essuir.sumdu.edu.ua/handle/123456789/47639.
Full textРомбовський, Михайло Юрійович, Михаил Юрьевич Ромбовский, Mykhailo Yuriiovych Rombovskyi, and С. В. Терновський. "Технології відображення 3D відео." Thesis, Видавництво СумДУ, 2011. http://essuir.sumdu.edu.ua/handle/123456789/13830.
Full textБаскаков, Е., and В. Шерстюк. "3-D принтери в машинобудуванні." Thesis, Сумський державний університет, 2018. http://essuir.sumdu.edu.ua/handle/123456789/67099.
Full textСвириденко, Ю. А. "Человек в мире 3D." Thesis, Сумский государственный университет, 2013. http://essuir.sumdu.edu.ua/handle/123456789/40921.
Full textСлухай, С. "Применение 3D-принтеров в стоматологии." Thesis, Сумский государственный университет, 2016. http://essuir.sumdu.edu.ua/handle/123456789/48328.
Full textLouro, Vinicius Hector Abud. "Procedimentos de análise em magnetometria: estimativa de magnetização remanente visando inversões para exploração mineral." Universidade de São Paulo, 2013. http://www.teses.usp.br/teses/disponiveis/14/14132/tde-21062013-142824/.
Full textIn this study, we present a procedure of analysis of magnetic data when remanence is present in order to, at the end of the process, obtain an inversion faster and more reliable inversion. The procedure is composed of six steps: (1) Estimation of the borders of the target; (2) Estimation of its depths; (3) A sweeping for the total apparent inclination and declination directions; (4) Initial modeling of a synthetic body, based on the recovered geometry and depth, on the directions of inclination and declination of the total magnetic field, and on previous analysis of the target and/or its region; (5) Inversion of magnetic data using the initial model; and (6) Attribution of the magnetic features of step (3) to the model recovered by the inversion for a final modeling of the target, estimating as well its remanent magnetization; the last through the vectorial resultant of the induction and total magnetization subtraction. This procedure was applied to 108 synthetic and to 8 real cases from the Alto do Paranaíba and Rondonian-San Ignacio Igneous Provinces. Their results pointed out that the error between the recovered directions of the magnetization components and the original values, in synthetic cases, was smaller than 10%; The inversions had their processing-time reduced in more than 20% and, qualitatively, presented models were more similar to the original (synthetic cases) and geologically feasible (real cases).
Mundle, Heiko. "Kartographische Online-3D-Plattformen : Methana 3D: eine kartographische Online-3D-Plattform mit Datenbankanbindung der Halbinsel Methana (Griechenland) /." Karlsruhe : Fachhochschule Karlsruhe, Fachbereich Geoinformationswesen, 2000. http://www.gbv.de/dms/bs/toc/314081178.pdf.
Full textJonasson, Per, and Ola Elmvik. "Interaktiv 3d-grafik : utveckling av en 3d-applikation för Internet." Thesis, Linköping University, Department of Science and Technology, 2002. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-1229.
Full textInteraktiv 3d-grafik är ett område som i dagsläget genomgår stora förändringar med ständigt ökad efterfrågan. Tack vare förbättrad mjuk- och hårdvara går det idag att åstadkomma saker som bara för ett par år sedan var fiktion.
Syftet med rapporten är att dokumentera dessa möjligheter genom att undersöka grunderna för hantering och manipulering av 3d-modeller i programvaran Macromedia Director 8.5, samt implementera denna kunskap i en interaktiv 3d- applikation.
3d-grafik som används i Director är polygonbaserad och renderas i realtid på användarens dator. Moduleringen av 3d-grafiken kan utföras på två sätt, antingen i programmeringsspråket Lingo eller via fristående program. Director erbjuder goda möjligheter för manipulering av 3d-modeller vilket har utnyttjas i arbetets praktiska del.
Den praktiska delen av vårt arbete har resulterat i en applikation där användaren kan inreda ett virtuellt rum i 3d-miljö. All interaktion med denna sker i realtid. Applikationen kan användas som plattform för projekt där företag vill visualisera sina produkter i en interaktiv 3d-miljö.
För att skapa en sådan interaktiv 3d-miljö krävs det i dagsläget goda kunskaper om hur 3d-grafik är uppbyggd och hur den hanteras i programmeringsspråket Lingo. Denna rapport är ämnad att ge läsaren en inblick av detta.
Giehl, Markus. "3D-Bildgebung mit einem mobilen C-Bogen (Iso-C 3D)." Diss., lmu, 2006. http://nbn-resolving.de/urn:nbn:de:bvb:19-62992.
Full textBreckon, Toby P. "Completing unknown portions of 3D scenes by 3D visual propagation." Thesis, University of Edinburgh, 2006. http://hdl.handle.net/1842/1244.
Full textPinto, Sílvia Cristina Dias. "Análise de formas 3D usando wavelets 1D, 2D e 3D." Universidade de São Paulo, 2005. http://www.teses.usp.br/teses/disponiveis/76/76132/tde-02052007-085441/.
Full textThis work presents new methods for three-dimensional shape analysis in the context of computational vision, being emphasized the use of 1D, 2D and 3D wavelet transforms, which provide a multiscale analysis of the studied shapes. The analyzed shapes are divided in three different types depending on their representation: f(t)=(x(t),y(t),z(t)), f(x,y)=z and f(x,y,z)=w. Each type of shape is analyzed by a more suitable method. Firstly, such shapes undergo a pre-processing procedure followed by the characterization using the 1D, 2D or 3D wavelet transform, depending on its representation. This application allows to extract features that are rotation- and translation-invariant, based on some mathematical concepts of differential geometry. In this work, we emphasize that it is not necessary to use the parameterized version of the 2D and 3D shapes. The experimental results obtained from shapes extracted from medical and biological images, that corroborate the introduced methods, are presented.
Юсеф, Алі. "Інформаційна підтримка створення ієрархічної структури 3D-об’єктів для 3D-сцен." Bachelor's thesis, КПІ ім. Ігоря Сікорського, 2019. https://ela.kpi.ua/handle/123456789/31091.
Full textStructure and extent of the project. The explanatory note of this graduation project consists of six sections, contains 16 drawings, 10 tables, 1 supplement, and 27 sources. For this thesis the theme that was implemented is «Informational Support for Creating a 3D-Object Hierarchical Structure for 3D Environments», the purpose of which is to ease the implementation of 3D Assets in 3D environments created in the Unreal Engine 4, by categorizing and sorting a large number of 3D assets, simplifying the process of importing assets into the library and simplifying the process of exporting assets to the Unreal Engine 4 editor. The general provisions section describes the activities and use cases of the system. In the informational provision section, the input and output data were defined, and the database structure was shown. The mathematical provision section provides a detailed description of the mathematical algorithms that have been used. The software provision section describes the main tools used to develop the program, the technical requirements for the system on which the program will be launched, and the software architecture selected for development. The technical provision section consists of the user manual, and a number of tests conducted to evaluate the quality assurance of the program.
Lind, Olof. "Designrekommendationer för 3D-interiör : En kvalitativ studie för 3D-applikationer." Thesis, Luleå tekniska universitet, Institutionen för system- och rymdteknik, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-82661.
Full textZhu, Junyi S. M. Massachusetts Institute of Technology. "A software pipeline for converting 3D models into 3D breadboards." Thesis, Massachusetts Institute of Technology, 2019. https://hdl.handle.net/1721.1/122732.
Full textCataloged from PDF version of thesis.
Includes bibliographical references (pages 44-46).
3D breadboards are a new form of physical prototypes with breadboard functions directly integrated into its surfaces. 3D breadboards offer both the flexibility and re-configurability of breadboards, while also integrating well with the shape of the prototype. As a result, 3D breadboards can be used to test function directly in context of the actual physical form. Our custom 3D editor plugin supports designers in the process of converting 3D models into 3D breadboards. Our plugin first generates a pinhole pattern on the surface of the 3D model; designers can then connect the holes into power lines and terminal strips depending on the desired layout. To fabricate the 3D breadboards, designers only have to 3D print the housing and then fill the wire channels with conductive silicone. We explore a number of computational design and computer graphics approaches to convert arbitrary 3D models into 3D breadboards. We demonstrate a range of different interactive prototypes designed by our software system, and report on a user study with six participants to validate the concept of integrating breadboards into physical prototypes.
by Junyi Zhu.
S.M. in Computer Science and Engineering
S.M.inComputerScienceandEngineering Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science
Dang, Quoc Viet. "Similarités dans des Modèles BRep Paramétriques : Détection et Applications." Phd thesis, Toulouse, INPT, 2014. http://oatao.univ-toulouse.fr/12154/1/Dang_quoc_viet.pdf.
Full textPavlyuk, M. O. "3D printers and printing." Thesis, Sumy State University, 2014. http://essuir.sumdu.edu.ua/handle/123456789/45447.
Full textHammoudi, Karim. "Contributions to the 3D city modeling : 3D polyhedral building model reconstruction from aerial images and 3D facade modeling from terrestrial 3D point cloud and images." Phd thesis, Université Paris-Est, 2011. http://tel.archives-ouvertes.fr/tel-00682442.
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