Littérature scientifique sur le sujet « Caméra participante »
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Articles de revues sur le sujet "Caméra participante"
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van Heerden, Alastair, Doug Wassenaar, Zaynab Essack, Khanya Vilakazi et Brandon A. Kohrt. « In-Home Passive Sensor Data Collection and Its Implications for Social Media Research : Perspectives of Community Women in Rural South Africa ». Journal of Empirical Research on Human Research Ethics 15, no 1-2 (21 octobre 2019) : 97–107. http://dx.doi.org/10.1177/1556264619881334.
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There has been a recent increase in debates on the ethics of social media research, passive sensor data collection, and big data analytics. However, little evidence exists to describe how people experience and understand these applications of technology. This study aimed to passively collect data from mobile phone sensors, lapel cameras, and Bluetooth beacons to assess people’s understanding and acceptance of these technologies. Seven households were purposefully sampled and data collected for 10 days. The study generated 48 hr of audio data and 30,000 images. After participant review, the data were destroyed and in-depth interviews conducted. Participants found the data collected acceptable and reported willingness to participate in similar studies. Key risks included that the camera could capture nudity and sex acts, but family review of footage before sharing helped reduce concerns. The Emanuel et al. ethics framework was found to accommodate the concerns and perspectives of study participants.
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Rahim, Nurul Hidayah, et Shigang Li. « Estimate Gaze Point of Table-Meeting Participants by Spherical Camera ». IEEJ Transactions on Electronics, Information and Systems 143, no 5 (1 mai 2023) : 569–75. http://dx.doi.org/10.1541/ieejeiss.143.569.
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Winter, Theres, et Emmanuel Akwasi Adu-Ampong. « Residents with camera : Exploring tourism impacts through participant-generated images ». Annals of Tourism Research 87 (mars 2021) : 103112. http://dx.doi.org/10.1016/j.annals.2020.103112.
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Ferryanto, F., Andi Isra Mahyuddin et Motomu Nakashima. « DEVELOPMENT OF A MARKERLESS OPTICAL MOTION CAPTURE SYSTEM BY AN ACTION SPORTS CAMERA FOR RUNNING MOTION ». ASEAN Engineering Journal 12, no 2 (1 juin 2022) : 37–44. http://dx.doi.org/10.11113/aej.v12.16760.
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A marker-based optical motion capture system is often used to obtain the kinematics parameters of a running analysis. However, the attached marker could affect the participant's movement, and the system is costly because of the exclusive cameras. Due to its drawbacks, the present research aimed to develop an affordable markerless optical motion capture system for running motion. The proposed system used an action sports camera to acquire the running images of the participant. The images were segmented to get the silhouette of the participant. Then, a human body model was generated to provide a priori information to track participants' segment position. The subsequent procedure was image registration to estimate the pose of the participant's silhouette. The transformation parameters were estimated by particle swarm optimization. The optimization output in the form of the rotation angle of the body segment was then employed to identify right or left lower limbs. To validate the results of the optimization, a manual matching was conducted to obtain the actual rotation angle for all body segments. The correlation coefficient between the rotation angle from image registration and the actual rotation angle was then evaluated. It was found that the lowest correlation coefficient was 0.977 for the left foot. It implies that the accuracy of the developed system in the present work is acceptable. Furthermore, the results of the kinematics analysis have good agreement with the literature. Therefore, the developed system, not only yields acceptable running parameters, but also affordable since it uses an action sports camera and easy to use.
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Jones, W. Paul, Pamela A. Staples, J. Kelly Coker et Robert L. Harbach. « Impact of Visual Cues in Computer-Mediated Vocational Test Interpretation ». Journal of Applied Rehabilitation Counseling 35, no 1 (1 mars 2004) : 16–22. http://dx.doi.org/10.1891/0047-2220.35.1.16.
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Online delivery of rehabilitation counseling can make services more widely available, but more information is needed about specific features before it can be considered a viable approach. Video conferencing with broadcast of counselor and client image is one recommended tool with some evidence that client rating of session depth may be equivalent to face-to-face sessions but at a cost of increased client discomfort. In this study, the counselor's image was broadcast to 24 participants in online test interpretation sessions Broadcast of participant image to the counselor was contingent on random assignment. The Session Evaluation Questionnaire completed by participants at the end of the session showed no significant impact on ratings of session of depth between camera-on and camera-off conditions. Session smoothness/comfort ratings, however, were significantly higher when the participant image was not broadcast to the counselor. Implications for rehabilitation counseling are discussed.
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Zhang, Yu, et Haiqing Liu. « Traffic Participant Classification Method Based on Decision Tree for Point Cloud Data Detected by Event Camera ». Journal of Physics : Conference Series 2491, no 1 (1 avril 2023) : 012002. http://dx.doi.org/10.1088/1742-6596/2491/1/012002.
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Abstract Event camera has the advantage of accurately identifying moving targets while being insensitive to stationary targets, which makes up for the lack of traditional video streaming camera and has a wide range of applications in the field of traffic flow detection. In this paper, a traffic participant classification method based on a decision tree for point cloud data acquired by an event camera in a roadside installation scenario is proposed. For traffic identification, 5 basic features to describe the geometrical and quantitative characteristics, and 8 Gaussian projection features to describe the point distribution characteristics are extracted and analyzed. Furthermore, the CART decision tree is used to identify four kinds of traffic participants, including the large vehicle, the compact vehicle, the non-motor vehicle, and the pedestrian. By modulating parameters of the maximum layer and feature weighting values, the proposed method can reach equilibrium in generalization ability and accuracy. Experimental results show that the proposed method demonstrates high accuracy of 97.49% in target participant classification.
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Papatheodorou, Theodoros, et Jessica Wolpert. « Lights ! Dance ! Freeze ! » Proceedings of the ACM on Computer Graphics and Interactive Techniques 6, no 2 (12 août 2023) : 1–8. http://dx.doi.org/10.1145/3597620.
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Conventionally, spectators enjoy films passively. This paper describes an interactive film installation that invites participants to use their entire body as a query to search and explore a large corpus of musical films in a novel way. Using an RGB camera, ML-based skeleton tracking technology and a unique pose and film indexing system, this installation tracks a participant's movements and mirrors them in real-time by finding matching poses among hundreds of thousands from well-known musicals. When the participant freezes in a pose, the installation instantly plays back the short film clip that begins with that pose, immersing them in the music and dance from musicals of different eras. This approach explores themes of tangible interfaces and the new possibilities that emerge from employing embodied interaction to traverse the dance pose space, which is traditionally difficult to index and interact with in real time. The pose indexing system and whole-body interaction we propose in this paper open new pathways for cultural participation, as they lend themselves to different datasets and require no technical skills from participants.
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Decorte, Robbe, Jelle De Bock, Joachim Taelman, Maarten Slembrouck et Steven Verstockt. « Fully Automatic Camera for Personalized Highlight Generation in Sporting Events ». Sensors 24, no 3 (23 janvier 2024) : 736. http://dx.doi.org/10.3390/s24030736.
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Personally curated content in short-form video formats provides added value for participants and spectators but is often disregarded in lower-level events because it is too labor-intensive to create or is not recorded at all. Our smart sensor-driven tripod focuses on supplying a unified sensor and video solution to capture personalized highlights for participants in various sporting events with low computational and hardware costs. The relevant parts of the video for each participant are automatically determined by using the timestamps of his/her received sensor data. This is achieved through a customizable clipping mechanism that processes and optimizes both video and sensor data. The clipping mechanism is driven by sensing nearby signals of Adaptive Network Topology (ANT+) capable devices worn by the athletes that provide both locality information and identification. The device was deployed and tested in an amateur-level cycling race in which it provided clips with a detection rate of 92.9%. The associated sensor data were used to automatically extract peloton passages and report riders’ positions on the course, as well as which participants were grouped together. Insights derived from sensor signals can be processed and published in real time, and an upload optimization scheme is proposed that can provide video clips for each rider a maximum of 5 min after the passage if video upload is enabled.
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Wen, Pingping, Ahmad Zamzuri Mohamad Ali et Fei Lu. « Examining the User Experience of a Digital Camera Virtual Reality Lab with Attention Guidance ». International Journal of Information and Education Technology 12, no 8 (2022) : 696–703. http://dx.doi.org/10.18178/ijiet.2022.12.8.1673.
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In recent years, virtual reality labs have been widely used in teaching. Virtual reality labs built by virtual reality technology have been applied in different disciplines. Many studies have also shown that virtual reality experiments can replace real experiments, and some even have better learning effects than real experiments. For current digital camera experiment courses in China, it is necessary to use virtual reality labs. Attention guidance is added to the design of experimental courses. However, questions arise about learners’ acceptance and experience of digital camera virtual reality labs. Another potential problem is learners’ acceptance and experience of labs after attentional guidance is added. Therefore, the purpose of this research is to design and develop a digital camera virtual reality lab and study various aspects of the user experience (UX). The User Experience Questionnaire (UEQ) was used to obtain students' responses after completing digital camera virtual reality experimental courses. The subjects were 30 college students (N = 30). Participants were divided into two groups. In the first group, 15 students participate in the test of the virtual reality lab with attention guidance, and in the other group, 15 students participate in the test of the virtual reality lab without attention guidance. From the results, it is concluded that the UX level of the digital camera virtual reality lab is promising and positive. The subjects were satisfied with the virtual reality lab with attention guidance and without attention guidance, though the subjects with attention guidance were more satisfied.
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Watanabe, Ko, Yusuke Soneda, Yuki Matsuda, Yugo Nakamura, Yutaka Arakawa, Andreas Dengel et Shoya Ishimaru. « DisCaaS : Micro Behavior Analysis on Discussion by Camera as a Sensor ». Sensors 21, no 17 (25 août 2021) : 5719. http://dx.doi.org/10.3390/s21175719.
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The emergence of various types of commercial cameras (compact, high resolution, high angle of view, high speed, and high dynamic range, etc.) has contributed significantly to the understanding of human activities. By taking advantage of the characteristic of a high angle of view, this paper demonstrates a system that recognizes micro-behaviors and a small group discussion with a single 360 degree camera towards quantified meeting analysis. We propose a method that recognizes speaking and nodding, which have often been overlooked in existing research, from a video stream of face images and a random forest classifier. The proposed approach was evaluated on our three datasets. In order to create the first and the second datasets, we asked participants to meet physically: 16 sets of five minutes data from 21 unique participants and seven sets of 10 min meeting data from 12 unique participants. The experimental results showed that our approach could detect speaking and nodding with a macro average f1-score of 67.9% in a 10-fold random split cross-validation and a macro average f1-score of 62.5% in a leave-one-participant-out cross-validation. By considering the increased demand for an online meeting due to the COVID-19 pandemic, we also record faces on a screen that are captured by web cameras as the third dataset and discussed the potential and challenges of applying our ideas to virtual video conferences.
Thèses sur le sujet "Caméra participante"
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De, Coninck Cécile. « Enjeux politiques et esthétiques de l'anthropologie visuelle. Programmes et débats du Comité du Film Ethnographique (1947-1962) ». Electronic Thesis or Diss., Université de Lille (2022-....), 2024. https://pepite-depot.univ-lille.fr/ToutIDP/EDSHS/2024/2024ULILH048.pdf.
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Cette étude propose de retracer l'histoire du Comité du Film Ethnographique (CFE) dont les fondements furent établis à Paris en 1947 lors du Premier Congrès du Film Ethnologique et de géographie humaine. Les enjeux politiques et esthétiques de cette institution, créée officiellement en 1952, seront analysés à travers l'examen des documents d'archives relatifs aux catalogues de films, à leur réalisation et à leur réception ainsi qu'aux comptes rendus des débats-projections lors des séminaires et des festivals internationaux organisés par ses membres de 1953 à 1962. En proposant un tour d'horizon historiographique des différentes acceptions du concept d'anthropologie visuelle, nous examinerons dans quelle mesure le CFE fait figure de pionnier dans ce domaine en nous fondant sur les films qu'il produit et programme durant cette période. Si Jean Rouch en est la principale cheville ouvrière, il n'en est pas le seul artisan. Aussi cette étude se propose-t-elle de réinscrire ses films dans l'ensemble de la production des années trente jusqu'au début des années soixante en apportant un éclairage sur des films ethnographiques moins connus, notamment ceux de Luc de Heusch qui inventa le concept de caméra participante comme moyen de révéler les pouvoirs heuristiques du médium tout en contrecarrant sur le plan éthique, les stéréotypes des films de voyage « exotisants » et de propagande coloniale. Ainsi le CFE se situait-il à l'avant-garde d'une culture visuelle promouvant la recherche d'une alliance entre les ethnographes et les cinéastes pour créer une nouvelle forme de partage du sensible entre filmeur et filmé contribuant, dans le même temps, à faire bouger les lignes des fondements épistémologiques de la discipline ethnographique ainsi que celles des usages du médium-filmThis study proposes to retrace the history of the Ethnographic Film Committee (CFE) whose foundations were established in Paris in 1947 during the First Congress of Ethnological Film and Human Geography. The political and aesthetic issues of this institution, officially created in 1952, will be analyzed through the examination of archival documents relating to film catalogues, the making of films and their reception, reports of debates and screenings at seminars and international festivals organized by its members from 1955 to 1962. By offering a historiographical overview of the different meanings of the concept of visual anthropology, we will examine to what extent the CFE is a pioneer in this field based on the films it produced and programmed during this period. While Jean Rouch is the main driving force, he is not the only craftsman. This study therefore aims to re-inscribe his films in the overall production from 1930 to 1962 by shedding light on lesser-known ethnographic films, notably those of Luc de Heusch, who invented the concept of the participatory camera as a means of revealing the heuristic powers of the medium while ethically counteracting the stereotypes of “exotic” travel films and colonial propaganda. The CFE was thus at the forefront of a visual culture promoting the search for an alliance between ethnographers and filmmakers to create a new form of sharing the sensible between the filmmaker and the filmed, contributing at the same time to shifting the lines of the epistemological foundations of the ethnographic discipline as well as those of the uses of the film medium
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CANDRA, Martin. « Městský kamerový dohlížecí systém : ochrana bezpečnosti osob nebo ztráta soukromí ? » Master's thesis, 2012. http://www.nusl.cz/ntk/nusl-116779.
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The diploma thesis deals with one of the precautions of criminality - Urban camera supervising system, which is constantly more often used in cities and villages in the public. Together with the requirements of citizens to secure their safety it brings the risk of privacy loss. The main intention of this thesis is to place the Urban camera supervising system into the focus point of the dilemma between two basic human rights: the right of human privacy and personal safety right. Next to the description of the terms privacy and safety, the writer examines the harmony of legal regulations of Urban camera supervising system with the concept of human liberty and the status of the state in the point of securing human safety. This thesis thinks of the problem by empirical facts and different theoretical aspects of political philosophy and political thinking, especially liberalism and conservatism. The thesis also looks into the quality of the connection between the citizen and local public administration in the realization of the project of Urban camera supervising system.
Livres sur le sujet "Caméra participante"
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Lindegaard, Marie Rosenkrantz, et Heith Copes. Observational Methods of Offender Decision Making. Sous la direction de Wim Bernasco, Jean-Louis van Gelder et Henk Elffers. Oxford University Press, 2017. http://dx.doi.org/10.1093/oxfordhb/9780199338801.013.43.
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The strength of ethnography is that it combines the insights of what people say about crime with what they do when they make the decision to commit crime. Participant observation has played a key role in ethnographic research on crime, but it has become rare in criminology. This chapter argues that despite this development, new types of camera-based observations are emerging that can potentially bring new life into ethnographic research on crime. The chapter distinguishes between three types of observational methods (participant, researcher, and camera), and it discusses insights that have been gained from each method. Camera observations offer exciting possibilities of gaining insights into what offenders do as criminal events unfold. Although these types of observations may replace researcher observations because of higher detail and reliability, participant observations remain most suitable for the study of the socioeconomic circumstances of offenders and their experiences with committing crimes.
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Semillas de la arboleda : Varias autoras, participantes del proyecto, Mujer : escribir cambia tu vida 2020. Cuernavaca, Morelos : Fondo Editorial del Estado de Morelos, 2020.
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Vendaval en la floresta : Varias autoras, participantes del proyecto, Mujer : escribir cambia tu vida 2020. Cuernavaca, Morelos : Fondo Editorial del Estado de Morelos, 2020.
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Clark, Catherine E. “C’était Paris en 1970”. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780190681647.003.0006.
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In 1970, a new generation of municipal officials worked with the FNAC, a camera and electronics store that was also a major player on the French cultural scene, to organize an enormous amateur photo contest to document the French capital. Called “C’était Paris en 1970,” this competition asked participants to produce a comprehensive archive of Paris during the month of May. Their submissions provide remarkable access to how their makers understood older photographs as historical documents, how they imagined photography could picture the passage of time, and how, in turn, they imagined their own photos might one day be seen. These photos help take stock of how a century of photographic production, collection, and circulation had influenced the historical imagination.
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Isaacs, Dee. The Rime of the Ancient Mariner. University of Edinburgh, 2024. http://dx.doi.org/10.2218/ed.9781836450177.
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The BASCA-nominated Rime of the Ancient Mariner is a 3-act site-specific opera for large ensemble, SATB choir, and children’s chorus involving multi-staged performance and video projection, performed in the University of Edinburgh’s Old College Quad and Playfair Library.A collaborative project by composer Dee Isaacs, writer Gerda Stevenson, theatre director John Bett, and film-maker Ian Dodds, the project was conceived and produced as part of the University of Edinburgh’s Music in the Community programme in collaboration with teachers and pupils of Leith Walk Primary School and two professional musicians from West Africa, Gibril Camara and Aboubacar Sylla. Isaacs and Stevenson retell the story of Coleridge’s epic poem The Rime of the Ancient Mariner for our times. The opera explores the issues raised by the current refugee crisis in partnership with 25 university music students and 60 school children in a multi-lingual primary school with a high proportion of immigrants in an area of deprivation within the City of Edinburgh. In this multi-cultural environment, the participants’ experiences became an integral part of the production process, allowing a complex of interactions to arise through the media of music and theatre. The video and scenic components were devised to immerse both audience and participants in contemporary experiences of flight and diaspora. The production process was monitored and a final evaluation report was produced, allowing the stake-holders to assess the social and educational impacts of the project.
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Davies, Ann. Contemporary Spanish Gothic. Edinburgh University Press, 2016. http://dx.doi.org/10.3366/edinburgh/9781474402996.001.0001.
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This book considers the Gothic as mode in contemporary Spanish culture. Its underlying principle is to see the contemporary Spanish Gothic as part of a wider, transnational Gothic continuum. Therefore, although the proposed book will seek to tease out the Gothic specifically within Spanish culture it seeks simultaneously to connect that culture with debates further afield, looking at the interplay between national and transnational concerns. Its theoretical underpinning lies primarily within Gothic scholarship but also draws on the scholarship of contemporary Spanish and transnational culture. The book refigures the idea of transcultural reinscription away from the implied sense of a unidirectional flow. Instead, it takes the contemporary Gothic not as simply a reinscription specifically within Spanish culture, but as multiple and simultaneous reinscriptions whereby Spanish culture comes to participate in a wider Gothic in which the generic and the specific are constantly in play and at play. It does this through a series of case studies: Goya biopics, bestselling novels, the haunted house in Spanish film, the Gothic camera, Gothic medicine and the body.
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Arraes, Ricardo. Os soldados-fotógrafos da paz. Brazil Publishing, 2020. http://dx.doi.org/10.31012/9786550163938.
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The peacekeepers took part in the first UN-created peacekeeping mission from 1957 to 1967 on the Arab-Israeli border, more precisely in the conflicted Gaza Strip territory. Military personnel from ten nations made up the so-called UNEF and participated in the mission of a moment of relative peace in the region. Among the many tasks, the military armed themselves with cameras and toured the desert and various cities of the Middle East and presented us with a beautiful collection of vivid and powerful images of the land, war and culture that fascinating world in front of them. This book is not about the images themselves, but about their producers, the soldiers-photographers of peace
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Youth lens on the Silk Roads. Best photos from the International Silk Roads Photo Contest, 3rd edition. UNESCO, 2022. http://dx.doi.org/10.54678/dsue7368.
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This photo album, Youth Lens on the Silk Roads, is the result of the 3rd edition of the international photo contest Youth Eyes on the Silk Roads, organized by the UNESCO Silk Roads Programme, and with the generous support of the China World Peace Foundation. This annual initiative offers young people from all over the world a fantastic opportunity to explore the shared heritage, legacy and spirit of the Silk Roads through the art of photography. The ‘Silk Roads’ is an expression that refers to the vast and complex network of maritime and land routes that have linked East, South, and Southeast Asia, to Central Asia, the Russian Steppes, the Indian Subcontinent, the Iranian and Anatolian Plateaus, and the Arabian Peninsula for thousands of years. They also stretched through North and Northeast Africa, as well as Eastern and Southern Europe, before reaching Western Europe and the Iberian Peninsula. Taking these multifaceted routes as inspiration, the ‘Youth Eyes on the Silk Roads Photo Contest’ uses photography to extend these links into the modern day and, through visualising the legacy of commercial and cultural interactions along them, to foster mutual understanding and promote peace amongst the diverse societies of these regions. The 3rd edition of the Youth Eyes on the Silk Roads coincided with a period of profound global challenges resulting from the impacts of Covid-19. During this time, with the temporary closure of many schools and cultural institutions, young people all over the world faced many barriers to education access and to their engagement with culture, as well as to one another. In light of this, for the 3rd edition of the contest photographers were tasked with exploring the themes of ‘Textiles and Clothing’ and ‘Intercultural Exchanges in the time of Covid-19, Including in the Field of Textiles and Clothing’. Globally, responses to Covid-19 affected many industries important to the Silk Roads, such as textiles and clothing, and curtailed our ability to exchange and interact with one another. This year’s themes invited participants you use their cameras to capture these changes and challenges. Despite these impacts, textiles and clothing remain an important mode of creativity and human expression which link the interactions of the past with our present and future. The resulting photo album gathers together 75 of the very best photos from the two age categories (14-17-year-olds and 18-25-year-olds) which encapsulate the spirit of the contest and highlight the diversity of young people’s perceptions of the Silk Roads’ shared heritage. Through this collection of images, one can discover the rich and diverse legacy of textiles and clothing along the Silk Roads. The contest seeks to reflect the impact of Covid-19 on interaction and exchange, with a view to building our post-pandemic future. UNESCO Catno: 0000380933 https://doi.org/10.54678/DSUE7368 https://unesdoc.unesco.org/ark:/48223/pf0000380933
Chapitres de livres sur le sujet "Caméra participante"
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Westendorf, M., S. Thal, T. Ahrenhold et R. Henze. « Accuracy Requirements of Camera-Based Depth Estimation for Urban Automated Driving ». Dans Lecture Notes in Mechanical Engineering, 158–63. Cham : Springer Nature Switzerland, 2024. http://dx.doi.org/10.1007/978-3-031-70392-8_23.
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AbstractFor autonomous driving in urban areas higher accuracy requirements for localization of surrounding traffic participants become apparent. The use of cost-efficient camera sensors shows potential for a performant depth estimation and can supplement perception systems to achieve redundancy. Current research focuses on improving the algorithms towards better performance whereas the application-oriented analysis of present estimation errors in relation to urban traffic scenarios is often neglected. Based on stereo and mono camera images, a benchmark analysis of rule- and deep learning-based depth estimation approaches is conducted in this work. The error-prone estimation results are then analyzed against braking distances of urban traffic scenarios simulated by a two-track model to analyze the criticality of different depth estimation approaches. The application-oriented evaluation shows that current approaches could already be used in real automated driving systems and enable the definition of requirements.
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Zhang, Xingguo, Daiki Ikami et Pongsathorn Raksincharoensak. « Robust 3D On-Road Object Detection and Distance Estimation for Active Vehicle Control Systems Based on Monocular Camera Image Data ». Dans Lecture Notes in Mechanical Engineering, 454–60. Cham : Springer Nature Switzerland, 2024. http://dx.doi.org/10.1007/978-3-031-70392-8_65.
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Abstract3D object detection from monocular camera videos constitutes a critical research domain. Achieving robust 3D object detection in databases lacking annotated information poses a highly challenging task. This paper proposes a simple yet effective transfer learning approach, integrating data alignment, 3D object detection, and dynamic result correction. Vanishing point detection is employed to infer camera angles in diverse scenes, and preprocessing of new data is conducted by considering the camera's pitch angle and vanishing point position. Subsequently, MonoDETR are applied for depth estimation and 3D object detection in monocular videos. Building upon the detection results, dynamic correction is achieved through inter-frame assistance, culminating in the final 3D object information. Validation on the TUAT Near-Miss Incident Database demonstrates the efficacy of the proposed approach. The results indicate a substantial reduction in the cost of annotating new domain data while simultaneously enhancing detection accuracy and robustness. Integration with onboard diagnostics (OBD) data allows the reconstruction of information about various traffic participants in hazardous scenarios, providing valuable insights for in-depth analysis of accident causes.
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Cronin, Neil, Ari Lehtiö et Jussi Talaskivi. « Research for JYU : An AI-Driven, Fully Remote Mobile Application for Functional Exercise Testing ». Dans Communications in Computer and Information Science, 279–87. Cham : Springer Nature Switzerland, 2024. http://dx.doi.org/10.1007/978-3-031-59091-7_18.
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AbstractAs people live longer, the incidence and severity of health problems increases, placing strain on healthcare systems. There is an urgent need for resource-wise approaches to healthcare. We present a system built using open-source tools that allows health and functional capacity data to be collected remotely. The app records performance on functional tests using the phone’s built-in camera and provides users with immediate feedback. Pose estimation is used to detect the user in the video. The x, y coordinates of key body landmarks are then used to compute further metrics such as joint angles and repetition durations. In a proof-of-concept study, we collected data from 13 patients who had recently undergone knee ligament or knee replacement surgery. Patients performed the sit-to-stand test twice, with an average difference in test duration of 1.12 s (range: 1.16–3.2 s). Y-coordinate locations allowed us to automatically identify repetition start and end times, while x, y coordinates were used to compute joint angles, a common rehabilitation outcome variable. Mean difference in repetition duration was 0.1 s (range: −0.4–0.4 s) between trials 1 and 2. Bland-Altman plots confirmed general test-retest consistency within participants. We present a mobile app that enables functional tests to be performed remotely and without supervision. We also demonstrate real-world feasibility, including the ability to automate the entire process, from testing to analysis and the provision of real-time feedback. This approach is scalable, and could form part of national health strategies, allowing healthcare providers to minimise the need for in-person appointments whilst yielding cost savings.
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Califano, Rosaria, Iolanda Fiorillo, Giovanni Baglivo, Claudia Chirico, Antonietta Dello Russo, Jose Garro, Michele Leo, Conrado Pacheco, Gianluca Vitolo et Alessandro Naddeo. « Comfort Driven Redesign : The Case of Library Chairs ». Dans Lecture Notes in Mechanical Engineering, 155–61. Cham : Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-70566-4_25.
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AbstractUniversity students spend most of their time in a sitting position. Prolonged sitting on ill-fitted furniture and the resulting lousy posture is making students having different musculoskeletal disorders and is strictly related to students learning outcomes. This study aims to improve postural comfort of chairs placed inside the Science & Technology Library at the University of Salerno. A previous study about these library chairs showed that the lumbar area was the most suffering part while perceived (dis)comfort was dependent on time. Based on this, an ergonomic redesign and, consequently, manufacturing of the chair has been done. A perceived-comfort comparison between the library chair and the redesigned one has been performed. A statistical sample of 28 healthy students performed a 20-min experiment two times, alternatively on the library chair and the redesigned one. The 20-min experiment was divided into two 10-min tasks (“Reading & Writing” and “Laptop use”) to simulate a study day. The participants’ postures were acquired non-invasively using cameras and processed by Kinovea; questionnaires were used to rate the perceived subjective (dis)comfort. A procedure for improving an existing product through a comfort-driven redesign is proposed. Results showed the redesigned library chair lead on increasing postural comfort (particularly in the lumbar area) thanks to the new design and modifications.
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Kos, Marjanca, Sue Dale Tunnicliffe, Luka Praprotnik et Gregor Torkar. « Learning Biology in the Early Years Through Nature Play in the Forest : An Exploratory Study from Slovenia ». Dans Shaping the Future of Biological Education Research, 245–59. Cham : Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-44792-1_18.
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AbstractNature play is defined as freely chosen, unstructured interactions with and in nature. The aim of this study was to find out how nature play provides preschool children with play episodes where they experienced biological phenomena and living organisms. 21 four-to-six-year-old children from a preschool in Slovenia participated in the study. They were told to play in the forest. Their play was observed over four consecutive days, with each session lasting 1 h and a half. Three randomly selected children were equipped each time with small video cameras attached to their heads to automatically record sound and images from their perspective. The recordings were transcribed and edited, independently reviewed and analysed. 12 recordings were analysed, a total of 1167 min. 14.9% of the time was identified as play episodes in which the children experienced biological phenomena. The children paid more attention to animals than plants and fungi. Experiences with observed animals were more emotionally engaging and led to deeper learning about them. Many of the play episodes in which the teachers were invited to join were longer and led to deeper learning. This study has shown the importance of nature play for learning biology in early years.
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Mutz, Diana C. « Real-World Contexts ». Dans In-Your-Face Politics. Princeton University Press, 2015. http://dx.doi.org/10.23943/princeton/9780691165110.003.0005.
Texte intégralRésumé :
This chapter looks at the characteristics of the experimental treatments that are used to manipulate incivility, as well as the kinds of people used in the experiments. Because of the high degree of control over the political content of the broadcasts, the participants involved in the conflicts, and the way in which the cameras covered the dispute, it is possible to draw strong causal inferences about the impact that incivility and camera perspective have on viewers' experiences of political conflict. Although the professional production quality meant that none of the subjects voiced suspicions about the programs themselves, it is still plausible that other, unidentified differences between the real world and this exchange may have altered the outcomes.
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Wang, Qiurui, Caihong He et Jun Hu. « Calm Digital Art Installation for Alleviating Sedentary Anxiety : A Case Study ». Dans Frontiers in Artificial Intelligence and Applications. IOS Press, 2024. http://dx.doi.org/10.3233/faia240122.
Texte intégralRésumé :
With the prevalence of sedentary behavior in modern office environment, anxiety symptoms among office workers have been on the rise. This study aims to explore a camera-based system for monitoring sedentary behavior in office crowds and a novel device utilizing dynamic digital art to alleviate anxiety. By analyzing captured images from the camera, we can detect and record the sedentary time of office crowds in real-time, effectively identifying potential anxiety symptoms. Subsequently, we design a series of dynamic digital art pieces that stimulate and guide viewers’ sensory experiences through variations in colors and forms to alleviate anxiety. Using a co-constructing story approach, we conducted a user study involving 30 participants to stimulate their imaginations and visions. The results indicate that capturing sedentary behavior in office crowds through cameras and combining it with dynamic digital art as a means to alleviate anxiety significantly reduces anxiety levels among office workers. This research provides an innovative solution to improve the mental well-being of office workers, with potential implications for other related fields of study.
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Strafaccia, Heather Lee. « The Language of Video Intimacy ». Dans Advances in Educational Technologies and Instructional Design, 206–30. IGI Global, 2014. http://dx.doi.org/10.4018/978-1-4666-4482-3.ch013.
Texte intégralRésumé :
This case provides ideas about using video communication in communication and values it may have in distance relationships and implications for increasing the sense of connection in long distance teaching contexts. This study examines influences of Web camera use for married couples in long distance relationships. A research survey explored martial satisfaction with Web camera communication. To measure the satisfaction of participants, the Satisfaction with Married Life Scale from the Johnson, Zabriskie, and Hill (2006) study, and the relational maintenance strategies from the Stafford and Canary (1991) study are applied. Participants (N = 74) were married, United States citizens, who experienced a geographical separation for more than seven days. Findings suggest that Web camera communication offers a mode in long distance relationships to increase marital satisfaction. Web camera communication may increase the educational satisfaction as a teaching device and assist in linking cultures to expand educational opportunities regardless of geographical location.
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E.-M. Elonge, Martin, et Kingsley L. Ngange. « Effectiveness of Nonverbal Communicators (CCTV) in Crisis Situations : An Agenda Setting Perspective on the Cameroon Anglophone Crisis ». Dans Online Identity - An Essential Guide [Working Title]. IntechOpen, 2023. http://dx.doi.org/10.5772/intechopen.1002505.
Texte intégralRésumé :
Relevance of closed circuit television (CCTV) cameras in the Cameroon Anglophone crisis (CAC) (2016–2020) is explored as effectiveness of nonverbal communicators in crisis situations from a qualitative perspective. Findings reveal that nonverbal communicators are effective and strategic in crisis communication and management. Exploration on CCTV, security and crime prevention (deterrence) demonstrate that the technology is used for security, which according to participants (66.6%), CCTV cameras directly deter intentions of criminal activities within the Buea municipality. Participant’s experiences suggest CCTV cameras have the potential to communicate agenda(s) (active and latent). Nonverbal communication/communicators play important roles in crisis development, escalation and resolution. Increasing digitalization and smart living, call for attention on privacy. Understanding the technologies of nonverbal communication, how they are reshaping media surveillance; influencing decision making processes and policy frameworks of governments, and policing in the era of ‘big data’ and ‘big brother,’ is crucial.
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Bricca, Jacob. « Presence Framing ». Dans How Documentaries Work, 84—C4.N21. Oxford University PressNew York, 2023. http://dx.doi.org/10.1093/oso/9780197554104.003.0005.
Texte intégralRésumé :
Abstract Chapter 4 introduces the term “presence framing” (or “the framing of presence”) as the way in which documentaries arrange their materials for the audience in order to suggest a particular interpretation of the onscreen relationship between the participants, the camera, and the filmmaker. Some documentaries use observational framing, cutting out all references to the act of filming and creating a world in which it appears that the camera was never seen or noticed by the participants. Participatory framing, by contrast, acknowledges the presence of the filmmaker to some degree, either by implication (since the interviewees are talking to someone offscreen) or more explicitly by having the participants interact with the filmmaker onscreen or talk to them offscreen. The reflexive frame critiques the entire filmmaking project by throwing attention onto the illusory nature of all documentary filmmaking. The role of the narrator is discussed in the context of presence framing, and the ways in which filmmakers alter the outcome of the events they portray are elaborated upon. The concept of the semi-staged scene is introduced, in which participants appear to discuss things between themselves but have in fact been directed to do so.
Actes de conférences sur le sujet "Caméra participante"
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Schutte, Paul. « Using Touchscreens in a Rotorcraft Environment ». Dans Vertical Flight Society 74th Annual Forum & Technology Display, 1–11. The Vertical Flight Society, 2018. http://dx.doi.org/10.4050/f-0074-2018-12742.
Texte intégralRésumé :
This paper describes the flight test of a mounted touchscreen device in a UH-60 helicopter. The device assists crew chiefs in their fuel management tasks and provides situational awareness information regarding the route/flight plan, map data, external camera displays, publications and aircraft system information. The touchscreen tested was a 10.5" display and used Projected Capacitive for touch input. It was surrounded by 28 bezel switches. Eight current crew chiefs performed tasks using the device in flight. The participants wore gloves. Flight test evaluation results show that the subjects used and preferred the bezel switches over soft buttons on the touchscreens. Results also show that 16% percent of touchscreen presses required multiple presses to register the touch. Vibration did not appear to cause a problem with using the touchscreen. Gloves did present a problem in using the Projected Capacitive touchscreen.
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Causse, Mickael, Nourhen Amdouni, Rodríguez Ginés et Christophe Hurter. « Non-contact physiological monitoring of heart rate, facial temperature, and respiration rate with thermal and RGB cameras ». Dans 2024 AHFE International Conference on Human Factors in Design, Engineering, and Computing (AHFE 2024 Hawaii Edition). AHFE International, 2024. http://dx.doi.org/10.54941/ahfe1005731.
Texte intégralRésumé :
In this paper, we evaluated a non-contact physiological measurement technique using a thermal camera and an RGB camera aimed at the participant's face. The thermal camera effectively measured the temperature of specific facial regions, such as the tip of the nose, which is related to stress and mental workload. It also accurately measured respiration rate, which is an important indicator of mental state. On the other side, the RGB camera successfully measured heart rate by detecting subtle color changes in the face. However, the thermal camera was not effective in measuring heart rate, possibly due to a lack of thermal sensitivity and image resolution. Overall, our results confirmed that using thermal and RGB cameras can be a practical and discreet method for monitoring an individual's mental state. Additionally, these cameras can monitor movements and detect states of medical incapacitation, such as loss of consciousness.
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Senel, Numan, Shrivatsa Udupa et Gordon Elger. « Sensor Data Preprocessing in Road-Side Sensor Units ». Dans FISITA World Congress 2021. FISITA, 2021. http://dx.doi.org/10.46720/f2021-acm-120.
Texte intégralRésumé :
To improve safety, mitigate traffic congestion and to reduce pollution caused by vehicles, infrastructure-side sensors can be used, especially at critical locations in cities. In the future, infrastructural safeguarding has large potential, due to availability of advanced sensors (camera, radar, lidar) and vehicle-to-infrastructure(V2I) communications. Currently, camera-based systems are widely used to monitor traffic violations. A smart combination of multiple sensors like camera-RADAR or camera-LIDAR is used to determine the precise velocity and position of the traffic participants. In such scenarios RADAR/LIDAR will be responsible for detection of velocity or position and cameras will be used to identify the traffic participants, i.e. for object classification. However, processing of large amount of data is necessary at the sensor nodes. With the evolution of technology and availability of higher computational power, such systems will become affordable and smarter. Additional hardware can enable such systems to communicate with other traffic participants in order to increase safety and efficiency. Additional hardware and computational power will be limited due to cost overhead, size, weather conditions and power consumption limitations in the open-air roads. To mitigate such limitations, we have could-based solutions where data are acquired at the road side units but processed remotely in the cloud. Although it is a valid solution, it brings limitation regarding the required high bandwidth and is also a potential threat for data leaks, e.g. privacy and data security. To have a large detection range a camera imager needs to have a large chip area and high number of pixels. Therefore, the image size gets large even if the large number of pixels is not required for objects in short distance. In this paper an image pre-processing method is developed to reduce the sensor data size, which in turn reduces the computational power to process or the bandwidth to transmit the data. An increase of detection range is possible keeping the data size at an acceptable level. Reducing the sensor data size is a benefit and reduces the dependency of cloud-based solutions. Even in case of using a cloud-based solution, reduced data size will result in a lower network load, that increase overall performance of could base systems. In the paper, YOLO-V3 is used for object detection and classification of traffic participants. In Addition, the fixed installation of the camera in the infrastructure allows to apply methods for depth estimation when using only mono cameras. The improvement and accuracy of the depth estimation is benchmarked using data from RADAR and LiDAR sensors as ground truth, which are installed at the same sensor node as the camera, i.e. the data of Radar and LiDAR are fused to the camera data.
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Brewer, Ralph, Zachary Guyton, Tyler Long, Angela Vantreese, Mason Russell, Chad Kessens et Ericka Rovira. « Impact of Camera Perspective and Image Throughput on Human Trust of a Quadrupedal Robot Scout ». Dans 13th International Conference on Applied Human Factors and Ergonomics (AHFE 2022). AHFE International, 2022. http://dx.doi.org/10.54941/ahfe1001490.
Texte intégralRésumé :
The objective of this study is to understand user perceptions of robot behaviors. Specifically, we are interested in the possible effects of providing the user with different camera perspectives and with regular snapshots versus a continuous camera feed in the context of a small-unit military operation. The study will employ a mixed 2 (camera perspective: 1st person vs over the shoulder 3rd person) x 2 (camera feed: snapshots vs continuous) factorial design, with participants viewing a robot performing military tasks in both rural and urban operational settings. After viewing the robot’s performance, participants will answer performance questions based on the context of the military mission, as well as questionnaires that measure trust in the autonomous system. Dependent variables include performance outcomes from tactical performance questions and subjective results of the trust questionnaires. Data from participants will be analyzed with a 2x2 between subjects ANOVA. We anticipate that the findings will suggest that a third person perspective and continuous camera feed will result in the highest trust and best performance outcomes.
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Ninomiya, Yuina, Shima Okada, Masaaki Makikawa, Masanobu Manno, Yusuke Sakaue, Watanabe Tamami et Fukuda Yuko. « Automatic Classification of Infant Sleeping Postures Using an Infrared Camera ». Dans AHFE 2023 Hawaii Edition. AHFE International, 2023. http://dx.doi.org/10.54941/ahfe1004352.
Texte intégralRésumé :
The sleeping posture is crucial determinant of infant growth and development. Sleeping in the prone position is associated with a higher risk of sudden infant death syndrome. Therefore, medical recommendations advocate placing infants in the supine position during sleep. Furthermore, certain medical conditions, such as cranial deformity, hip dislocation, and torticollis, may manifest as head-turn preferences, wherein infants consistently face a specific direction, either right or left. Detecting and addressing these sleeping postures are critical for preventing accidental infant deaths during sleep and identifying potential underlying health issues. In this study, we present an automatic method for classifying infant sleeping postures into four categories: supine, prone, right lateral, and left lateral, using only videos. Although various methods exist for classifying sleeping postures during infancy, such as those involving acceleration and pressure seat sensors, they often require physical attachments that may cause discomfort to the infants. To address this limitation, we present a contactless approach that employs video images recorded using an infrared camera. The camera was positioned to record the entire infant bedding area without imposing restrictions on the installation angle. We analyzed the video data collected from the home of each participant and classified the sleeping postures of the participants into four categories. Subsequently, the classification accuracy was calculated for each night. The participants of the experiment were two infants under one year of age. To evaluate data accuracy, we excluded instances of data involving individuals other than the participants and data outside the field of view of the camera. “Vision Pose,” a skeleton estimation software capable of detecting joint points in images, was employed for body position analysis. Specifically, we extracted the two-dimensional coordinates of eight joint points: both shoulders, both elbows, both hips, shoulder center, and hip center. We classified the infant sleeping postures by measuring the distance between these joint points. A linear support vector machine was applied to the features, and classification was conducted in two steps. In the initial step, the sleep data were categorized into two groups: supine or prone and right lateral or left lateral. Subsequently, each of these categories was further divided into two classifications, yielding four types of sleeping postures. Our proposed model demonstrates an impressive average accuracy of 92.3% in estimating the four sleeping postures: supine, prone, right lateral, and left lateral. Our study establishes the feasibility of non-contact sleeping posture classification using an infrared camera. This approach holds promising potential for real-life home environments and childcare facilities, where continuous monitoring of infant sleeping postures can significantly contribute to promoting safe sleep practices and early identification of potential health concerns.
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Aoki, Hirotaka, Koji Morishita, Marie Takahashi, Rea Machida, Kousuke Hirata, Atsushi Kudoh et Tsuyoshi Shirai. « Elicitation of Diagnosis Strategy During Scanning Chest X-Rays from Eye Tracking Stimulated Retrospections ». Dans 13th International Conference on Applied Human Factors and Ergonomics (AHFE 2022). AHFE International, 2022. http://dx.doi.org/10.54941/ahfe1001605.
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In the present paper, we apply a debriefing technique aided by eye movement recordings to elicitation of clinical reasoning processes during chest x-rays diagnosis. It can be expected that this technique allows us to obtain elaborated information regarding hidden cognitive processes compared to conventional verbal protocol approach. Two experiments where medical tasks of 20 medical doctors (10 majoring in radiology/ respiratology and 10 majoring in surgery/acute medicine) on diagnosis of chest x-rays images were recorded with a video camera and an eye tracking system were performed. In the first experiment, each one of 5 chest x-rays having four patterns of cancer, pneumonia, normal and others were shown. A participant was asked to make his/her diagnosis decisions about whether each of chest x-rays. Immediately afterwards, a debriefing where each eye tracking recording was used as a cue to verbalize the participant’s implicit diagnosis processes was conducted. In the second experiment, a comparative diagnosis on the current patient’s status was carried out. Five pairs of x-rays images were shown to each participant. In each pair, one was a current image and the other one was an image taken a year ago. The participant examined the current patient’s status by identifying small changes with time. The debriefing stimulated by eye movement recordings was performed just after the task. Based on the verbal protocols form the debriefing session, each participant’s reasoning processes were traced. The results indicated that there were mainly four effective reasoning strategies as followings: Postponement of lung field interpretation, avoidance of preconception by applying redundant scanning rule, critical area revisited, and complying with one’s mental check-list at any moment. At the same time, one problematic strategy was also identified that can be named as “single lesion focusing strategy.” Based on all results as well as implications obtained, we discuss insights relating to effective medical reasoning processes as well as validity of verbal protocols/comments on eye mark recordings.
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Miasnikova, Marina, et Alexandra Trukhina. « Character, Author, Viewer of Documentaries in the Public Space of New Media ». Dans The Public/Private in Modern Civilization, the 22nd Russian Scientific-Practical Conference (with international participation) (Yekaterinburg, April 16-17, 2020). Liberal Arts University – University for Humanities, Yekaterinburg, 2020. http://dx.doi.org/10.35853/ufh-public/private-2020-54.
Texte intégralRésumé :
Any screen message usually comprises three components: life drama in the form of a story about a real person as the character; the author’s intention to create an artistic world containing footprints of the creative personality and the author’s concept; and the viewer’s mindset regarding this world. Thus, a screen document is created by three participants of communication: character, author, viewer, though each of them differently manifests itself in turbulent conditions of ongoing media-transformations. Under the new direction named ‘real’, ‘actual’, ‘horizontal’ cinema, the documentary screen is increasingly featuring a new hero: a private, ‘simple’ person who is easy to watch with a lightweight digital camera, and who himself, blurring the line between the personal and the public, does not mind picking up the camera for the purpose of self-presentation. The author has an opportunity to demonstrate his films on new media platforms. And the viewer participates in the creation of interactive documentaries. Thus, the article covers the essential and functional changes taking place with characters, authors, and viewers of modern documentaries as an open system at their transition (alongside this movie type itself) from the existence within the framework of old, conventional media (big-screen cinema and television) to relevant media platforms (social media, new media, mobile devices, etc.).
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Luigi Di Stasi, Leandro, Francesco Angioi, Marcelo Fernandes, Giulia De Cet, M. Jesus Caurcel, Kristina Stojmenova, Jaka Sodnik, Christophe Prat et Carolina Díaz Piedra. « The use of cardiac-based metrics to assess secondary task engagement during automated and manual driving : An experimental simulation study ». Dans AHFE 2023 Hawaii Edition. AHFE International, 2023. http://dx.doi.org/10.54941/ahfe1004334.
Texte intégralRésumé :
Most driver monitoring systems (DMS) rely on cameras facing the driver while detecting their gaze or head position. Both future automated driving (AD) in-vehicle interactions and AD vehicle interior designs (e.g., seating arrangement) might drastically reduce the effectiveness of such camera-based DMS solutions, however. Thus, alternative solutions that do not rely on cameras, and therefore compatible with upcoming AD journey experiences, are worth being investigated. Here, we studied the behavior of several cardiac-based indices. We aimed to determine the effects of engaging in non-driving-related tasks (NDRT) in a semi-dynamic driving simulator on heart rate and heart rate variability parameters (here, we report the standard deviation of R-R intervals [SDRR]). We developed a 2 (AD vs. manual driving [MD] modalities) by 2 (one-hand vs. two-hand concurrent Task modality) within-participants experimental design. Thirty-two expert drivers drove along two highway scenarios (∼ 22 minutes each) in daylight conditions. Each scenario included four distraction periods. In each distraction period, participants performed a concurrent task in addition to their main task (i.e., driving the simulator during MD, supervising the system during AD). We monitored participants’ cardiac activity and collected performance levels on the NDRT, driving performance, as well as subjective ratings of task load. Cardiac-based indices clearly differentiated Task modality, with the two-hand task inducing higher heart rate and SDRR. Driving modality (MD vs. AD) only influenced heart rate, which increased during MD. Driving performance and subjective ratings, as well as performance on the NDRT, were able to reflect the experimental manipulation, with the two-hand concurrent task (in MD) being the most disruptive and demanding condition. Overall, these findings have the potential to improve future DMS design and road safety by providing accurate measurements of driver engagement. They can be key to assess future driver-vehicle interactions using for example, non-contact, more realistic, heart-rate radar-based sensor solutions.
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Shi, Gaby, et Kit Lun Yick. « Evaluating the Impact of Prosthetics on Gait Symmetry in Unilateral Lower Limb Amputees ». Dans 15th International Conference on Applied Human Factors and Ergonomics (AHFE 2024). AHFE International, 2024. http://dx.doi.org/10.54941/ahfe1004866.
Texte intégralRésumé :
Gait symmetry is a primary criterion for assessing the rehabilitation progress of unilateral transtibial amputees with prostheses. This study aimed to examine the gait symmetry of dynamic kinematic and kinetic functions in unilateral transtibial amputees using prostheses during walking. Methods The study was approved by the University Ethics Committee and involved five (3 females and 2 males) unilateral transtibial amputees (age: (mean ± SD) 63.4 ± 7.7 years, height: 165.6 ± 6.4 cm; body mass: 69.4 ± 4.1 kg; years of using prosthetic foot: 30.8 ± 9.3 years). For collecting the kinematic and kinetic data, thirty-nine passive-reflective markers were placed on the participant according to the landmarks set of the plug-in full body model. An 8-camera motion capturing system (VICON, Nexus 2.0 Inc., Oxford, UK) and 2 force plates (AMTI, Advanced Mechanical Technology, Inc., Watertown, USA) mounted under the walkway were recorded 100 frames per second simultaneously. All the systems were calibrated before the experiment. Participants walked at their self-selected walking speeds. Based on their self-selected walking speed record, ± 10% range were calculated as the references for each participant’s fast and slow walking speed. Each participant repeated walking trials until a minimum of 5 “clean” foot force plate contact with both right and left limbs were acquired. The corresponding data from 5 gait cycles were selected to calculate the lower limb joints angles and vertical ground reaction force (GRF) during walk. Then symmetry index (SI) was calculated to provide a descriptive marker for the degree of symmetry between the intact and residual limbs. A value of SI less than 5% reflects good symmetry between the limbs, whereas increasingly positive values indicate the value for the residual limb was greater than that of the intact limb, while negative values denote that the intact limb value was greater. Results Normalized vertical GRF of two limbs increased with increased walking speeds. The corresponding SI was the largest when heel strike with slow walking speed (6.2 ± 0.8 m/s). Gait imbalance was observed during loading response and midstance (around 30% - 45% stance phase) when the walking speed was increased. While SI values of ankle angles were enlarged with increased walking speed, indicating more asymmetry of ankle angle between two limbs with their traditional prostheses when the walking speed increases. Conclusions The current prostheses can only support the basic daily activities for the unilateral transtibial amputees. The new design of prostheses should therefore focus on kinetic and kinematic parameters such as the symmetry between the residual limb and the intact limb, and energy saving for the amputees during high intensity activities.
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Gao, Jialin, Bill Ong, Darld Lwi, Zhen Hao Ng, Xun Wei Yee, Mun-Thye Mak, Wee Siong Ng et al. « From 2D to 3D : AISG-SLA Visual Localization Challenge ». Dans Thirty-Third International Joint Conference on Artificial Intelligence {IJCAI-24}. California : International Joint Conferences on Artificial Intelligence Organization, 2024. http://dx.doi.org/10.24963/ijcai.2024/1003.
Texte intégralRésumé :
Research in 3D mapping is crucial for smart city applications, yet the cost of acquiring 3D data often hinders progress. Visual localization, particularly monocular camera position estimation, offers a solution by determining the camera's pose solely through visual cues. However, this task is challenging due to limited data from a single camera. To tackle these challenges, we organized the AISG–SLA Visual Localization Challenge (VLC) at IJCAI 2023 to explore how AI can accurately extract camera pose data from 2D images in 3D space. The challenge attracted over 300 participants worldwide, forming 50+ teams. Winning teams achieved high accuracy in pose estimation using images from a car-mounted camera with low frame rates. The VLC dataset is available for research purposes upon request via vlc-dataset@aisingapore.org.
Rapports d'organisations sur le sujet "Caméra participante"
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Balali, Vahid, Arash Tavakoli et Arsalan Heydarian. A Multimodal Approach for Monitoring Driving Behavior and Emotions. Mineta Transportation Institute, juillet 2020. http://dx.doi.org/10.31979/mti.2020.1928.
Texte intégralRésumé :
Studies have indicated that emotions can significantly be influenced by environmental factors; these factors can also significantly influence drivers’ emotional state and, accordingly, their driving behavior. Furthermore, as the demand for autonomous vehicles is expected to significantly increase within the next decade, a proper understanding of drivers’/passengers’ emotions, behavior, and preferences will be needed in order to create an acceptable level of trust with humans. This paper proposes a novel semi-automated approach for understanding the effect of environmental factors on drivers’ emotions and behavioral changes through a naturalistic driving study. This setup includes a frontal road and facial camera, a smart watch for tracking physiological measurements, and a Controller Area Network (CAN) serial data logger. The results suggest that the driver’s affect is highly influenced by the type of road and the weather conditions, which have the potential to change driving behaviors. For instance, when the research defines emotional metrics as valence and engagement, results reveal there exist significant differences between human emotion in different weather conditions and road types. Participants’ engagement was higher in rainy and clear weather compared to cloudy weather. More-over, engagement was higher on city streets and highways compared to one-lane roads and two-lane highways.
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Semerikov, Serhiy O., Mykhailo M. Mintii et Iryna S. Mintii. Review of the course "Development of Virtual and Augmented Reality Software" for STEM teachers : implementation results and improvement potentials. [б. в.], 2021. http://dx.doi.org/10.31812/123456789/4591.
Texte intégralRésumé :
The research provides a review of applying the virtual reality (VR) and augmented reality (AR) technology to education. There are analysed VR and AR tools applied to the course “Development of VR and AR software” for STEM teachers and specified efficiency of mutual application of the environment Unity to visual design, the programming environment (e.g. Visual Studio) and the VR and AR platforms (e.g. Vuforia). JavaScript language and the A-Frame, AR.js, Three.js, ARToolKit and 8th Wall libraries are selected as programming tools. The designed course includes the following modules: development of VR tools (VR and Game Engines; physical interactions and camera; 3D interface and positioning; 3D user interaction; VR navigation and introduction) and development of AR tools (set up AR tools in Unity 3D; development of a project for a photograph; development of training materials with Vuforia; development for promising devices). The course lasts 16 weeks and contains the task content and patterns of performance. It is ascertained that the course enhances development of competences of designing and using innovative learning tools. There are provided the survey of the course participants concerning their expectations and the course results. Reduced amounts of independent work, increased classroom hours, detailed methodological recommendations and increased number of practical problems associated with STEM subjects are mentioned as the course potentials to be implemented.
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Bäumler, Maximilian, Madlen Ringhand, Christian Siebke, Marcus Mai, Felix Elrod et Günther Prokop. Report on validation of the stochastic traffic simulation (Part B). Technische Universität Dresden, 2021. http://dx.doi.org/10.26128/2021.243.
Texte intégralRésumé :
This document is intended to give an overview of the validation of the human subject study, conducted in the driving simulator of the Chair of Traffic and Transportation Psychology (Verkehrspsychologie – VPSY) of the Technische Universität Dresden (TUD), as well of the validation of the stochastic traffic simulation developed in the AutoDrive project by the Chair of Automotive Engineering (Lehrstuhl Kraftfahrzeugtechnik – LKT) of TUD. Furthermore, the evaluation process of a C-AEB (Cooperative-Automatic Emergency Brake) system is demonstrated. The main purpose was to compare the driving behaviour of the study participants and the driving behaviour of the agents in the traffic simulation with real world data. Based on relevant literature, a validation concept was designed and real world data was collected using drones and stationary cameras. By means of qualitative and quantitative analysis it could be shown, that the driving simulator study shows realistic driving behaviour in terms of mean speed. Moreover, the stochastic traffic simulation already reflects reality in terms of mean and maximum speed of the agents. Finally, the performed evaluation proofed the suitability of the developed stochastic simulation for the assessment process. Furthermore, it could be shown, that a C-AEB system improves the traffic safety for the chosen test-scenarios.