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Aperture Supervision for Monocular Depth Estimation 31

Aperture Supervision for Monocular Depth Estimation

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31st IEEE/CVF conference on computer Vision and Pattern Recognition (CVPR)

作者： Srinivasan, Pratul P. Garg, Rahul Wadhwa, Neal Ng, Ren Barron, Jonathan T. Univ Calif Berkeley Berkeley CA 94720 USA Google Res Mountain View CA USA

ISBN: (纸本)9781538664209

We present a novel method to train machine learning algorithms to estimate scene depths from a single image, by using the information provided by a camera's aperture as supervision. Prior works use a depth sensor's outputs or images of the same scene from alternate viewpoints as supervision, while our method instead uses images from the same viewpoint taken with a varying camera aperture. To enable learning algorithms to use aperture effects as supervision, we introduce two differentiable aperture rendering functions that use the input image and predicted depths to simulate the depth-of-field effects caused by real camera apertures. We train a monocular depth estimation network end-to-end to predict the scene depths that best explain these finite aperture images as defocus-blurred renderings of the input all-in-focus image.

关键词： Apertures Cameras Rendering (computer graphics) Estimation Geometry Prediction algorithms Three-dimensional displays

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4D Human Body Correspondences from Panoramic Depth Maps 31

4D Human Body Correspondences from Panoramic Depth Maps

引用

31st IEEE/CVF conference on computer Vision and Pattern Recognition (CVPR)

作者： Li, Zhong Wu, Minye Zhou, Wangyiteng Yu, Jingyi Univ Delaware Newark DE 19716 USA ShanghaiTech Univ Shanghai Peoples R China

ISBN: (纸本)9781538664209

The availability of affordable 3D full body reconstruction systems has given rise to free-viewpoint video (FVV) of human shapes. Most existing solutions produce temporally uncorrelated point clouds or meshes with unknown point/vertex correspondences. Individually compressing each frame is ineffective and still yields to ultra-large data sizes. We present an end-to-end deep learning scheme to establish dense shape correspondences and subsequently compress the data. Our approach uses sparse set of "panoramic" depth maps or PDMs, each emulating an inward-viewing concentric mosaics (CM)[45]. We then develop a learning-based technique to learn pixel-wise feature descriptors on PDMs. The results are fed into an autoencoder-based network for compression. Comprehensive experiments demonstrate our solution is robust and effective on both public and our newly captured datasets.

关键词： Three-dimensional displays Shape Training Reliability Cameras Rendering (computer graphics) Solid modeling

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The Effects of Viewing Formats and Song Genres on Audience Experiences in Virtual Avatar Concerts 23

The Effects of Viewing Formats and Song Genres on Audience E...

引用

31st ACM International conference on Multimedia (MM)

作者： Lee, Sebin Kim, Daye Lee, Jungjin Soongsil Univ Global Sch Media Seoul South Korea

ISBN: (纸本)9798400701085

With the recent advancements in multimedia and computer graphics technology, virtual avatar concerts have become increasingly popular among both well-known celebrities and subculture-based virtual YouTubers, attracting large audiences. Although this new form of performance art can be delivered through various platforms that use different viewing formats, research on the components of enjoying virtual avatar concerts and their effects on the audience experience is lacking. This study aims to explore the effects of different viewing formats and song genres on sickness, presence, and immersion and identify preferences for enjoying virtual avatar concerts. We first analyzed data from 64 virtual avatar concert cases to identify the most commonly used viewing media, methods, and song genres. Based on our analysis, we designed and conducted a user experiment with four virtual avatar concert scenarios. The experiment compared two viewing methods (audience's point of view and director's edited view) and two song genres (dance and ballad) for 2D display and a head-mounted display. The results show that the audience's point of view and a dance song can be advantageous in increasing the immersive experience irrespective of the viewing medium. Furthermore, the participants show different expectations regarding performances according to song genres. We discuss these findings and propose guidelines to help design and conduct virtual avatar concerts effectively.

关键词： VR concerts virtual avatar concerts concert experience human-computer interaction user studies

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Heuristics for evaluating multi-touch gestures in mobile applications 31

Heuristics for evaluating multi-touch gestures in mobile app...

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31st International BCS Human computer Interaction conference: Digital Make Believe, HCI 2017

作者： Humayoun, Shah Rukh Chotala, Paresh Hamirbhai Bashir, Muhammad Salman Ebert, Achim Computer Graphics HCI Group University of Kaiserslautern Kaiserslautern67663 Germany Department of Computer Science Virtual University of Pakistan Lahore Pakistan

Multi-touch gesture interaction is one of the main features that differentiate the current smart mobile era from the desktop-computing era. Heuristic evaluation is a popular usability evaluation method, mainly due to being less time-consuming, more cost effective, and applicable to different stages of the design and development phases. Researchers have provided their own sets of heuristics targeting domain specific mobile applications or some specific features (e.g., contextual behaviour). In this work, we specifically target evaluating multi-touch gestures in mobile apps through a set of 15 heuristics, which we selected after analysing previously proposed sets of heuristics. However, we adjusted these selected heuristics to make them appropriate for evaluating multi-touch gestures. We conducted a preliminary study with five evaluators in which they were able to find out more usability problems related to multi-touch gestures in the used mobile app compared to a previously proposed heuristics set for mobile apps. © Humayoun et al. Published by BCS Learning and Development Ltd.

关键词： Heuristic methods

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ACM International conference Proceeding Series

ACM International Conference Proceeding Series

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31st International conference on computer Animation and Social Agents, CASA 2018

ISBN: (纸本)9781450363761

The proceedings contain 18 papers. The topics discussed include: towards a generic framework for multi-party dialogue with virtual humans;increasing the feeling of social presence by incorporating realistic interactions in multi-party VR;learning to communicate via supervised attentional message processing;socio-cultural effects of virtual counseling interviewers as mediated by smartphone video conferencing;an image representation for the 3D face synthesis;and saliency detection by aggregating complementary background template with foreground information.

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Conservative out-of-core rendering of large dynamic scenes using HDLODs 31

Conservative out-of-core rendering of large dynamic scenes u...

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31st International conference on computer graphics and Vision, GraphiCon 2021

作者： Semenov, Vitaly Shutkin, Vasily Zolotov, Vladislav Ivannikov Institute for System Programming of the Russian Academy of Sciences Alexander Solzhenitsyn st. 25 Moscow109004 Russia Moscow Institute of Physics and Technology 9 Institutskiy per. Dolgoprudny141701 Russia National Research University Higher School of Economics 11 Pokrovsky Bulvar Moscow109028 Russia

Rendering of large scenes in external memory is one of the most important problems of computer graphics, which is used in such areas as CAD/CAM/CAE, geoinformatics, project management, scientific visualization, virtual and augmented reality, computer games and animation. Unlike static scenes, for which a number of effective approaches have been proposed, in particular, levels of detail (LOD), rendering of large dynamic scenes with a given level of the tolerance and trustworthiness remains a big challenge. This paper discusses and investigates the possibility of using the previously proposed method of hierarchical dynamic levels of detail (HDLOD) for conservative rendering of dynamic scenes with a deterministic nature of events in external memory. The carried out series of computational experiments prove the feasibility and effectiveness of the method for real industrial scenes when employed in combination with memory management techniques. © 2021 Copyright for this paper by its authors.

关键词： computer games

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Understanding user requirements and expectations for car/ride sharing smartwatch apps 31

Understanding user requirements and expectations for car/rid...

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31st International BCS Human computer Interaction conference: Digital Make Believe, HCI 2017

作者： Humayoun, Shah Rukh Rath, Priya AlTarawnen, Ragaad Ebert, Achim Computer Graphics and HCI Group University of Kaiserslautern Kaiserslautern67663 Germany Information Technology Department Mutah University Al Karak Jordan

Car/ride sharing concepts are getting more and more popular, mainly due to the more economical and environment-friendly nature. Most of the popular car/ride service providers offer specialized mobile apps so that users can access their services anywhere anytime. Recently, few of these providers have also launched smartwatch apps for a quick and flexible access. Due to the new medium and the given constrains of smartwatches (e.g., small size, dependency on mobile, etc.), user studies are needed to be done in order to properly find out user requirements and expectations. In this work, we conducted three surveys (to find out user requirements and expectations) and a two-months long study with two users (to get user experience feedback over a long period of time).The feedbacks of these surveys and the user study can help researchers and designers in making design and development decisions for future versions of this kind of apps. © Humayoun et al. Published by BCS Learning and Development. Proceedings of British HCI 2017-Digital Make-Believe, Sunderland, UK.

关键词： Surveys

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computer graphics in lighting engineering education: Teaching photometry and the basics of the light field 31

Computer graphics in lighting engineering education: Teachin...

引用

31st International conference on computer graphics and Vision, GraphiCon 2021

作者： Budak, Vladimir Makarov, Denis National Research University "MPEI" Krasnokazarmennaya st. 14 Moscow111250 Russia Lighting engineering company LLC "Vidno" Moscow111622 Russia

The modern level of computer graphics programs (CGP) has long been able to solve most design, architecture, and lighting design problems. However, the use of CGP in teaching students is still underestimated. The existing traditional teaching methods cannot effectively teach the basics of lighting engineering and photometry to students. This is especially true for the concepts of illumination that are difficult to understand – luminance (radiance), color temperature. The article offers a method of teaching photometry based on the wide use of CGP. Within the methodology framework, 3D laboratories were developed. students can study the basics of lighting engineering and optical effects, visually observe most lighting quantities, see their relationship, and interact with the surrounding space and objects. More than ten 3D training models on interior, architectural, and road lighting have been modeled. Within each model, students are given tasks for independent work. Checking the received material from students at several leading Russian universities allowed us to conclude on the methodology's effectiveness and outline many key aspects of its development. © 2021 Copyright for this paper by its authors.

关键词： Lighting

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IHM 2019 - Actes de la 31e conference Francophone sur l'Interaction Homme-Machine

IHM 2019 - Actes de la 31e Conference Francophone sur l'Inte...

引用

31e conference Francophone sur l'Interaction Homme-Machine, IHM 2019 - 31st French-speaking conference on Human-computer Interaction, IHM 2019

ISBN: (纸本)9781450370264

The proceedings contain 14 papers. The topics discussed include: reducing error aversion to support novice-to-expert transitions with FastTap;tactile and kinesthetic feedbacks improve distance perception in virtual reality;which tangible control for which visual task?;multi-evaluation of pointing and application to dyspraxia evaluation;mulsebox: a new multisensorial interaction device;training road crossing skills for young people with intellectual disabilities using virtual reality - a feasibility study;holding patterns: detecting handedness with a moving smartphone at pickup;and vibrotactile cues for conveying directional information during blind exploration of digital graphics.

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MoCon-VR: Motion control in mobile virtual realty applications through smartwatches 31

MoCon-VR: Motion control in mobile virtual realty applicatio...

引用

31st International BCS Human computer Interaction conference: Digital Make Believe, HCI 2017

作者： Humayoun, Shah Rukh Hussain, Jawad Toubaji, Muhamad Yasser Khan, Taimur Ebert, Achim Computer Graphics and HCI Group University of Kaiserslautern Kaiserslautern67663 Germany

The high processing capabilities of current smartphones and the availability of wearable Virtual Reality (VR) toolkits make it possible for normal users to use VR environments on go for gaming or learning. However, users normally need to use their head movement for interacting or moving the objects inside these VR environments. This can cause the dizzy and nauseas feelings amongst the users as well as neck/head muscle tiredness effect, which restrict them to use it for longer time. Targeting this problem, we propose to use the 3D accelerometer inside the current smartwatches. In this way, users would easily interact or control the movement inside the mobile VR environment through their wrist movement. For this purpose, we built MoCon-VR framework that provides the motion control in Google Cardboard-based mobile VR environment through smartwatch's 3D accelerometer sensor. A preliminary conducted study with 10 participants shows less dizzy and nausea feelings amongst the participants as well as less neck/head muscle pains, in compared to the standard head-movement-based approach. © 2017 Humayoun et al.

关键词： Cardboard

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