Anahita: A System for 3D Video Streaming with Depth Customization

Producing high-quality stereoscopic 3D content requires significantly more effort than preparing regular video footage. In order to assure good depth perception and visual comfort, 3D videos need to be carefully adjusted to specific viewing conditions before they are shown to viewers. While most stereoscopic 3D content is designed for viewing in movie theaters, where viewing conditions do not vary significantly, adapting the same content for viewing on home TV-sets, desktop displays, laptops, and mobile devices requires additional adjustments. To address this challenge, we propose a new system for 3D video streaming that provides automatic depth adjustments as one of its key features. Our system takes into account both the content and the display type in order to customize 3D videos and maximize their perceived quality. We propose a novel method for depth adjustment that is well-suited for videos of field sports such as soccer, football, and tennis. Our method is computationally efficient and it does not introduce any visual artifacts. We have implemented our 3D streaming system and conducted two user studies, which show: (i) adapting stereoscopic 3D videos for different displays is beneficial, and (ii) our proposed system can achieve up to 35% improvement in the perceived quality of the stereoscopic 3D content

A Cross-Media Presence Questionnaire: The ITC-Sense of Presence Inventory

The presence research community would benefit from a reliable and valid cross-media presence measure that allows results from different laboratories to be compared and a more comprehensive knowledge base to be developed. The ITC-Sense of Presence Inventory (ITC-SOPI) is a new state questionnaire measure whose development has been informed by previous research on the determinants of presence and current self-report measures. It focuses on users' experiences of media, with no reference to objective system parameters. More than 600 people completed the ITC-SOPI following an experience with one of a range of noninteractive and interactive media. Exploratory analysis (principal axis factoring) revealed four factors: Sense of Physical Space, Engagement, Ecological Validity, and Negative Effects. Relations between the factors and the consistency of the factor structure with others reported in the literature are discussed. Preliminary analyses described here demonstrate that the ITC-SOPI is reliable and valid, but more rigorous testing of its psychometric properties and applicability to interactive virtual environments is required. Subject to satisfactory confirmatory analyses, the ITC-SOPI will offer researchers using a range of media systems a tool with which to measure four facets of a media experience that are putatively related to presence

Aesthetiography : The next Milestone in the Confluence of Media

Art and technology always evolved simultaneously, often inspiring and complimenting each other. This can be observed at every point in the history of media technologies. We suggest that the evolution of media has always been looking forward to an ultimate form of representation of reality that one could experience - a perfect Simulated Reality. Over the years the forms of media have been evolving and improving in order to create stronger perceptual as well as psychological illusions. Today virtual reality and associated technologies help evoke illusion of reality strong enough to make one believe to be entirely immersed and present in an artificial world. Observing these developments, we believe that the distinct goal of tomorrow’s media would be to create a perfect experience of perceptual illusion with the help of multisensory mediation. In this pursuit of an ultimate representational media, different media technologies will converge. This meeting point of cinema, virtual reality and associated new-media technologies in the near future, is what we would like to refer to as ‘Aesthetiography’ - the art and science of capturing (or creating) and reproducing an absolute perceptual experience. We propose that it would be the next milestone in the confluence of media

Affordable Low Cost Optical Tracking for VR

A low-cost optical tracking system can lead the way to affordable realism and provide an alternative communication interface to conventional user-computer interaction methodologies. The main aim of this project was to prove that it is possible to create a low-cost optical tracking system that is easy to use, provides a high level of accuracy and has low latency Although many optical tracking systems exist today, their high cost leaves such technology out of reach of many people. By aiming to reduce the cost of the system to as low as a couple of hundred rand, this project aims to make optical tracking technology available to a wide variety of users

Descriptive quality of experience for mobile 3D video

ilmenau.de} Perceptual quality evaluation experiments are used to assess the excellence of multimedia quality. However, these studies disregard qualitative experiential descriptions, interpretations, and impressions of quality. The goal of this paper is to identify general descriptive characteristics of experienced quality of 3D video on mobile devices. We conducted five studies in which descriptive data was collected after the psychoperceptual quality evaluation experiment. Qualitative semi-structured interviews and written attribute description tasks were conducted with over 90 naïve participants. The experiments contained an extensive and heterogeneous set of produced quality by varying content, level of depth, compression and transmission parameters, and audio and display factors for 3D. The results showed that quality of experience is constructed from four main components, 1) visual quality, 2) viewing experience, 3) content, and 4) quality of other modalities and their interactions. Author Keywords Quality perception, quality of experience, multimedia, 3

植物由来の刺激が生理応答に及ぼす影響

研究科: 千葉大学大学院園芸学研究科学位:千大院園博乙第農25号博士(農学)千葉大