Background Over the past few years, the world has witnessed an unprecedented growth in smartphone use. With sensors such as accelerometers and gyroscopes on board, smartphones have the potential to enhance our understanding of health... more
Background Over the past few years, the world has witnessed an unprecedented growth in smartphone use. With sensors such as accelerometers and gyroscopes on board, smartphones have the potential to enhance our understanding of health behavior, in particular physical activity or the lack thereof. However, reliable and valid activity measurement using only a smartphone in situ has not been realized.
ABSTRACT Both comparative category rating (CCR) and degradation category rating (DCR) methods [20] have been heavily employed in the subjective evaluations of media systems. The resulting metrics, comparative mean-opinion-score (CMOS) and... more
ABSTRACT Both comparative category rating (CCR) and degradation category rating (DCR) methods [20] have been heavily employed in the subjective evaluations of media systems. The resulting metrics, comparative mean-opinion-score (CMOS) and degradation mean-opinion-score (DMOS), can be used to describe the system subjective quality. However, the subjective metrics may work unsuccessfully when the variance of participant votes is large.
Abstract Voice communication systems such as Voice-over IP (VoIP), Public Switched Telephone Networks, and Mobile Telephone Networks, are an integral means of human tele-interaction. These systems pose distinctive challenges due to their... more
Abstract Voice communication systems such as Voice-over IP (VoIP), Public Switched Telephone Networks, and Mobile Telephone Networks, are an integral means of human tele-interaction. These systems pose distinctive challenges due to their unique characteristics such as low volume, burstiness and stringent delay/loss requirements across heterogeneous underlying network technologies.
Abstract ITU-T G. 1070 [7] is widely cited for evaluating the subjective quality of the video conferencing, but its findings cannot be applied to the tele-immersion. The reasons are two fold. First, a tele-immersive system offers end... more
Abstract ITU-T G. 1070 [7] is widely cited for evaluating the subjective quality of the video conferencing, but its findings cannot be applied to the tele-immersion. The reasons are two fold. First, a tele-immersive system offers end users an unmatched realistic and immersive experience by allowing them to collaborate in the joint virtual space. Second, the human activities in the shared space are not limited to the conferencing conversation.
Abstract This paper presents a psychophysical study that measures the perceptual thresholds of a new factor called Color-plus-Depth Level-of-Detail peculiar to polygon-based 3D tele-immersive video. The results demonstrate the existence... more
Abstract This paper presents a psychophysical study that measures the perceptual thresholds of a new factor called Color-plus-Depth Level-of-Detail peculiar to polygon-based 3D tele-immersive video. The results demonstrate the existence of Just Noticeable Degradation and Just Unacceptable Degradation thresholds on the factor. In light of the results, we describe the design and implementation of a real-time perception-based quality adaptor for 3D tele-immersive video.
Abstract The study of 3D Tele-immersion impact on remote collaborative work represents a very interesting and challenging research topic. In this paper, we introduce the latest accomplishments of TEEVE research which merges computer... more
Abstract The study of 3D Tele-immersion impact on remote collaborative work represents a very interesting and challenging research topic. In this paper, we introduce the latest accomplishments of TEEVE research which merges computer science with dance choreography. This collaborative research model is ideal for creative, interdisciplinary problem solving. TEEVE offers an entirely new interface for dance choreography as a creative tool and alternative performance venue.
Abstract Current interactive tele-presence systems are designed and optimized for one particular type of cyber-physical activity such as conversation, video chat, or gaming. However, with the emerging new 3D tele-immersive (TI) systems,... more
Abstract Current interactive tele-presence systems are designed and optimized for one particular type of cyber-physical activity such as conversation, video chat, or gaming. However, with the emerging new 3D tele-immersive (TI) systems, such as our own TI system, called TEEVE (TEle-immersion for EVErybody), we observe that the same TI system platform is being used for very different activities.
Abstract As computational power increases, tele-immersive applications are an emerging trend. These applications make extensive demands on computational resources through their heavy use of real-time 3D reconstruction algorithms. Since... more
Abstract As computational power increases, tele-immersive applications are an emerging trend. These applications make extensive demands on computational resources through their heavy use of real-time 3D reconstruction algorithms. Since computer vision developers do not necessarily have parallel programming expertise, it is important to give them the tools and capabilities to naturally express computer vision algorithms, yet retain high efficiency by exploiting modern GPU and large-scale multi-core platforms.
Abstract In this demonstration, we present two 3D tele-immersive games: light-saber dual and block fencing that merge 3D video representations of participants in real-time to enable remote interactions in a virtual world. The light-saber... more
Abstract In this demonstration, we present two 3D tele-immersive games: light-saber dual and block fencing that merge 3D video representations of participants in real-time to enable remote interactions in a virtual world. The light-saber dual arranges participants in a symmetric setup where both participants interact with each other in a virtual world with similar goals. On the other hand, the block fencing creates an asymmetric setup where participants interact with virtual objects having different goals.
Abstract 3D tele-immersion (3DTI) has the potential of enabling virtual reality interaction among remote people with real-time 3D video. However, today's 3DTI systems still suffer from various performance issues, limiting their broader... more
Abstract 3D tele-immersion (3DTI) has the potential of enabling virtual reality interaction among remote people with real-time 3D video. However, today's 3DTI systems still suffer from various performance issues, limiting their broader deployment, due to the enormous demand on temporal (computing) and spatial (networking) resources. Past research focused on system-centric approaches for technical optimization, without taking human users into the loop.
Abstract: Both comparative category rating (CCR) and degradation category rating (DCR) methods have been heavily employed in the subjective evaluations of media systems. The resulting metrics, comparative mean-opinion-score (CMOS) and... more
Abstract: Both comparative category rating (CCR) and degradation category rating (DCR) methods have been heavily employed in the subjective evaluations of media systems. The resulting metrics, comparative mean-opinion-score (CMOS) and degradation mean-opinion-score (DMOS), can be used to describe the system subjective quality. However, the subjective metrics may work unsuccessfully when the variance of participant votes is large.
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Abstract Copyright is held by the author/owner (s). Presented at: Supporting creative acts beyond dissemination. Creativity & Cognition 2007, June 13, 2007, Washington DC, USA In this position... more
Abstract Copyright is held by the author/owner (s). Presented at: Supporting creative acts beyond dissemination. Creativity & Cognition 2007, June 13, 2007, Washington DC, USA In this position paper we present a symbiotic creative system, consisting of creative dance choreographers and 3D tele-immersive environment (TI) technologists feeding off each other in terms of creativity and innovation. We will discuss this symbiotic relationship within the context of Creative Systems Theory by Charles M. Johnston. We will show how TI ' ...