Multiple view geometry in computer visiond
Multiple view geometry in computer visiond
Tracking and modeling people in video sequences
Computer Vision and Image Understanding - Modeling people toward vision-based underatanding of a person's shape, appearance, and movement
The Visual Hull Concept for Silhouette-Based Image Understanding
IEEE Transactions on Pattern Analysis and Machine Intelligence
Use of video shadow for small group interaction awareness on a large interactive display surface
AUIC '03 Proceedings of the Fourth Australasian user interface conference on User interfaces 2003 - Volume 18
Shadow communication: system for embodied interaction with remote partners
CSCW '04 Proceedings of the 2004 ACM conference on Computer supported cooperative work
Digital Selves: Devices for intimate communications between homes
Personal and Ubiquitous Computing
Teleshadow: feeling presence in private spaces
ACM SIGGRAPH 2007 sketches
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In some visual communication applications it is not possible or even desired to aim at a photorealistic representation of the remote person. One possibility is to aim at stylized visual representations of remote persons, e.g., as avatars shown on a display device or as shadows in lighting. In this paper we introduce a system for persistent and ambient visual communication based on capture, transmission, and rendering of 3D shadow representations of users. The shape of a person is captured using a distributed camera array, compressed, and transmitted over the network. In the receiving end the shape is projected as a shadow on a surface using a lighting device. We demonstrate that the 3D representation of the shape makes it possible to control the 2D visualization at the receiving end in many interesting ways. For example, when controlled by tracking of the observing user the shadow may create a visual illusion of a 3D shape on the wall.