A standard-compliant virtual meeting system with active video object tracking

Authors:
Chia-Wen Lin;Yao-Jen Chang;Chih-Ming Wang;Yung-Chang Chen;Ming-Ting Sun
Affiliations:
Department of Computer Science and Information Engineering, National Chung Cheng University, Chiayi, Taiwan;Department of Electrical Engineering, National Tsing Hua University, Hsinchu, Taiwan;Department of Electrical Engineering, National Tsing Hua University, Hsinchu, Taiwan;Department of Electrical Engineering, National Tsing Hua University, Hsinchu, Taiwan;Information Processing Laboratory, University of Washington, Seattle, WA
Venue:
EURASIP Journal on Applied Signal Processing
Year:
2002

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Abstract

This paper presents an H.323 standard compliant virtual video conferencing system. The proposed system not only serves as a multipoint control unit (MCU) for multipoint connection but also provides a gateway function between the H.323 LAN (local-area network) and the H.324 WAN (wide-area network) users. The proposed virtual video conferencing system provides user-friendly object compositing and manipulation features including 2D video object scaling, repositioning, rotation, and dynamic bit-allocation in a 3D virtual environment. A reliable, and accurate scheme based on background image mosaics is proposed for real-time extracting and tracking foreground video objects from the video captured with an active camera. Chroma-key insertion is used to facilitate video objects extraction and manipulation.We have implemented a prototype of the virtual conference system with an integrated graphical user interface to demonstrate the feasibility of the proposed methods.