Changsong Shen

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In this paper, we propose a multi-camera video surveillance system with automatic camera selection. A new confidence measure, quality-of-view (QOV), is defined to automatically evaluate the camera's view performance for each time instant. This measure takes into account view angle and distance from subjects. By comparing each camera's QOVs, the system can(More)
This paper describes the architecture of a remote low-cost position sensing infrastructure for ubiquitous computing. To reduce the cost, each tracked object carries an inexpensive active tag that emits a modulated near-infrared signal, which is received and decoded by a camera module. Each camera module consists of a CMOS camera connected to a Field(More)
This paper presents our progress on OpenVL -a novel software architecture to address efficiency through facilitating hardware acceleration, reusability and scalability for computer vision. A logical image understanding pipeline is introduced to allow parallel processing. As well, we discuss our middleware -VLUT that enables applications to operate(More)
Meeting constraints for real-time performance is a main issue for computer vision, especially for embedded computer vision systems. This chapter presents our progress on our open vision library (OpenVL), a novel software architecture to address efficiency through facilitating hardware acceleration, reusabil-ity, and scalability for computer vision systems.(More)
This paper presents an Open Source Vision Library (OpenVL) for hardware acceleration of video-based surveillance systems and other computer vision applications to facilitate low latency, real-time response. Our approach is inspired by the success of OpenGL in promoting the development of hardware acceleration for computer graphics. Our goal is to create(More)
The Human Communication Technologies Laboratory is building an ongoing project called " Mixing Shadows into Video Imagery ". The project captures silhouettes of moving objects which will be positioned on previously recorded backgrounds to produce an interactive video artwork. Human tracking systems are popular research topics in computer vision industries.(More)
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