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Development of a Low-cost Monocular PSD Motion Capture System with Two Active Markers at Fixed Distance  

Seo, Pyeong-Won (Dept. of Electronic Eng. Sunmoon University)
Kim, Yu-Geon (Dept. of Electronic Eng. Sunmoon University)
Han, Chang-Ho (Dept. of Electronic Eng. Sunmoon University)
Ryu, Young-Kee (Dept. of Infor. & Comm. Sunmoon University)
Oh, Choon-Suk (Dept. of Infor. & Comm. Sunmoon University)
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Abstract
In this paper, we propose a low-cost and compact motion capture system which enables to play motion games in PS2(Play Station 2). Recently, motion capture systems which are being used as a part in film producing and making games are too expensive and enormous systems. Now days, motion games using common USB camera are slow and have two-dimension recognition. But PSD sensor has a few good points, such as fast and low-cost. In recently year, 3D motion capture systems using 2D PSD (Position Sensitive Detector) optic sensor for motion capturing have been developed. One is Multi-PSD motion capture system applying stereo vision and another is Single-PSD motion capture system applying optical theory ship. But there are some problems to apply them to motion games. The Multi-PSD is high-cost and complicated because of using two more PSD Camera. It is so difficult to make markers having omni-direction equal intensity in Single-PSD. In this research, we propose a new theory that solves aforementioned problems. It can measure 3D coordination if separated two marker's intensity is equal to. We made a system based on this theory and experimented for performance capability. As a result, we were able to develop a motion capture system which is a single, low-cost, fast, compact, wide-angle and an adaptable motion games. The developed system is expected to be useful in animation, movies and games.
Keywords
Motion Capture System; Motion Games; 3D measurement; PSD sensor;
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