A Pixel-Parallel Algorithm for Detecting and Tracking Fast-Moving Modulated Light Signals
Shingo Kagami, Masatsugu Shinmeimae, Takashi Komuro,
Yoshihiro Watanabe, and Masatoshi Ishikawa
Graduate School of Information Science and Technology, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
We developed a pixel-parallel image processing algorithm for detecting and tracking temporally modulated light signals for use as optical ID tags. The proposed algorithm requires no wavelength filters and obtains position information on signals at a high frame rate while decoding transmitted data. We implemented the proposed algorithm in a digital vision chip, a pixel-parallel processor embedded in a CMOS image sensor, and proved it to be operationally feasible.
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