複合現実感応用に向けた高速・低輝度IDビーコン検出イメージセンサ(<小特集>ヒューマンインタフェースとバーチャルリアリティ)

概要

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In this paper, we present a smart image sensor with high-speed and low-intensity ID beacon detection for an augmented reality (AR) system. AR systems are designed to provide an enhanced view of the real world with meaningful information on a computer. Our target AR system uses an optical device with an ID beacon such as a blinking LED. Our sensor architecture simultaneously achieves analog readout for 2-D image capture and high-speed digital readout for ID beacon detection. The pixel circuit has a logarithmic-response photo detector and an adaptive modulation amplifier to detect the low-intensity ID beacon with a wide range of background illumination. We developed and successfully tested a 128×128 smart sensor. It achieves 20 bytes/ID・frame with a 40kHz carrier at 30fps, and less than -10.0dB signal-to-background ratio (SBR) with more than 40dB background illumination in robust ID-beacon detection.
社団法人映像情報メディア学会の論文
2004-06-01