Title :
Pixel-level color image sensor with efficient ambient light suppression using modulated RGB flashlight and application to TOF range finding
Author :
Oike, Yusuke ; Ikeda, Makoto ; Asada, Kunihiro
Author_Institution :
Dept. of Electron. Eng., Univ. of Tokyo, Japan
Abstract :
We present a pixel-level color image sensor with efficient ambient light suppression using a modulated RGB flashlight to support a recognition system. Bidirectional photo integrators realize in-pixel demodulation of a projected flashlight with suppressing an ambient light at short intervals during exposure time to avoid saturation from ambient illumination. Every pixel has a capability of depth and color capture. A prototype chip has been designed using 0.35 μm CMOS process and successfully tested.
Keywords :
CMOS image sensors; image colour analysis; 0.35 micron; CMOS process; TOF range finding; bidirectional photo integrators; efficient ambient light suppression; modulated RGB flashlight; pixel-level color image sensor; CMOS process; Color; Demodulation; Image recognition; Image sensors; Lighting; Optical modulation; Pixel; Prototypes; Sensor systems;
Conference_Titel :
VLSI Circuits, 2004. Digest of Technical Papers. 2004 Symposium on
Print_ISBN :
0-7803-8287-0
DOI :
10.1109/VLSIC.2004.1346595
