Title :
640/spl times/480 Real-time range finder using high-speed readout scheme and column-parallel position detector
Author :
Oike, Y. ; Ikeda, M. ; Asada, K.
Author_Institution :
Dept. of Electron. Eng., Tokyo Univ., Japan
Abstract :
In this paper, we present the first real-time range finder with the capability of VGA (640/spl times/480) resolution based on a light-section method. We propose an adaptive thresholding circuit and column-parallel time-domain approximate ADCs to realize high-speed readout for real-time range finding. Sub-pixel position calculation based on intensity profile by the readout scheme achieves high-accuracy range finding. A column-parallel position detector suppresses redundant data transmission for a real-time measurement system.
Keywords :
CMOS image sensors; analogue-digital conversion; distance measurement; position measurement; readout electronics; ADC; VGA; adaptive thresholding circuit; column parallel position detector; high speed readout scheme; light section method; real time range finder; CMOS image sensors; Circuits; Design engineering; Detectors; Image resolution; Pixel; Position measurement; Real time systems; Time domain analysis; Very large scale integration;
Conference_Titel :
VLSI Circuits, 2003. Digest of Technical Papers. 2003 Symposium on
Conference_Location :
Kyoto, Japan
Print_ISBN :
4-89114-034-8
DOI :
10.1109/VLSIC.2003.1221187
