Title :
A 100-dB-DR Predictive-Integration CMOS Image Sensor for Laser Rangefinding
Author :
Gao, Wei ; Liscombe, Michael ; Hornsey, Richard ; Beraldin, J. Angelo
Author_Institution :
Dept. of Comput. Sci. & Eng., York Univ., Toronto, ON, Canada
Abstract :
A CMOS image sensor for laser-spot detection in an optical triangulation-based 3-D vision system is presented in this paper. Two aligned linear arrays, namely, a high-dynamic-range (DR) array and a winner-take-all array, independently perform DR enhancement and region-of-interest control. A new predictive integration scheme is suggested to find the adaptive integration time without searching all possible subintegration periods. It has been demonstrated that the DR of the chip (typically ~50 dB in the 0.18-mum digital process used) can be enhanced to 100 dB with six subintegration periods.
Keywords :
CMOS image sensors; laser ranging; CMOS image sensor; adaptive integration time; digital process; high-dynamic-range array; laser rangefinding; laser-spot detection; optical triangulation-based 3D vision system; region-of-interest control; size 0.18 mum; winner-take-all array; CMOS image sensors; Councils; Dynamic range; Image sensors; Lighting; Machine vision; Nonlinear optics; Optical detectors; Optical sensors; Sensor systems; Signal to noise ratio; 3-D vision system; CMOS active pixel sensor (APS); high dynamic range (HDR); predictive integration; winner-take-all (WTA);
Journal_Title :
Electron Devices, IEEE Transactions on
DOI :
10.1109/TED.2009.2030655
