Title :
An APS with 2-D WTA selection employing adaptive spatial filtering, bad pixel elimination and false alarm reduction
Author :
Fish, Alexander ; Turchin, Dmitry ; Yadid-Pecht, Orly
Author_Institution :
VLSI Syst. Center, Ben-Gurion Univ. of the Negev, Beer-Sheva, Israel
Abstract :
An APS (active pixel sensor) with 2D winner-take-all detection is presented. The system employs adaptive spatial filtering of the processed image with bad pixel elimination and false alarm reduction in case of a missing object. The circuit has a unique ability of adaptive spatial filtering that allows removal of the background from the image, one stage before it is transferred to the WTA detection circuit. A 64×64 test chip has been implemented in 0.5 μm CMOS technology with 3.3 V supply and is expected to dissipate 128 mW at video rate. System operation is discussed and simulation results are presented.
Keywords :
CMOS image sensors; adaptive filters; adaptive signal processing; circuit simulation; spatial filters; video signal processing; 0.5 micron; 128 mW; 2D WTA selection; 2D winner-take-all detection; 3.3 V; 4096 pixel; 64 pixel; APS; CMOS test chip; active pixel sensor; adaptive spatial filtering; bad pixel elimination; false alarm reduction; image background removal; missing object; processed image; simulation; system operation; video rate power dissipation; Adaptive filters; CMOS image sensors; CMOS technology; Circuits; Filtering; Image processing; Pixel; Sensor arrays; Sensor systems; Voltage;
Conference_Titel :
Circuits and Systems, 2002. ISCAS 2002. IEEE International Symposium on
Conference_Location :
Phoenix-Scottsdale, AZ
Print_ISBN :
0-7803-7448-7
DOI :
10.1109/ISCAS.2002.1010991
