An APS with 2-D winner-take-all selection employing adaptive spatial filtering and false alarm reduction

Author

Fish, Alexander ; Turchin, Dmitry ; Yadid-Pecht, Orly

Author_Institution

VLSI Syst. Center, Ben-Gurion Univ., Beer-Sheva, Israel

Volume

50

Issue

1

fYear

2003

fDate

1/1/2003 12:00:00 AM

Firstpage

159

Lastpage

165

Abstract

An active pixel sensor (APS) with two-dimensional winner-take-all (WTA) detection is presented. This system-on-a-chip 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 test chip of a 64^*64 array has been implemented in 0.5-μm CMOS technology, has a 49% fill factor, is operated by a 3.3-V supply, and dissipates 36 mW at video rate. System architecture and operation are discussed and measurements from the prototype chip are presented.

Keywords

CMOS image sensors; VLSI; adaptive filters; spatial filters; 0.5 micron; 2D winner-take-all selection; 3.3 V; 36 mW; APS; CMOS; VLSI; active pixel sensor; adaptive spatial filtering; bad pixel elimination; false alarm reduction; fill factor; system architecture; test chip; Adaptive filters; CMOS image sensors; CMOS process; CMOS technology; Circuits; Filtering; Image processing; Pixel; Very large scale integration; Voltage;

fLanguage

English

Journal_Title

Electron Devices, IEEE Transactions on

Publisher

ieee

ISSN

0018-9383

Type

jour

DOI

10.1109/TED.2002.807250

Filename

1185177