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.
Original language | English |
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Pages (from-to) | 159-165 |
Number of pages | 7 |
Journal | IEEE Transactions on Electron Devices |
Volume | 50 |
Issue number | 1 |
DOIs | |
State | Published - 1 Jan 2003 |
Keywords
- Active pixel sensor (APS)
- CMOS
- Filter
- Image processing
- Pattern recognition
- Spatial filtering
- Very large scale integration (VLSI)
- Winner-take-all (WTA)
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Electrical and Electronic Engineering