NDLI: A CMOS imager with on-chip temporal filtering for motion pre-processing

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2000 IEEE International Symposium on Circuits and Systems. Emerging Technologies for the 21st Century. Proceedings (IEEE Cat No.00CH36353)

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A CMOS imager with on-chip temporal filtering for motion pre-processing

Content Provider	IEEE Xplore Digital Library
Author	Gopalan, A. Harrison, R.R.
Copyright Year	2002
Description	Author affiliation: Dept. of Electr. & Comput. Eng., Utah Univ., Salt Lake City, UT, USA (Gopalan, A.; Harrison, R.R.)
Abstract	Robust motion detection algorithms such as the motion energy model require temporal filtering at the pixel level. We have designed and tested a CMOS imager with integrated, pixel-level temporal filtering necessary for motion detection. This temporal filtering enhances transients and provides a delayed and non-delayed channel for each pixel in the array. By varying bias currents on the chip, we are able to control the time constant of continuous-time low-pass filters that set the delay. By varying a reset switching frequency, we can control the high-pass filter time constant which determines the time course of transient enhancement. Operation primarily in weak inversion results in a low-power sensor well suited for integration into a motion processing system. We have constructed a 16/spl times/16 temporal processing array in a 0.5 /spl mu/m CMOS process.
Sponsorship	IEEE IEEE Circuits & Syst. Soc
File Size	400374
File Format	PDF
ISBN	0780374487
DOI	10.1109/ISCAS.2002.1010993
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2002-05-26
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Low pass filters Motion detection Robustness Filtering algorithms Semiconductor device modeling Testing Pixel Delay effects Switching frequency Sensor systems
Content Type	Text
Resource Type	Article

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