24-01-2012, 01:10 PM
CMOS IMAGE SENSORS
[attachment=16515]
Introduction
Mobile imaging, digital still and video cameras, Internet-based video conferencing, surveillance, and biometrics
Over 230 million parts shipped in 2004
Estimated annual growth rate of over 28%
Non-Idealities and Performance Measures
Three important aspects of image sensor performance are:
-SNR (signal to noise ratio): higher than 40 dB required
-DR (dynamic range): range of illumination that can be detected by the image sensor.
Standard CMOS Image sensors have a DR of 40-60 dB, While human eye exceeds 90 dB.
-Spatial Resolution: determined by the Nyquist sampling theorem.
