Title

A current-mode CMOS imager using shunting inhibition-based dynamic range compression

Document Type

Book Chapter

Publisher

WSEAS Press

Faculty

Computing, Health and Science

School

Engineering and Mathematics

RAS ID

1056

Comments

Originally published as: Boussaid, F., Bermak, A., & Bouzerdoum, A. (2002). A current-mode CMOS imager using shunting inhibition-based dynamic range compression. In Recent Advances in Circuits, Systems and Signal Processing (138-142). Greece: WSEAS Press. Original article available here

Abstract

An ultra-wide dynamic range current-mode CMOS imager is presented. It achieves dynamic range compression by using biologically inspired shunting inhibition vision models. As a result, it features retina-like characteristics, enabling the sensor to adapt to a wide range of scene illumination conditions. Local image contrast and edge information are preserved and can be further enhanced. The properties of the shunting inhibition-based dynamic range compression can be defined by a simple set of externally-tunable parameters, making the proposed current-mode CMOS imager architecture fully programmable. The prototype was designed in full custom ALCATEL 0.5μm CMOS technology.

 
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