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

Authors

Farid Boussaid, Edith Cowan University
Amine Bermak, Edith Cowan University
Abdesselam Bouzerdoum, Edith Cowan University

Document Type

Book Chapter

Publisher

WSEAS Press

Faculty

Faculty of Computing, Health and Science

School

School of Engineering and Mathematics

RAS ID

1056

Comments

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. 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.