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

Keywords

CMOS imager, Dynamic Range, Edge enhancement, Shunting Inhibition, System-On-Chip, VLSI, Image sensors

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.