Study and design of a programmable silicon retina for real-time pattern recognition

Bernard Lamalle; Patrick Gorria; Lew F.C. Lew Yan Voon; Guy Cathebras

doi:10.1117/12.397954

31 August 2000 Study and design of a programmable silicon retina for real-time pattern recognition

Bernard Lamalle, Patrick Gorria, Lew F.C. Lew Yan Voon, Guy Cathebras

Proceedings Volume 4076, Optical Diagnostics for Industrial Applications; (2000) https://doi.org/10.1117/12.397954
Event: Symposium on Applied Photonics, 2000, Glasgow, United Kingdom

Abstract

We present in this paper a prototype silicon retina that we have realized in standard CMOS technology. It is mainly composed of a photosensitive surface on which a metal layer representing a binary image is deposited. The partially masked photosensitive surface corresponds in fact to a photodiode which is directly connected to the output of the circuit. The readout signal is thus a current which is function of the luminous flux falling on the unmasked part of the photosensitive surface. It represents the correlation between an observed image and the reference image integrated on the sensor. The spatial sensitivity as well as the response of our retina as a function of a two-dimensional shifts between the reference image and an identical image projected on the sensor have been measured and found to correspond to our expectations. In order to improve the architecture of our retina for real time pattern recognition, we have done several computer simulations. The results of these simulations will be presented as well as the new architecture of our retina.

Citation Download Citation

Bernard Lamalle, Patrick Gorria, Lew F.C. Lew Yan Voon, and Guy Cathebras "Study and design of a programmable silicon retina for real-time pattern recognition", Proc. SPIE 4076, Optical Diagnostics for Industrial Applications, (31 August 2000); https://doi.org/10.1117/12.397954

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