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Proceedings Paper

Study and design of a programmable silicon retina for real-time pattern recognition
Author(s): Bernard Lamalle; Patrick Gorria; Lew F.C. Lew Yan Voon; Guy Cathebras
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Paper 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.

Paper Details

Date Published: 31 August 2000
PDF: 10 pages
Proc. SPIE 4076, Optical Diagnostics for Industrial Applications, (31 August 2000); doi: 10.1117/12.397954
Show Author Affiliations
Bernard Lamalle, Univ. de Bourgogne (France)
Patrick Gorria, Univ. de Bourgogne (France)
Lew F.C. Lew Yan Voon, Univ. de Bourgogne (France)
Guy Cathebras, Univ. Montpellier II (France)

Published in SPIE Proceedings Vol. 4076:
Optical Diagnostics for Industrial Applications
Neil A. Halliwell, Editor(s)

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