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Proceedings Paper

Coherent Optical Analysis, Filtering And Correlation Of Reflected Images
Author(s): Paolo Sirotti
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Paper Abstract

A reflected image can constitute the input image for a coherent optical processing system. We have set up an optical-digital hybrid computer which in its optical part uses two distinct lasers, one to process transparent images, the other to process reflected images. As examples of achievable operations two kinds of processes are illustrated: in the first one a reflected image is optically filtered with a continuously varying filter obtained with the technique of rotating filters. In the second one a pattern recognition method, the joint Fourier transform (JFT) correlation, is applied to both stationary and time varying surface textures.

Paper Details

Date Published: 21 March 1989
PDF: 10 pages
Proc. SPIE 1009, Surface Measurement and Characterization, (21 March 1989); doi: 10.1117/12.949178
Show Author Affiliations
Paolo Sirotti, University of Trieste (Italy)

Published in SPIE Proceedings Vol. 1009:
Surface Measurement and Characterization
Jean M. Bennett, Editor(s)

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