Coherent Optical Analysis, Filtering And Correlation Of Reflected Images

Paolo Sirotti

doi:10.1117/12.949178

21 March 1989 Coherent Optical Analysis, Filtering And Correlation Of Reflected Images

Paolo Sirotti

Proceedings Volume 1009, Surface Measurement and Characterization; (1989) https://doi.org/10.1117/12.949178
Event: 1988 International Congress on Optical Science and Engineering, 1988, Hamburg, Germany

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.

Citation Download Citation

Paolo Sirotti "Coherent Optical Analysis, Filtering And Correlation Of Reflected Images", Proc. SPIE 1009, Surface Measurement and Characterization, (21 March 1989); https://doi.org/10.1117/12.949178

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