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Methods of Increasing Discrimination in Optical Filtering

R. A. Binns, A. Dickinson, and B. M. Watrasiewicz

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Abstract

Optical spatial filtering techniques for pattern detection and several methods of increasing the discrimination between similar patterns are described. The use of high signal spectrum-to-reference beam intensities is found to be the most useful of these methods, and the properties of filters of alphanumeric characters made in this way are compared with linear filters.

© 1968 Optical Society of America

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