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Proceedings Paper

Influence of preprocessing on correlation filter design: simulated and experimental considerations
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Paper Abstract

This paper reviews some results of an ongoing research program at the Institute of Optical Research that addresses optical correlators dedicated to pattern recognition. A two- class discrimination problem with in-plane distortion is considered. To cope with the loss of information that may occur when input images are directly displayed on experimental binary SLMs in a Vanderlugt correlator, we have implemented several types of preprocessing operators on the original gray scale images. Performance criteria are presented to assess and grade preprocessors that can be implemented in real-time on an electronic frame grabber board. Optical implementation in a VanderLugt correlator is described. Experimental results are provided and emphasize the benefits of preprocessing prior to binarization. Significant improvements are found, both digitally and optically, with classical derivative and rank operators.

Paper Details

Date Published: 27 December 1996
PDF: 6 pages
Proc. SPIE 2969, Second International Conference on Optical Information Processing, (27 December 1996);
Show Author Affiliations
Bertrand Noharet, Institute of Optical Research (Sweden)
Henrik Sjoeberg, Institute of Optical Research (Sweden)
Lech Wosinski, Institute of Optical Research (Sweden)

Published in SPIE Proceedings Vol. 2969:
Second International Conference on Optical Information Processing
Zhores I. Alferov; Yuri V. Gulyaev; Dennis R. Pape, Editor(s)

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