1 April 1998 Compact optical correlator: pre-processing and filter encoding strategies applied to images with varying illumination
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Optical Engineering, 37(4), (1998). doi:10.1117/1.602028
Abstract
We present a portable, versatile optical pattern recognition system that can process 256x256 pixel images at high speed. The system is fully controlled by Windows-based software and can easily be switched between VanderLugt and joint transform operation. It combines the advantages of optics and electronics to form an advanced hybrid system where pre- and postprocessing algorithms can be varied depending on the application. Simulation and experimental results show that edge enhancement combined with binarization gives good results when applied to images where the illumination is varying.
Henrik J. Sjoberg, Bertrand Noharet, Lech Wosinski, Rolph Hey, "Compact optical correlator: pre-processing and filter encoding strategies applied to images with varying illumination," Optical Engineering 37(4), (1 April 1998). http://dx.doi.org/10.1117/1.602028
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KEYWORDS
Image filtering

Spatial light modulators

Optical filters

Optical correlators

Binary data

Computer programming

Linear filtering

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