Performance of an image-encrypted joint transform correlator for pattern recognition |
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Authors: | Chau-Jern Cheng |
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Institution: | (1) Department of Electrical Engineering, Feng Chia University, 407 Taichung, Taiwan, R.O.C. |
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Abstract: | An image-encrypted joint transform correlator for pattern recognition is proposed and evaluated. The correlator performs twofold
correlation for recognizing the primary image and cipher, and the encrypting cipher acts to enhance or inhibit the correlation
peak if the cipher is correctly input. By incorporating the original image with an appropriate cipher, the correlator achieves
better pattern discrimination and is robust against distortion. Simulation results show that the pixel number and the cell
size of cipher affect the characteristics of the correlator. |
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Keywords: | joint transform correlator optical pattern recognition optical processing |
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