Optical Associative Processors With Controlled Nonlinearity In The Fo'urier Domain

Bahram Javidi

doi:10.1117/12.962240

5 February 1990 Optical Associative Processors With Controlled Nonlinearity In The Fourier Domain

Bahram Javidi

Proceedings Volume 1151, Optical Information Processing Systems and Architectures; (1990) https://doi.org/10.1117/12.962240
Event: 33rd Annual Technical Symposium, 1989, San Diego, United States

Abstract

Two types of optical associative memory for two-dimensional image retrieval using nonlinear correlation is described. The product between the input image and the stored images is obtained by nonlinear correlation technique which has a superior performance compared with the conventional optical correlation techniques in the areas of the light efficiency, the correlation peak to sidelobe ratio and correlation spot size. We show that for some noisy inputs, it is necessary to use nonlinearity at the Fourier plane to improve the correlation SNR. Using this technique, better quality images can be reconstructed and the need for optical gain and the optical feedback may be eliminated.

Citation Download Citation

Bahram Javidi "Optical Associative Processors With Controlled Nonlinearity In The Fourier Domain", Proc. SPIE 1151, Optical Information Processing Systems and Architectures, (5 February 1990); https://doi.org/10.1117/12.962240

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