Binary joint Fourier transform correlator considerations

Mark Andrew Waring; Jaye M. Waas

doi:10.1117/12.21234

1 September 1990 Binary joint Fourier transform correlator considerations

Mark Andrew Waring, Jaye M. Waas

Proceedings Volume 1295, Real-Time Image Processing II; (1990) https://doi.org/10.1117/12.21234
Event: 1990 Technical Symposium on Optics, Electro-Optics, and Sensors, 1990, Orlando, FL, United States

Abstract

Results of research into the performance of a Joint Transform correlator utilizing the binary magnetooptic spatial light modulator are discussed. Computer simulation and experimental correlation plane analyses are presented. Optical correlation performance is discussed, with emphasis on the JFTC's recognition capability in the presence of input noise and clutter. The JFTC suffers significantly more degradation in correlation SNR from the addition of input noise and clutter than the VanderLugt correlator using the same binary SLMs. When the JFTC and the VanderLugt architectures are compared using identical input patterns containing added noise and clutter, the correlation SNR is many times lower in the JFTC than in the VanderLugt. A Fourier plane thresholding technique which dramatically reduces the D.C. correlation intensity is also introduced. This technique achieves reduction in D.C. peak intensity of from 30 to over 80 percent, while affecting the correlation peak intensity by less than 5 percent. Conclusions on the potential for use of the JFTC in various pattern recognition applications are discussed.

Citation Download Citation

Mark Andrew Waring and Jaye M. Waas "Binary joint Fourier transform correlator considerations", Proc. SPIE 1295, Real-Time Image Processing II, (1 September 1990); https://doi.org/10.1117/12.21234

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KEYWORDS

Optical correlators

Signal to noise ratio

Fourier transforms

Computer simulations

Binary data

Spatial light modulators

Image processing

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