27 December 1990 Thresholding effects on the performance of the binary nonlinear joint transform correlators
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Abstract
We investigate the performance of the binary joint transform correlator(JTC) for three types of threshoicling used to binarize the joint power spectrum. The first method is the fixed thresholding which uses the median of the joint power spectrum of the reference image and it does not include the effect of input scene noise. The second method( called the variable thresholding) takes into account the effect of the input scene noise and is the median of the joint power spectrum of the input scene and the reference image. The third method is the segmented thresholding that takes into account the effect of the input scene noise and is computed for each segment of the joint power spectrum. The correlation performance of the binary JTC is determined for each thresholding method and is compared to the linear( conventional) JTC. Computer simulation is used to determine the correlation peak intensity, peak to sidelobe ratio, and correlation width for various thresholding techniques. The results indicate that the thresholding of the joint power spectrum using the methods that take into account the input scene noise produce reasonably good correlation performance for large input scene noise
© (1990) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Bahram Javidi, Jianping Wang, "Thresholding effects on the performance of the binary nonlinear joint transform correlators", Proc. SPIE 1347, Optical Information Processing Systems and Architectures II, (27 December 1990); doi: 10.1117/12.23426; https://doi.org/10.1117/12.23426
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