17 April 2006 Non-conventional joint transform correlation using grating filters and heterodyne scanning techniques for pattern recognition applications
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Abstract
Simple grating filters such as rectangular and triangular ones are used in a two non-conventional real-time joint-transform correlation (JTC) architectures to eliminate the spatial light modulators (SLM) at the Fourier planes of a conventional JTC. In the first one, the grating filter is used along with a heterodyning and one-dimensional optical scanning techniques to capture the cross-correlation functions of the input images without major processing. This significantly reduces the time processing needed for real-time applications by eliminating the drawbacks of the non-ideal characteristics of the SLMs. In the second technique, the one-dimensional optical scanning is eliminated to achieve a faster (but a little bit more complicated) processing.
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Abdallah K. Cherri, Mohammed S. Alam, "Non-conventional joint transform correlation using grating filters and heterodyne scanning techniques for pattern recognition applications", Proc. SPIE 6245, Optical Pattern Recognition XVII, 62450R (17 April 2006); doi: 10.1117/12.666224; https://doi.org/10.1117/12.666224
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