Spatial integrating joint transform correlator for pattern recognition by use of an infinite grating filter

Jorge L. Flores; José A. Ferrari; G. Garcia-Torales; Jorge Sánchez Preciado

doi:10.1117/12.827869

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1 September 2009 Spatial integrating joint transform correlator for pattern recognition by use of an infinite grating filter

Jorge L. Flores, José A. Ferrari, G. Garcia-Torales, Jorge Sánchez Preciado

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Proceedings Volume 7442, Optics and Photonics for Information Processing III; 74421C (2009) https://doi.org/10.1117/12.827869
Event: SPIE Optical Engineering + Applications, 2009, San Diego, California, United States

Abstract

A joint transform correlator (JTC) is presented. In the proposed setup the joint transform of the images to be correlated is filtered by an infinite Ronchi ruling, which is generated by a spatial light modulator, SLM, at the Fourier plane. A lens produces the spatial integral of the product of the joint transform of the composite input and the amplitude transmittance of the spatial light modulator, and a photodetector acquire the total light energy transmitted by the SLM. The proposed technique significantly reduces the processing time needed for real-time applications.

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Jorge L. Flores, José A. Ferrari, G. Garcia-Torales, and Jorge Sánchez Preciado "Spatial integrating joint transform correlator for pattern recognition by use of an infinite grating filter", Proc. SPIE 7442, Optics and Photonics for Information Processing III, 74421C (1 September 2009); https://doi.org/10.1117/12.827869

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