2009•Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIERequires access
Spatial integrating joint transform correlator for pattern recognition by use of an infinite grating filter
Jorge L. Flores, José A. Ferrari, Guillermo García–Torales, Jorge Sánchez Preciado
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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.