A technique for optical pattern recognition using an amplitude-compensated matched filter is presented. With the synthetic discriminant function in a matched spatial filtering application an iterative technique is employed to first obtain the synthetic discriminant functions for the phase-only matched filter and then is extended to the amplitude-compensated matched filter. Computer simulation shows that the suggested spatial filter has a high signal-to-noise ratio and good Horner efficiency, and it is more sensitive to changes in the input image.
Wang, Z-Q., Gillespie, W. A., Cartwright, C. M., & Soutar, C. (1993). Optical pattern recognition using a synthetic discriminant amplitude-compensated matched filter. Applied Optics, 32(2), 184-189. https://doi.org/10.1364/AO.32.000184