Approximate filters based on a phase-only filter for reliable recognition of objects are proposed. Good light efficiency and discrimination capability close to that of the optimal filter can be obtained. Computer simulation results are presented and discussed. © 1994 Optical Society of America.
Kober, V., Yaroslavsky, L. P., Campos, J., & Yzuel, M. J. (1994). Optimal filter approximation by means of a phase-only filter with quantization. Optics Letters, 19, 978-980. https://doi.org/10.1364/OL.19.000978