Filtering by synthetic discriminant function (SDF) is an effective method to achieve distortion invariant optical pattern recognition(1). In this paper, the fundamental algorithm of SDF is applied to optical power spectrum recognition and classification in optical frequency spectrum analytical system, and an optical implementation of SDF method for the classification is presented and rather good results are obtained.
L. R. Guo,
X. Y. Su,
G. S. Zhang,
"The SDF Method In Optical Power Spectrum Recognition", Proc. SPIE 0813, Optics and the Information Age, (1 January 1987); doi: 10.1117/12.967303; https://doi.org/10.1117/12.967303