We introduce optical wavelet matched filters that perform the wavelet transforms for edge enhancement and perform correlations between the wavelet coefficients for shift-invariant pattern recognition. These new bandpass matched filters show improved discrimination capability with respect to the conventional matched spatial filter and improved signal-to-noise ratio with respect to the phase-only matched filter.
© 1993 Optical Society of America
Original Manuscript: October 1, 1992
Published: February 15, 1993
Yunlong Sheng, Harold Szu, Taiwei Lu, and Danny Roberge, "Optical wavelet matched filters for shift-invariant pattern recognition," Opt. Lett. 18, 299-301 (1993)