The idea of a phase-only matched filter [ HornerJ. L. GianinoP. D., Appl. Opt. 23, 812– 816 ( 1984)] is incorporated in the scheme of circular harmonic component matched filtering [ HsuY. N. ArsenaultH. H., Appl. Opt. 21, 4016– 4019 ( 1982)]. Computer simulation showed that the phase-only circular harmonic matched filter possesses the rotational invariant property for 2-D recognition. Furthermore, it does a better job in recognizing closely placed targets compared with traditional circular harmonic filters. The simulation also demonstrated that a pure phase circular harmonic filter is less liable to give rise to false alarms in recognition because the sidelobe produced by it is much less pronounced and much less extensive than that produced by a traditional circular harmonic filter.
© 1989 Optical Society of America
Original Manuscript: August 22, 1988
Published: June 1, 1989
Hon Fai Yau and Chi Ching Chang, "Phase-only circular harmonic matched filtering," Appl. Opt. 28, 2070-2074 (1989)