ANALYSIS OF THE MAINTENANCE OF CORRELATION PLANE PEAK LOCALIZATION DESPITE SEVERE FREQUENCY PLANE MODULUS DISRUPTION

It is important for an optical pattern recognition filter to produce a localized correlation response without significant sidelobe structure . This paper notes, and investigates further, the high degree of robus tness of the correlation response of a wideband filter in the face of severe frequency domain modulus disruption. The phenomenon is demonstr ated by simulation, and analysis is presented to explain the observati ons. This property may be of value in filter design by allowing the re laxation of frequency domain constraints in the knowledge that correla tion peak structure will not drastically deteriorate. (C) 1998 Society of Photo-Optical Instrumentation Engineers. [S0091-3286(98)01101-5].