title: Fresnel transform-based correlator.
abstract: We present a new technique for information processing using Fresnel transform-based correlation. The main emphasis is on the design of a correlator involving the reference object and its near-field diffraction pattern at an optimized distance. The input-scene image and its diffraction pattern constitute the input pattern of the new correlator. The new technique shows a significant increase in discrimination ability and optical efficiency. Moreover, different encoding methods, such as the phase-only filter or the matched filter, can be used in conjunction with this method. A theoretical analysis as well as examples are given.
authors.forename: H
authors.initials: H
authors.lastname: Hamam
authors.forename: H H
authors.initials: HH
authors.lastname: Arsenault