title: Rotation-invariant and controllable space-variant optical correlation.
abstract: We propose a method for designing a correlator for achieving rotation-invariant and controllable space-variant optical correlation. The design concept is based on a combination of fractional correlation and circular-harmonic decomposition of the reference object. The suggested method is described and analyzed in detail. Numerical simulations show that this new correlator might provide potential applications in practice.
authors.forename: Y
authors.initials: Y
authors.lastname: Zhang
authors.forename: B Y
authors.initials: BY
authors.lastname: Gu