Rotation-invariant and controllable space-variant optical correlation
Yan Zhang, Ben–Yuan Gu · Applied Optics · 1998
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.