## Rotation-Invariant and Controllable Space-Variant Optical Correlation

Applied Optics, Vol. 37, Issue 26, pp. 6256-6261 (1998)

http://dx.doi.org/10.1364/AO.37.006256

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### 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.

© 1998 Optical Society of America

**OCIS Codes**

(070.0070) Fourier optics and signal processing : Fourier optics and signal processing

(070.2590) Fourier optics and signal processing : ABCD transforms

(070.4550) Fourier optics and signal processing : Correlators

(070.5010) Fourier optics and signal processing : Pattern recognition

**Citation**

Yan Zhang and Ben-Yuan Gu, "Rotation-Invariant and Controllable Space-Variant Optical Correlation," Appl. Opt. **37**, 6256-6261 (1998)

http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-37-26-6256

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