A rotation-invariant photorefractive correlation is reported in this paper. Matched filters synthesized with reference patterns at different rotational angles are stored in the photorefractive medium via angular and peristrophic multiplexing. During the recognition process, the input image is compared with all the reference patterns in parallel. The feasibility of the proposed correlator is demonstrated by experimental results.
© (1996) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
James Zhiqing Wen, James Zhiqing Wen, Xiangyang Yang, Xiangyang Yang, } "Rotation-invariant photorefractive correlator", Proc. SPIE 2849, Photorefractive Fiber and Crystal Devices: Materials, Optical Properties, and Applications II, (25 October 1996); doi: 10.1117/12.255487; https://doi.org/10.1117/12.255487

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