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23 January 2002 Wavelet invariant pattern recognition system based on the volume holographic correlator
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Abstract
In this paper, based on the volume holographic storage in a photorefractive crystal, a new rotation-, shift-invariant pattern recognition system, with the wavelet transform, has been set up. Parameters of rotated input pattern are first estimated and normalized. Rotation-, shift-invariant pattern recognition is then achieved by correlating the normalized input pattern with the undistorted reference, using the system. Simulation result and experiments demonstrate the effectiveness of this approach.
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Qingzeng Xue, Wenzhao Tan, Yingbai Yan, and Qingsheng He "Wavelet invariant pattern recognition system based on the volume holographic correlator", Proc. SPIE 4459, Photorefractive Fiber and Crystal Devices: Materials, Optical Properties, and Applications VII, and Optical Data Storage, (23 January 2002); https://doi.org/10.1117/12.454021
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