Volume holographic wavelet correlators with multi-input channels

Wenyi Feng; Yingbai Yan; Guofan Jin; Minxian Wu; Qingsheng He

doi:10.1117/12.363998

1 October 1999 Volume holographic wavelet correlators with multi-input channels

Wenyi Feng, Yingbai Yan, Guofan Jin, Minxian Wu, Qingsheng He

Proceedings Volume 3805, Photonic Devices and Algorithms for Computing; (1999) https://doi.org/10.1117/12.363998
Event: SPIE's International Symposium on Optical Science, Engineering, and Instrumentation, 1999, Denver, CO, United States

Abstract

Optical correlators based on volume holographic associative storage and wavelet matched filtering generally have single input channel. In other words, they can only process one input image at a same time. Based on the fact that a volume holographic correlator is not a shift invariance system, novel volume holographic wavelet correlators with multi- input channels are proposed and constructed in this paper to improve the parallelism of processing. Without adding any component, the method of input plane shifting and the technique of angle multiplexing are combined besides the introduction of wavelet transform. With the correlators, several input images can be recognized simultaneously according to a same system output. Conditions of realizing multi-input channel processing are studied in this paper. The mechanism and prototype of the system are described in detail. The performance of the system in human face recognition is testified by experiment. Promising results are given.

Citation Download Citation

Wenyi Feng, Yingbai Yan, Guofan Jin, Minxian Wu, and Qingsheng He "Volume holographic wavelet correlators with multi-input channels", Proc. SPIE 3805, Photonic Devices and Algorithms for Computing, (1 October 1999); https://doi.org/10.1117/12.363998

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