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1 October 1999 Dual multichannel optical wavelet transform processor
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Based on the theory of volume holographic associative storage in a photorefractive crystal and that of binary optics, a compact dual multichannel optical wavelet transform processor is proposed and constructed. Both wavelet correlation and wavelet transform can be complemented by the system. Multi-pattern channels are achieved by the inherent parallelism of volume holographic storage. Angle multiplexed holograms of wavelet filtered pattern images are recorded in the crystal Multi-wavelet channels are accomplished by a Dammann grating, which is a binary optical element for spectrum duplication. The grating is adopted to generate a set of channels with different wavelet filters. Wavelet correlation peaks in different wavelet channels are synthesized to improve the recognition accuracy by multiplication pixel by pixel. Wavelet transform results in different wavelet channels are stored in the crystal and can be restored for recognition or segmentation. The application of the system in human face recognition is studied.
© (1999) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Wenyi Feng, Yingbai Yan, Guofan Jin, Minxian Wu, and Qingsheng He "Dual multichannel optical wavelet transform processor", Proc. SPIE 3804, Algorithms, Devices, and Systems for Optical Information Processing III, (1 October 1999);

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