1 September 1992 Coherent optical processing of Gabor and wavelet expansions of one- and two-dimensional signals
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Optical Engineering, 31(9), (1992). doi:10.1117/12.59967
Abstract
Recent development in vision and image understanding related study reveals that a signal decomposition before processing may provide an enormous amount of useful information aboutthe signal. Various signal decomposition models such as the Gabor and wavelet expansions have been proposed. While the Gabor signal expansion creates a fixed resolution space-frequency signal representation, the wavelet transform provides a multiresolution signal space-scale decomposition. Digital implementation of these expansions are computationally intensive both because of the nature of the coordinate-doubling of the transforms and because ofthe large quantity of convolution/correlation operations to be performed. Optics with its inherent parallel-processing capability has been applied to many useful linear signal and image transformations for feature analysis and extraction. We studied the suitability of using optical processing techniques for the signal Gabor and wavelet analysis. Gabor and wavelet expansions of both 1- and 2-D signals and images are discussed. System parameters and limitations are analyzed. Preliminary experimental results are presented.
Yao Li, Yan Zhang, "Coherent optical processing of Gabor and wavelet expansions of one- and two-dimensional signals," Optical Engineering 31(9), (1 September 1992). http://dx.doi.org/10.1117/12.59967
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KEYWORDS
Wavelets

Signal processing

Image processing

Wavelet transforms

Optical filters

Image filtering

Modulation

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