Experimental research on power spectrum processing in joint transform correlator image recognition

Weimin Sun; Yang Yang

doi:10.1117/12.726614

5 March 2007 Experimental research on power spectrum processing in joint transform correlator image recognition

Weimin Sun, Yang Yang

Proceedings Volume 6595, Fundamental Problems of Optoelectronics and Microelectronics III; 659528 (2007) https://doi.org/10.1117/12.726614
Event: Fundamental Problems of Optoelectronics and Microelectronics III, 2006, Harbin, China

Abstract

Optical correlation enables the rapid identification of targets within an input signal. This is due to the inherent Fourier-transforming property of an optical lens system. The quick development of Liquid Crystal Display (LCD) brings opportunity to simply the optical inspection system. The most important part of the system is the joint transform correlator (JTC). The self-correlated peaks of target image and reference image display overlapped in the center of output plane. Its high-intensity and wide-breadth affect the correlation peak recognition. A Gaussian filter of power spectrum processing is proposed. It can weaken the zero-order bright spot in the correlation plane, narrow the bandwidth of the zero-diffractive peak, leach noises efficaciously and sharpen the correlated peak. This method is simple and efficacious, adapts to real-time JTC.

Citation Download Citation

Weimin Sun and Yang Yang "Experimental research on power spectrum processing in joint transform correlator image recognition", Proc. SPIE 6595, Fundamental Problems of Optoelectronics and Microelectronics III, 659528 (5 March 2007); https://doi.org/10.1117/12.726614

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KEYWORDS

Image processing

Joint transforms

Optical correlators

LCDs

Gaussian filters

Image filtering

Optical filters

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