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11 January 2005 Real-time image matching location technology with joint-transform correlator
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Abstract
In this paper, a convolute structure optoelectronic hybrid processing system for cruise missile scene matching guidance based on Joint Transform Correlator was proposed. An electrically addressed liquid crystal displays (EALCD) controlled by computer was used as spatial light modulator (SLM) was placed on input plane, on which reference image and target image were juxtaposed to display; in addition, CCD camera as a square law detector was placed in frequently spectrum plane recorded joint transform power spectrum and correlation result. Owing to detected the joint power spectrum and correlation result by CCD camera, the system could achieve sharper correlation peak and location accuracy by using edge detection input image and binaryzation of joint power spectrum. It was very advantageous to meet the demand of further improving performance, speed, strike accuracy of the cruise missile. Computer simulation and optical experiments showed that even in noisy background, the system can achieve excellent recognition and location performances with max speed: 16frames/s, recognition probability greater than 94%, and location accuracy better than a pixel.
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Xuanke Zhao, Qing Wu Zhao, Hongxia Wang, and Junfa He "Real-time image matching location technology with joint-transform correlator", Proc. SPIE 5642, Information Optics and Photonics Technology, (11 January 2005); https://doi.org/10.1117/12.574567
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