22 October 2010 Experimental research on image motion measurement using optical joint transform correlator for space camera application
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Abstract
The optical joint transform correlator (JTC) is an effective way to measure the image motion that is hard to be eliminated for space camera. In this manuscript, the principle of JTC is briefly introduced and then a static experiment is designed to demonstrate the suitability of JTC for space camera application. The results demonstrate that the RMS (root-mean-square) error of motion determination can be controlled below 0.15 pixels in both the horizontal and vertical direction, which is good enough to satisfy the space camera requirements. Besides that, the performance of two methods used to locate the cross-correlation peak is also evaluated. Compared with the traditional centroid computing method, Intensity Weighting Centroiding (IWC) is superior because it can not only reduce the sensitiveness of cross-correlation peak to window size selection, but also improves measurement accuracy.
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Hui Zhao, Hui Zhao, Hongwei Yi, Hongwei Yi, Yingcai Li, Yingcai Li, Chicheng Che, Chicheng Che, Xiao Xiao, Xiao Xiao, } "Experimental research on image motion measurement using optical joint transform correlator for space camera application", Proc. SPIE 7830, Image and Signal Processing for Remote Sensing XVI, 78301D (22 October 2010); doi: 10.1117/12.864658; https://doi.org/10.1117/12.864658
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