Experimental research on image motion measurement using optical joint transform correlator for space camera application

Hui Zhao; Hongwei Yi; Yingcai Li; Chicheng Che; Xiao Xiao

doi:10.1117/12.864658

22 October 2010 Experimental research on image motion measurement using optical joint transform correlator for space camera application

Hui Zhao, Hongwei Yi, Yingcai Li, Chicheng Che, Xiao Xiao

Author Affiliations +

Proceedings Volume 7830, Image and Signal Processing for Remote Sensing XVI; 78301D (2010) https://doi.org/10.1117/12.864658
Event: SPIE Remote Sensing, 2010, Toulouse, France

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.

Citation Download Citation

Hui Zhao, Hongwei Yi, Yingcai Li, Chicheng Che, and 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); https://doi.org/10.1117/12.864658

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