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Proceedings Paper

Experimental research on image motion measurement using optical joint transform correlator for space camera application
Author(s): Hui Zhao; Hongwei Yi; Yingcai Li; Chicheng Che; Xiao Xiao
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Paper 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.

Paper Details

Date Published: 22 October 2010
PDF: 8 pages
Proc. SPIE 7830, Image and Signal Processing for Remote Sensing XVI, 78301D (22 October 2010); doi: 10.1117/12.864658
Show Author Affiliations
Hui Zhao, Xi'an Institute of Optics and Precision Mechanics (China)
Hongwei Yi, Xi'an Institute of Optics and Precision Mechanics (China)
Yingcai Li, Xi'an Institute of Optics and Precision Mechanics (China)
Chicheng Che, Huazhong Institute of Electro-Optics (China)
Xiao Xiao, Xidian Univ. (China)

Published in SPIE Proceedings Vol. 7830:
Image and Signal Processing for Remote Sensing XVI
Lorenzo Bruzzone, Editor(s)

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