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AMulti-sensor Image Registration Approach Based on Hausdorff Distance |
LIANG Yong1, 2, ZHU Ming-bo3, YANG Ru-liang1 |
(1. Institute of Electronics, Chinese Academy of Sciences, Beijing 100080, China; 2. Graduate School,Chinese Academy of Sciences, Beijing 10039, China; 3. Department of Electronic and Information Engineering , NAEI , Yantai, Shandong 264001, China) |
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Abstract This paper presents a multi-sensor image registration approach based on Hausdorff distance.Firstly, close contours of images are extracted through bottom -hat filter and threshold. Secondly Hausdorff distances between the longer contours of different maps are calculated, and contour pairs with small enough Hausdorff distance are deemedmatching contours pairs. Then the consistency checking succeeds by relative distance ratio histogram clustering based on center of contours. Finally accurate contour pairs are obtained so that image transformation parameters are attained by applying LSM in in terrelated parts. Considering speckle noise of SAR images and distortion due to multi-sensor images being taken at different time, extracted contours of SAR and optical images differ to certain extent. As Hausdorff distance allows large contour difference, the approach presented in this paper can register images of wide translational and distortional range.
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Received: 21 March 2006
Published: 27 September 2011
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