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Proceedings Paper

Matching of terrestrial laser intensity image and optical image
Author(s): Yi Zhang; Weiwei Li; Hong Yang; Xiangyang Chen
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Paper Abstract

The matching of terrestrial laser intensity image and optical image is one of the active research areas in terrestrial laser scanning technique. In this paper, we introduce an algorithm based on gray scale to match intensity image and optical image. The similarity measure and the size of matching template are two crucial issues of this algorithm. Firstly, the correlation coefficient based on gray values and the mutual information based on statistical distribution are combined. Thus an integrated criterion is produced to extract corresponding points in an intensity image and an optical image. Secondly, an experiment was done to perceive the relations between the correlation coefficient and the mutual information of corresponding points and the size of a matching template. This image matching algorithm has two steps, coarse image matching and fine image matching. The coarse image matching step is carried out to search three precise pairs of corresponding points to calculate a mapping polynomial, by which a primary search region can be obtained for reducing the possibility of false correspondence and increasing the speed of image matching. While the fine image matching step aims at obtaining more precise corresponding points in the region determined by the mapping polynomial.

Paper Details

Date Published: 24 October 2011
PDF: 10 pages
Proc. SPIE 8286, International Symposium on Lidar and Radar Mapping 2011: Technologies and Applications, 82860A (24 October 2011); doi: 10.1117/12.912832
Show Author Affiliations
Yi Zhang, Wuhan Univ. (China)
Weiwei Li, Wuhan Univ. (China)
Hong Yang, The Yangtze Gorges Surveying Institute Co. (China)
Xiangyang Chen, Wuhan Univ. (China)

Published in SPIE Proceedings Vol. 8286:
International Symposium on Lidar and Radar Mapping 2011: Technologies and Applications
Jonathan Li, Editor(s)

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