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Journal of Applied Remote Sensing

Robust rigid coherent point drift algorithm based on outlier suppression and its application in image matching
Author(s): Songlin Liu; Gang Sun; Zhaodong Niu; Na Li; Zengping Chen
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Paper Abstract

The typical probability based point pattern matching method is coherent point drift (CPD) algorithm, which treats one point set as centroids of a Gaussian mixture model, and then fits it to the other. It uses the expectation maximization framework, where the point correspondences and transformation parameters are updated alternately. However, the anti-outlier performance of CPD is not robust enough as outliers have always been involved in the operation until the CPD converges. Hence, an automatic outlier suppression (AOS) mechanism is proposed. First, outliers are judged by a matching probability matrix. Then, transformation parameters are fitted using accurate matching point sets. Finally, the Gaussian centroids are forced to move coherently by this transformation model. AOS-CPD can efficiently improve the anti-outlier performance of rigid CPD. Furthermore, CPD is applied to image matching. A new local changing information descriptor-relative phase histogram (RPH) is designed and RPH-AOS-CPD is proposed to embed RPH measurement into AOS-CPD as a constraint condition. RPH-AOS-CPD makes full use of grayscale information besides having an excellent anti-outlier performance. The experimental results based on both synthetic and real data indicate that compared with other algorithms, AOS-CPD is more robust to outliers and RPH-AOS-CPD offers a good practicability and accuracy in image matching applications.

Paper Details

Date Published: 6 April 2015
PDF: 16 pages
J. Appl. Remote Sens. 9(1) 095085 doi: 10.1117/1.JRS.9.095085
Published in: Journal of Applied Remote Sensing Volume 9, Issue 1
Show Author Affiliations
Songlin Liu, National Univ. of Defense Technology (China)
Gang Sun, National Univ. of Defense Technology (China)
Zhaodong Niu, National Univ. of Defense Technology (China)
Na Li, National Univ. of Defense Technology (China)
Zengping Chen, National Univ. of Defense Technology (China)

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