Image and Signal Processing Methods

Gaussian mixed model in support of semiglobal matching leveraged by ground control points

[+] Author Affiliations
Hao Ma, Yingsong Li

Wuhan University, School of Remote Sensing, Wuhan, China

Shunyi Zheng

Wuhan University, School of Remote Sensing, Wuhan, China

Collaborative Innovation Center of Geospatial Technology, Wuhan, China

Chang Li

Central China Normal University, College of Urban and Environmental Science, Key Laboratory for Geographical Process Analysis and Simulation, Hubei Province, Wuhan, China

Li Gui

Wuhan University, School of Remote Sensing, Wuhan, China

Collaborative Innovation Center of Geospatial Technology, Wuhan, China

Wuhan University, School of Electronic Information, Wuhan, China

J. Appl. Remote Sens. 11(2), 025014 (Jun 23, 2017). doi:10.1117/1.JRS.11.025014
History: Received March 16, 2017; Accepted June 7, 2017
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Abstract.  Semiglobal matching (SGM) has been widely applied in large aerial images because of its good tradeoff between complexity and robustness. The concept of ground control points (GCPs) is adopted to make SGM more robust. We model the effect of GCPs as two data terms for stereo matching between high-resolution aerial epipolar images in an iterative scheme. One term based on GCPs is formulated by Gaussian mixture model, which strengths the relation between GCPs and the pixels to be estimated and encodes some degree of consistency between them with respect to disparity values. Another term depends on pixel-wise confidence, and we further design a confidence updating equation based on three rules. With this confidence-based term, the assignment of disparity can be heuristically selected among disparity search ranges during the iteration process. Several iterations are sufficient to bring out satisfactory results according to our experiments. Experimental results validate that the proposed method outperforms surface reconstruction, which is a representative variant of SGM and behaves excellently on aerial images.

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© 2017 Society of Photo-Optical Instrumentation Engineers

Citation

Hao Ma ; Shunyi Zheng ; Chang Li ; Yingsong Li and Li Gui
"Gaussian mixed model in support of semiglobal matching leveraged by ground control points", J. Appl. Remote Sens. 11(2), 025014 (Jun 23, 2017). ; http://dx.doi.org/10.1117/1.JRS.11.025014


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