High-Accuracy Stereo Matching Based on Adaptive Ground Control Points

This paper proposes a novel high-accuracy stereo matching scheme based on adaptive ground control points (AdaptGCP). Different from traditional fixed GCP-based methods, we consider color dissimilarity, spatial relation, and the pixel-matching reliability to select GCP adaptively in each local suppor...

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Bibliographic Details
Published in:IEEE transactions on image processing 2015-04, Vol.24 (4), p.1412-1423
Main Authors: Chenbo Shi, Guijin Wang, Xuanwu Yin, Xiaokang Pei, Bei He, Xinggang Lin
Format: Article
Language:English
Subjects:
alternating updating
confidence map
Cost function
Educational institutions
Equations
ground control points
Image color analysis
Mathematical model
Reliability
Stereo matching
weighted median filter
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Summary:This paper proposes a novel high-accuracy stereo matching scheme based on adaptive ground control points (AdaptGCP). Different from traditional fixed GCP-based methods, we consider color dissimilarity, spatial relation, and the pixel-matching reliability to select GCP adaptively in each local support window. To minimize the global energy, we propose a practical solution, named as alternating updating scheme of disparity and confidence map, which can effectively eliminate the redundant and interfering information of unreliable pixels. The disparity values of those unreliable pixels are reassigned with the information provided by local plane model, which is fitted with GCPs. Then, the confidence map is updated according to the disparity reassignment and the left-right consistency. Finally, the disparity map is refined by multistep filers. Quantitative evaluations demonstrate the effectiveness of our AdaptGCP scheme for regularizing the ill-posed matching problem. The top ranks on Middlebury benchmark with different error thresholds show that our algorithm achieves the state-of-the-art performance among the latest stereo matching algorithms. This paper provides a new insight toward high-accuracy stereo matching.
ISSN:1057-7149
1941-0042
DOI:10.1109/TIP.2015.2393054