Weighted Semi-Global Matching and Center-Symmetric Census Transform for Robust Driver

Tobias Langner, Raúl Rojas— 2013

Automotive applications based on stereo vision require robust and fast matching algorithms, which makes semi-global matching (SGM) a popular method in this field. Typically the Census transform is used as a cost function, since it is advantageous for outdoor scenes. We propose an extension based on center-symmetric local binary patterns, which allows better efficiency and higher matching quality. Our second contribution exploits knowledge about the three-dimensional structure of the scene to selectively enforce the smoothness constraints of SGM. It is shown that information about surface normals can be easily integrated by weighing the paths according to the gradient of the disparity. The different approaches are evaluated on the KITTI benchmark, which provides real imagery with LIDAR ground truth. The results indicate improved performance compared to state-of-the-art SGM based algorithms.

TitelWeighted Semi-Global Matching and Center-Symmetric Census Transform
VerfasserTobias Langner, Raúl Rojas
VerlagSpringer-Verlag *Best paper award*
Themastereo vision, matching costs, census transform, local binary pattern, semi-global matching
Erschienen inProceedings of the "15th International Conference on Computer Analysis of Images and Patterns (CAIP 2013)", York, United Kingdom.
Größe oder Länge34-41
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