Point Symmetry based Corner Detector with Distance and Phase Weight Functions

E.-J. Park, J.-H. Kim, K.-S. Seo, and H.-M. Choi (Korea)


Point symmetry transform, Corner detector


A novel corner detection algorithm is proposed in this paper. After point symmetry transform of edge pixels in the area of local window by the corner point as center of symmetry, there is no intersection between the original edge pixels and the point symmetry transformed edge pixels for the corner. On the other hand, there must be at least one intersection point between them for the non corner. Corner detector that detects the exact locations of the real corners is proposed by using these corner properties. After corner candidates are extracted by point symmetry transform of the edge image, distance weight function and phase weight function eliminate false corners for the corner verification and the exact localization of the real corners.

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