A Coarse-to-Fine Method for Shape Recognition

In this paper the deformation invariant curve matching problem isaddressed. The proposed approach exploits an image pyramid to constraincorrespondence search at a finer level with those at a coarser level.In comparison to previous methods, this approach conveys much richerinformation: curve topology, affine geometry and local intensity arecombined together to seek correspondences. In experiments, the method istested in two applications, contour matching and shape recognition,and the results show that the approach is effective under perspective andarticulated deformations.