Tenth IEEE International Conference on Computer Vision (ICCV'05) Volume 2
Robust Point Matching for Two-Dimensional Nonrigid Shapes
Beijing, China
October 17-October 20
ISBN: 0-7695-2334-X
Recently, nonrigid shape matching has received more and more attention. For nonrigid shapes, most neighboring points cannot mow independently under deformation due to physical constraints. Furthermore, the rough structure of a shape should be preserved under deformation, otherwise even people cannot match shapes reliably. Therefore, though the absolute distance between two points may change sign@cantl>;, the neighborhood of a point is well preserved in general. Based on this observation, we formulate point matching as a graph matching problem. Each point is a node in the graph, and two nodes are connected by an edge if their Euclidean distance is less than a threshold. The optimal match between two graphs is the one that maximizes the number of matched edges. The shape context distance is used to initialize the graph matching, followed by relaxation labeling for rejnement. Nonrigid deformation is overcome by bringing one shape closer 10 the other in each iteration using deformation parameters estimated from the current point correspondence. Experiments demonstrate the effectiveness of our approach: it outperforms the shape context and TPS-RPM algorithms under nonrigid deformation and noise on a public data set.
Citation:
Yefeng Zheng, David Doermann, "Robust Point Matching for Two-Dimensional Nonrigid Shapes," iccv, vol. 2, pp.1561-1566, Tenth IEEE International Conference on Computer Vision (ICCV'05) Volume 2, 2005