Abstract ;The gesture adjustment and the match of the seal image are studied. An approach for the seal image matching based on DT grid is proposed. After the topological structures of two minutiae which are based on line and polygon are triangulated and the minutiae taken from the template and the query seal images are joined, the DT grid is gained. Firstly, the Delaunay point set triangulation cutting algorithm is used to triangulate the minutiae based on line, while the polygon triangulation cutting algorithm is employed to triangulate the minutiae based on polygon. Then the reference junction pairs are obtained by searching two trigonal nets. Finally, the query seal image is adjusted according to the templated seal image with parameters computed from the reference junction pairs and the match score is caculated using a simply match algorithm. Simulation results show that the proposed method gets more reference points and the accuracy of rotating and translating parameters of the seal imprint is also ensured.
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2007, Vol. 20 
