Abstract: A method for automatic matching of planar point patterns in a reference pattern with a test pattern includes course mating, calculation of a mated possibility for one point in each pattern, preliminary selection of mated pairs based on these possibilities, and calculation of a similarity value based upon the number of mated pairs, the mated rate of the reference and test patterns, and the average mating possibility and average distance between mated points.

Abstract: A method for automatic matching of planar point patterns in a reference pattern with a test pattern includes course mating, calculation of a mated possibility for one point in each pattern using fuzzy relaxation, preliminary selection of mated pairs based on these possibilities, and calculation of a similarity value based upon the number of mated pairs, the mated rate of the reference and test patterns, and the average mating possibility and average distance between mated points.

Abstract: A method and a device for the automatic matching of seal prints including a first memory to store reference seal prints, an input device to obtain the image of a test seal print, a second memory to store the test seal print, an image structure similarity calculation device to calculate the similarity in the structure of the image of the reference seal print and the test seal print, a line distribution similarity calculation device to calculate the similarity in the distribution of the lines in the reference seal print and the test seal print, an incompleteness calculation device to calculate the incompleteness of the image of the reference seal print and the test seal print, and a determination device to determine whether the two seal prints are from the same source according to a pre-determined threshold.

Abstract: A method to automatically find out the actual position of the core point of a finger print by using the characteristic of the ridge flow of finger prints. This method comprises three parts: (1) ridge flow finding algorithm, (2) ridge flow correction algorithm and (3) core point allocation algorithm.