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Attributions including the type of minutiae, the curvature of ridge, the length ratio of 2 line segments of ridge and the relative topological relationship among minutiae and ridges were used in partial and/or nonlinear distorted fingerprint matching. Three kinds of criterions were defined to describe the pattern of fingerprint. Fingerprint was matched in steps according to the criterions consist...
The relative topological relationship among minutiae was used in fingerprint matching for its changeless characteristics in distorted fingerprints. Each minutia was defined by a characteristic record in which the minutia type and the relative topological relationship among the minutia and its 5 nearest neighbors are included. The fingerprints matched or not depend on the number of minutiae matched...
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