A fingerprint matching method based on minutiae and ridges

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 of attributions of and topological relationship among minutiae and their adjacent ridges. The final matching result was synthetically judged by the matching results in step-matching. Experiments show that the algorithm presented can achieve excellent matching result in partial and/or distorted fingerprint matching.