Fingerprint verification method and apparatus based on global ridgeline

摘要

This invention refers to a fingerprint verification method and apparatus based on global ridgeline. Firstly, the invention search base point pair between the stored fingerprint template and the fingerprint template to be matched. The said base point pair is the positioning reference for position calibration between the stored fingerprint template and the fingerprint template to be matched. Secondly, generates fingerprint template after minutiae extraction with additional use of thinned global fingerprint ridgeline information. Then, observe the similarity of minutiae topological structure or the surrounding ridgeline distribution to determine base point pairs. Finally, align the two fingerprints through base point pair alignment. Calculate the matching ratio of the ridgelines to determine whether the two fingerprints match. The beneficial results of the present invention: By using global ridgeline information, the efficiency of searching & interference resistance capacity is greatly enhanced. In addition, the present invention overcomes the disadvantage of the fingerprint verification method based on minutiae, i.e. the difficulty to verify fingerprints with too few of minutiae points.