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 similarity of minutiae
topological structure or surrounding ridgeline distribution to determine
base point pairs. Finally, align two fingerprints through base point pair
alignment. Calculate matching ratio of ridgelines to determine whether
two fingerprints match. Beneficial results of present invention: By using
global ridgeline information, efficiency of searching & interference
resistance capacity is greatly enhanced. Present invention overcomes
disadvantage of fingerprint verification method based on minutiae, i.e.
difficulty to verify fingerprints with too few minutiae points.