Patent ID: 7349560

Claim:
A fingerprint verification device for verifying fingerprint data with filed fingerprint data, comprising: analysis means for analyzing said fingerprint data to determine a verification scheme for verifying said fingerprint data; and execution means for verifying said fingerprint data using said determined verification scheme, wherein said analysis means is configured to: check, for all filed fingerprint feature points included in fingerprint data being searched, whether any feature point lies in a coordinate reference point vicinity coordinate range which provides a coordinate range of a coordinate reference point vicinity coordinate range radius with a coordinate reference point designated as a center; if any feature point lies in a coordinate reference point vicinity coordinate range, then check whether the feature point type is a singular point and a quality category is significant or normal; if said check results are positive, calculate: a low confidence rate for a group of vicinity feature points located in a coordinate reference point vicinity coordinate range which provides a coordinate range of a coordinate reference point vicinity coordinate range radius with a coordinate reference point designated as a center; an average reliability frequency for a group of vicinity feature points located in a vicinity coordinate range of a radius with a coordinate reference point designated as a center; and a clarity rate of any zone area in a fingerprint impression image for a group of vicinity feature points located in a coordinate reference point vicinity coordinate range of a coordinate reference point vicinity coordinate range radius with a coordinate reference point designated as a center; check whether: the calculated low-confidence rate of a group of vicinity feature points is below a low-confidence rate threshold; the calculated average reliability frequency is equal to or more than a average reliability frequency threshold; and the calculated zone clarity rate is equal to or more than a zone clarity rate threshold; if the check results meet all the positive conditions, selects an axis verification scheme; and if not, selects an alignment verification scheme.