Method of and device for identification of fingermarks
First Claim
Patent Images
1. A method of identification of a fingermark, comprising obtaining for a fingermark a fingermark image;
- storing reference fingermarks in a databank;
comparing the obtained fingermark image with the reference fingermarks for identification;
before the identification determining for each reference fingermark in comparison with the obtained fingermark image a similarity degree;
sorting the reference fingermarks in the databank in accordance with the similarity degree; and
performing the identification of the fingermark beginning with the reference fingermark which leads to a greatest similarity degree; and
placing square areas around a reference point of the obtained fingermark;
multiplying the area with window function;
transforming the area by means of a first integral transform in a space frequency region;
determining features in the areas of the reference point;
evaluating for the features the space frequencies in accordance with amount and direction; and
determining by the features of the obtained fingermark and the reference fingermark correspondingly the similarity degree for the corresponding reference fingermark.
1 Assignment
0 Petitions
Accused Products
Abstract
Identification of a fingermark is performed by obtaining for a fingermark a fingermark image, storing reference fingermarks in a databank, comparing the obtained fingermark image with the reference fingermarks for identification, before the identification determining for each reference fingermark in comparison with the obtained fingermark image a similarity degree, sorting the reference fingermarks in the databank in accordance with the similarity degree, and performing the identification of the fingermark beginning with the reference fingermark which leads to the greatest similarity degree.
-
Citations
6 Claims
-
1. A method of identification of a fingermark, comprising obtaining for a fingermark a fingermark image;
- storing reference fingermarks in a databank;
comparing the obtained fingermark image with the reference fingermarks for identification;
before the identification determining for each reference fingermark in comparison with the obtained fingermark image a similarity degree;
sorting the reference fingermarks in the databank in accordance with the similarity degree; and
performing the identification of the fingermark beginning with the reference fingermark which leads to a greatest similarity degree; and
placing square areas around a reference point of the obtained fingermark;
multiplying the area with window function;
transforming the area by means of a first integral transform in a space frequency region;
determining features in the areas of the reference point;
evaluating for the features the space frequencies in accordance with amount and direction; and
determining by the features of the obtained fingermark and the reference fingermark correspondingly the similarity degree for the corresponding reference fingermark. - View Dependent Claims (2, 3, 4, 5, 6)
- storing reference fingermarks in a databank;
Specification