Patent ID: 6314197
Filing Date: 2001-11-06
Classification: G06K

Abstract:
A computer system for matching fingerprints, comprising:a computer having a user interface, a central processing unit (CPU), a disk storage that contains a plurality of data records representing one or-more fingerprint images and an image capturing subsystem that produces an image of a target fingerprint;a first image stored in the memory, the first image having one or more first points each of the first points located on a respective first curved line;one or more second images stored in the memory, the second image having one or more second points each of the second points located on a respective second curved line;a reference point matcher, executed by the CPU, that determines a correspondence between a first corresponding point in the first image and a second corresponding point in the second image, the first corresponding point being one of the first points and the second corresponding point being one of the second points; andan alignment estimator that estimates alignment between the first image and the second image by determining an angle between a first curved line on which the first corresponding point lies in the first image and a second curved line on which the second corresponding point lies in the second image and the alignment estimator further determining a translation vector between a first vector point on the first curved line and a second vector point on the second curved line.