Patent ID: 7853047
Filing Date: 2010-12-14
Classification: G06K

Abstract:
1. A system for recognizing a fingerprint ridge, the system comprising: a ridge direction extracting unit configured to extract a longitudinal direction of a ridge from a fingerprint image; a first false feature analyzing unit configured to classify a plurality of ridges into true ridges and incipient ridges based on an analysis of an incipient feature pattern of said plurality of ridges in a direction crossing to said longitudinal direction; an incipient ridge density correcting unit configured to generate a corrected image data by approximating densities of pixels classified as said incipient ridges close to a density of a valley of said fingerprint image; a true ridge area extracting unit configured to extract a true ridge area in which a rate of pixels belonging to said true ridge is higher than a predetermined condition as a true ridge area; and a true ridge accentuating unit configured to correct density of a pixel belonging to said true ridge area to a density of a pixel that is in a neighboring area and has a higher density, wherein said incipient feature pattern includes a width of each of said plurality of ridges, or an average value of densities of nearby pixels arranged in said longitudinal direction.