Patent ID: 7856128
Filing Date: 2010-12-21
Classification: G06K

Abstract:
1. A method of correcting distortion caused by fingerprint input sensors of heterogeneous fingerprint recognition systems, the method comprising: a first step of fabricating a Flat Artificial Finger Pattern (FAFP) for measuring resolutions of a fingerprint input sensor; a second step of measuring image resolutions of an image, acquired by the fingerprint input sensor, using the fabricated Flat Artificial Finger Pattern (FAFP) for predetermined locations and directions; a third step of designing control lines for compensating for distortion caused by the fingerprint input sensor, based on the measured resolutions; a fourth step of obtaining average horizontal resolutions and average vertical resolutions of the acquired image; a fifth step of modeling the control lines based on a ratio of the average horizontal resolution to the average vertical resolution; and a sixth step of compensating for a distortion of the acquired image based on results of the modeling.