Fingerprint alignment method, fingerprint collection apparatus, fingerprint alignment apparatus

Abstract

The invention provides a method for fingerprint alignment, a fingerprint acquisition device and a fingerprint alignment device, wherein the method for the fingerprint alignment comprises the following steps of: extracting a knuckle line from a two-dimensional fingerprint image; calculating a position relation between the extracted knuckle line and a prestored knuckle line; and aligning the extracted knuckle line with the prestored knuckle line according to the position relation so that a fingerprint containing knuckle texture aligns with a prestored fingerprint. The method for the fingerprint alignment performs contrast calculation on the extracted knuckle line and the prestored knuckle line by extracting the knuckle line, and acquires an angle between the extracted knuckle line and the prestored knuckle line, thereby achieving the aim of aligning fingerprints by rotating the angle. The method only needs to realize the coincidence of the extracted knuckle line and the prestored knuckle line, avoids the complexity of the process that the prior method for the fingerprint alignment needs to match minutiaes, shortens the time of the fingerprint alignment, and improves the efficiency of the fingerprint alignment.

Description

technical field [0001] The invention relates to fingerprint technology, in particular to a fingerprint alignment method, a fingerprint collection device and a fingerprint alignment device. Background technique [0002] Currently, prior to fingerprint identification, the collected fingerprints are usually aligned with the pre-stored fingerprints. Because during the fingerprint collection process, the fingerprint collected this time may not be exactly aligned with the pre-stored fingerprint, refer to figure 1 , figure 1 is a schematic illustration of a misaligned fingerprint excluding knuckle lines. Therefore, the fingerprints collected this time need to be rotated and translated, and the fingerprints can be identified only after the fingerprints collected this time are aligned with the pre-stored fingerprints. [0003] The existing fingerprint alignment method is to find the minutiae points in the fingerprint on the finger pad collected by the existing fingerprint collecti...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for aligning fingerprints, a fingerprint collecting device, and a fingerprint aligning device, so as to solve the problem that the existing fingerprint collecting device only collects the texture on the finger pad, and uses the texture on the finger pad to perform fingerprint alignment. Quasi-process more complex issues

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