Fingerprint alignment method, fingerprint collection apparatus, fingerprint alignment apparatus

An alignment device and fingerprint collection technology, applied in instruments, character and pattern recognition, computer parts, etc., can solve the problems of complex fingerprint alignment process, shorten time, improve efficiency, and avoid complexity.

Active Publication Date: 2009-08-12
VIMICRO ELECTRONICS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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 th...

Method used

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  • Fingerprint alignment method, fingerprint collection apparatus, fingerprint alignment apparatus
  • Fingerprint alignment method, fingerprint collection apparatus, fingerprint alignment apparatus
  • Fingerprint alignment method, fingerprint collection apparatus, fingerprint alignment apparatus

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Embodiment Construction

[0034] The entire fingerprint identification process of the present invention includes: the process of collecting 3D fingerprints; the process of mapping the collected 3D fingerprints to a two-dimensional plane to obtain 2D fingerprints; the process of aligning 2D fingerprints with preset fingerprints; The process of fingerprint identification.

[0035] The invention mainly improves the process of collecting 3D fingerprints and the process of aligning 2D fingerprints with preset fingerprints to solve the problems in the prior art.

[0036] In "the process of collecting 3D fingerprints", it is proposed to use a touch switch to take images when collecting 3D fingerprints.

[0037] The fingerprint alignment method of the present invention adjusts the knuckle direction vector and the distance between the knuckle direction vector and the pre-stored knuckle line by extracting the knuckle line of the 3D fingerprint mapped to the plane, so as to achieve the purpose of more accurate fi...

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PUM

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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...

Claims

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Application Information

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IPC IPC(8): G06K9/00G06K9/20
Inventor 舒予
Owner VIMICRO ELECTRONICS CORP
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