Fingerprint matching method, fingerprint matching device and fingerprint identification chip

A matching method and fingerprint technology, applied in character and pattern recognition, instruments, calculations, etc., can solve the problems of high numerical value and misrecognition, and achieve the effect of reducing the misrecognition rate, improving the accuracy, and reducing the wrong matching.

Active Publication Date: 2018-01-05
BYD SEMICON CO LTD
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

However, the disadvantage of the related technology is that the ridge score may also have a higher value when the ridges do not overlap, which may easily lead to misidentification.

Method used

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  • Fingerprint matching method, fingerprint matching device and fingerprint identification chip
  • Fingerprint matching method, fingerprint matching device and fingerprint identification chip
  • Fingerprint matching method, fingerprint matching device and fingerprint identification chip

Examples

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Embodiment Construction

[0044] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0045] The following describes the fingerprint matching method, the fingerprint identification device and the fingerprint identification chip proposed by the embodiments of the present invention with reference to the accompanying drawings.

[0046] Figure 2a is a flowchart of a fingerprint matching method according to an embodiment of the present invention. Such as Figure 2a As shown, the fingerprint matching method includes the following steps:

[0047] S1: Process the fingerprint image to be matched and the template finger...

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Abstract

The invention discloses a fingerprint matching method. The fingerprint matching method comprises steps of processing a fingerprint image to be matched and a template fingerprint image in order to findmatched characteristic points of the fingerprint image to be matched and the template fingerprint image, obtaining a rotation translation amount according to matched characteristic points, adjustingthe position of the fingerprint image to be matched according to the rotation translation amount in order to obtain an overlapping area of the two images, performing grain line comparison on pixel points in the overlapping area in order to obtain a grain line fraction, performing a direction field comparison on pixel points in the overlapping area in order to obtain a direction field fraction, calculating a comparison fraction according to the grain line fraction and the direction field fraction, and determining whether two fingerprint images are matched according to the comparison fraction. The fingerprint matching method, the fingerprint matching device and the fingerprint identification chip reduce wrong matching through combining the grain line identification and direction field comparison, reduce a false identification rate and improve fingerprint identification accuracy.

Description

technical field [0001] The invention relates to the technical field of fingerprint identification, in particular to a fingerprint matching method, a fingerprint matching device and a fingerprint identification chip. Background technique [0002] The fingerprint identification method in the related art uses a ridge line comparison method to perform fingerprint identification. However, the disadvantage of the related technology is that the ridge score may have a higher value when the ridges do not overlap, which may easily lead to misidentification. [0003] Therefore, related technologies need to be improved. Contents of the invention [0004] The inventors of the present invention have discovered and realized that: figure 1 As shown, when the ridges intersect vertically, the ridges have an overlap rate of nearly 50%, and when the fingerprints do not overlap at all, the overlap score is still nearly 50 points or higher, and may even exceed the threshold and cause misident...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/00
Inventor 雷磊李振刚徐坤平杨云
Owner BYD SEMICON CO LTD
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