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Fingerprint identification method and fingerprint identification device

A fingerprint identification and fingerprint technology, applied in the field of biometrics, can solve problems such as inability to accurately express details, achieve the effect of avoiding instability and low specificity, and improving accuracy

Active Publication Date: 2014-11-19
SHENZHEN GOODIX TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the embodiments of the present invention is to provide a fingerprint recognition method and a fingerprint recognition device thereof, aiming to solve the problem that the existing fingerprint recognition method cannot accurately express the minutiae when the fingerprint is deformed

Method used

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  • Fingerprint identification method and fingerprint identification device
  • Fingerprint identification method and fingerprint identification device

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Experimental program
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Effect test

Embodiment 1

[0071] Embodiment 1 of the present invention proposes a fingerprint identification method. Such as figure 2 As shown, the method of Embodiment 1 of the present invention includes the following steps:

[0072] S1. Input a fingerprint image.

[0073] S2. Fingerprint preprocessing. That is, preparatory processing is performed on the input fingerprint image before the actual application, and the input fingerprint image is converted into the form we want, such as image 3 shown, including steps:

[0074] S21. Calculation of the fingerprint image field

[0075] To identify the fingerprint part of the input image, the image field is first analyzed. Image fields include intensity fields, gradient fields, and direction fields, among others. The so-called intensity field is the information that reflects the intensity of a certain point in the fingerprint image; the so-called gradient field is the direction in which the function grows fastest, and the gradient is a vector. The exp...

Embodiment 2

[0130] Embodiment 2 of the present invention provides a fingerprint identification device. Such as Figure 14 As shown, the device of Embodiment 2 of the present invention includes:

[0131] The extraction module 10 is used to extract the minutiae points of the input fingerprint pattern using a statistical method;

[0132] The matching module 20 is configured to perform fingerprint matching according to the extracted minutiae points to obtain a fingerprint identification result.

[0133] After the fingerprint image is input, the device for fingerprint identification firstly performs preprocessing on the fingerprint. That is, preparatory processing is performed on the input fingerprint image before the actual application, and the input fingerprint image is converted into the form we want.

[0134] Specifically include:

[0135] Computation of Fingerprint Image Field

[0136] To identify the fingerprint part of the input image, the image field is first analyzed. Image fiel...

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Abstract

The invention is applicable to the technical field of biological identification, and provides a fingerprint identification method and a fingerprint identification device. The method comprises the following steps: minutiae of an input fingerprint pattern are extracted by a statistical method; and fingerprint matching is carried out according to the extracted minutiae to obtain a fingerprint identification result. According to the method provided by the embodiment of the invention, the directions of the minutiae are calculated based on statistical information, a statistically significant descriptor is added for the minutiae, and the steps of minutiae similarity calculation with the use of the descriptor and region matching with the use of orientation field and gradient field information of an overlap region are added in the matching process. Therefore, instability and poor specificity of fingerprint feature expression in a traditional algorithm are avoided, and the accuracy of fingerprint identification is improved.

Description

technical field [0001] The invention belongs to the technical field of biological identification, and in particular relates to a fingerprint identification method and a fingerprint identification device thereof. Background technique [0002] With the rapid development of technology and Internet technology, we are more and more using some resources of the network, and more and more personal information is input on the network. The leakage of personal information has always been a problem to be solved. In recent years, biometrics People pay more and more attention to technology because fingerprints are unique and stable. Traditional fingerprint recognition methods such as figure 1 As shown, it includes fingerprint preprocessing, fingerprint minutiae extraction, fingerprint registration and matching. In order to increase the information of minutiae when extracting fingerprint minutiae, in addition to recording the position and direction of minutiae, three parameters are added....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/00
CPCG06V40/1353G06V40/1371G06V10/758G06V10/761G06F18/22G06V40/1365
Inventor 李洪生徐洪伟叶金春
Owner SHENZHEN GOODIX TECH CO LTD
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