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Small-area fingerprint image feature extraction method and system, terminal and storage medium

A fingerprint image and feature extraction technology, which is applied in the acquisition/organization of fingerprints/palmprints, instruments, characters and pattern recognition. degree of effect

Active Publication Date: 2020-07-17
深圳市诺赛特系统有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The first object of the present invention is to provide a small-area fingerprint image feature extraction method to solve the problem of insufficient extraction of small-area fingerprint feature information, which is effectively suitable for small-area fingerprint comparison and has good reliability

Method used

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  • Small-area fingerprint image feature extraction method and system, terminal and storage medium
  • Small-area fingerprint image feature extraction method and system, terminal and storage medium
  • Small-area fingerprint image feature extraction method and system, terminal and storage medium

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Embodiment 1

[0064] refer to figure 1 and figure 2 , is a small-area fingerprint image feature extraction method disclosed in the present invention, which is applied to the extraction of small-area fingerprint feature information to realize effective, stable and reliable extraction of small-area fingerprint feature information, specifically comprising the following steps:

[0065] Step S1, acquiring a fingerprint image.

[0066] Specifically, the fingerprint image is obtained through the fingerprint sensor. The fingerprint sensor used in this solution is an ordinary fingerprint sensor instead of a fingerprint sensor based on high-precision resolution, so as to reduce the implementation cost in this solution. The existing high-precision resolution based High-resolution fingerprint sensors can identify information such as sweat pores, ridges and concave points at high resolution, and use this information to complete fingerprint feature extraction. This kind of high-resolution fingerprint s...

Embodiment 2

[0111] refer to Figure 7 , in one embodiment, a small-area fingerprint image feature extraction system is provided that corresponds one-to-one to the small-area fingerprint image feature extraction method in the first embodiment above, and is applied to the extraction of small-area fingerprint feature information to realize small-area fingerprint feature information Effective, stable and reliable extraction, the system includes an image acquisition module 1, an image processing module 2, an extraction module 3 and a screening module 4. The detailed description of each functional module is as follows:

[0112] Image acquisition module 1, used to acquire fingerprint images;

[0113] The image processing module 2 is used to separate the foreground area and the background area of ​​the fingerprint image, obtain the data information of the foreground area, and perform classification filtering processing on the fingerprint image according to the data information of the foreground ...

Embodiment 3

[0119] In one embodiment, an intelligent terminal is provided, which includes a memory, a processor, and a computer program stored on the memory and operable on the processor, wherein the memory stores training data, algorithm formulas and filtering mechanisms in the training model Wait. The processor is used to provide computing and control capabilities, and the processor implements the following steps when executing a computer program:

[0120] Step S1, acquiring a fingerprint image;

[0121] Step S2, preprocessing the fingerprint image, separating the foreground area and the background area of ​​the fingerprint image, obtaining the data information of the foreground area, and performing classification and filtering processing on the fingerprint image according to the data information of the foreground area;

[0122] Step S3, extract key feature points, divide the fingerprint image into blocks, and select key feature points according to the data information of the foregroun...

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Abstract

The invention relates to a small-area fingerprint image feature extraction method and system, a terminal and a storage medium, belongs to the technical field of fingerprint identification, is appliedto small-area fingerprint feature information extraction, and comprises the following steps: S1, acquiring a fingerprint image; s2, preprocessing the fingerprint image, separating a foreground regionand a background region of the fingerprint image, obtaining data information of the foreground region, and performing classification filtering processing on the fingerprint image according to the datainformation of the foreground region; s3, extracting key feature points, performing block division on the fingerprint image, selecting the key feature points according to data information of a fingerprint image foreground area in a corresponding block, wherein the data information of the fingerprint image foreground area comprises curvature information of pixel points; and step S4, screening of key feature points: screening out the key feature points with good stability through comparative analysis. The method is used for solving the problem of insufficient extraction of small-area fingerprint feature information, is effectively suitable for small-area fingerprint comparison and has good reliability.

Description

technical field [0001] The invention relates to the technical field of fingerprint identification, in particular to a small-area fingerprint image feature extraction method, system, terminal and storage medium. Background technique [0002] Fingerprint recognition technology has been widely used in mobile phones, computers, smart door locks, cabinet locks, U disks, SSDs and other scenarios that require personal identification, and the function is not limited to unlocking, but also applied to other higher-level applications, such as online Payment, application encryption, business authorization, etc. At present, the large-area fingerprint recognition technology based on traditional minutiae points is relatively mature, but as more and more types of mobile devices use fingerprint recognition technology in the market, considering better integrated design, terminals tend to use small-area The fingerprint sensor, which leads to the smaller area of ​​the collected fingerprint ima...

Claims

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Application Information

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IPC IPC(8): G06K9/00
CPCG06V40/1347G06V40/1365
Inventor 杨密凯韩鹏飞
Owner 深圳市诺赛特系统有限公司
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