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Small-size fingerprint image recognition method

A fingerprint image and recognition method technology, which is applied in the field of small-size fingerprint image recognition, can solve the problems of small size, poor recognition effect, and insufficient number of detail points, etc.

Pending Publication Date: 2021-03-26
CHIPONE TECH BEIJINGCO LTD
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AI Technical Summary

Problems solved by technology

[0003] However, the fingerprint images collected by fingerprint recognition applications in the mobile phone field are often small in size. The traditional fingerprint recognition method uses the extraction of minutiae points for matching. For small-sized images, the number of minutiae points is insufficient, resulting in poor recognition results.

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  • Small-size fingerprint image recognition method

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Embodiment Construction

[0052] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention.

[0053] refer to Figure 1-6 , a small-size fingerprint image recognition method, comprising the following steps:

[0054] S1: Obtain a template image, and enter multiple fingerprint images as the template image;

[0055] S2: Get the input image, and get the input fingerprint image through the fingerprint collector.

[0056] S3: Image feature extraction, feature extraction of fingerprint images and template images based on corner points and direction fields;

[0057] S4: Similarity feature calculation, matching the acquired fingerprint image features with the features of all template images one by one, performing similarity calculation on the features of the fingerp...

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Abstract

The invention discloses a small-size fingerprint image recognition method, and the method comprises the following steps: obtaining a template image, and inputting a plurality of fingerprint images asthe template image; obtaining an input image, and obtaining an input fingerprint image through a fingerprint collector; image feature extraction: carrying out feature extraction on the fingerprint image and the template image based on angular points and a direction field; and carrying out similarity feature calculation. According to the invention, fingerprint unlocking is achieved by supporting asmall-size sensor of an embedded device, access restriction is provided, one-by-one matching analysis is carried out by inputting a plurality of template images, the accuracy of fingerprint matching analysis is improved, the matching speed is improved by using a binarization descriptor, and the template images are sorted according to the matching success times, sequential one-by-one matching analysis is achieved, the matching efficiency is improved, the template images with low identification scores are deleted according to storage requirements, and better fingerprint unlocking speed and accuracy are provided under limited calculation and storage capacities.

Description

technical field [0001] The invention relates to the technical field of fingerprint biological feature identification, in particular to a small-size fingerprint image identification method. Background technique [0002] Fingerprint identification technology is one of many biometric identification technologies. The so-called biometric identification technology refers to the use of the inherent physiological characteristics or behavioral characteristics of the human body for personal identification. Fingerprint identification is to classify and compare the fingerprints of the identification objects. As one of the biometric identification technologies, fingerprint identification technology has gradually matured in the new century and entered the field of human production and life. In recent years, fingerprint identification technology has developed rapidly and is a relatively mature one among many biometric identification technologies. Identification methods, and with the advent...

Claims

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Application Information

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IPC IPC(8): G06K9/00G06K9/46G06K9/62
CPCG06V40/1347G06V40/13G06V40/1365G06V10/44G06V10/751G06F18/22
Inventor 宋子明
Owner CHIPONE TECH BEIJINGCO LTD
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