Finger print identifying method based on broken fingerprint detection

A fingerprint recognition, fingerprint technology, applied in character and pattern recognition, instruments, computer parts and other directions, can solve the problems of undiscovered reports and patents, etc.

Inactive Publication Date: 2005-03-02
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, in all available patents or published documents, no similar reports and patents have been found

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  • Finger print identifying method based on broken fingerprint detection
  • Finger print identifying method based on broken fingerprint detection
  • Finger print identifying method based on broken fingerprint detection

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0137] Our invention can be implemented on ordinary PC computers, and there is no requirement for the operating system.

[0138] (1) Broken grain detection

[0139] With the increase of age, people's fingerprints will have broken lines due to skin wrinkles, which will have a great impact on fingerprint recognition. Previous fingerprint recognition methods have no targeted processing methods. We adopt a new idea and propose to remove false details through the detection of broken lines. The technology is very beneficial to the fingerprint identification application of the elderly population.

[0140] We mainly consider the significant broken lines, which satisfy: 1) have a large enough aspect ratio, so that the naked eye can observe the broken lines as band-shaped areas, rather than some spherical noise; 2) broken lines and normal texture of fingerprints There is an angle between the directions.

[0141] Figure 5 gives a specific example, describing the intermediate results ...

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Abstract

The invention is a fingerprint discriminating method based on broken design detection which belongs to fingerprint identification field. Its character lies in: it carries on broken design detection to detail points extracted with traditional method with 12 groups of best filter, each filter has a discrete value of an angle between the broken design direction and the X axis; works out the filter value under the 12 groups of broken design directions and sets a uniform floor level, acquires 12 groups of binary image, then the stripe region is displayed with rectangular with primary cell analysis method of matrix, and the region is parameterized with length, width and direction of the rectangular; all the binary images are combined together and a real broken design image is acquired, the parameterized images are combined and a broken design model is acquired in order to eliminate the false detail points. To the old people, with the same error reception rate, the fault refusing rate can be decreased to less than 10%.

Description

technical field [0001] The invention relates to the technical field of fingerprint identification, in particular to a technology for processing and identifying fingerprints with broken lines. Background technique: [0002] In modern society, the requirement for fast, effective and automatic personal identification is increasingly urgent. Security of important departments, border control, immigration inspection, entry and exit of confidential or valuables storage places, prevention of credit card fraud, network security, etc. all require reliable identification. personal identification. In the basis of identity verification, keys and certificates may be lost, stolen or copied, and passwords are easily forgotten, confused or peeped, and biometrics (including fingerprints, faces, hand shapes, handwritten signatures, irises, etc.) Inherent attributes of human beings, they do not appear in the above situation, so they become the most ideal basis for discrimination. Among them, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/00
Inventor 周杰吴南南杨春宇
Owner TSINGHUA UNIV
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