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Broken grain splicing method

A technology of breakpoints and fingerprints, which is applied in the field of splicing of broken lines, can solve problems such as loss of effectiveness, wrong splicing, small spacing between fingerprint lines, etc., and achieve the effect of improving effectiveness, increasing pass rate, and reducing false feature points

Inactive Publication Date: 2010-12-01
开店宝支付服务有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the distance between the fingerprint lines is often relatively small, and when the broken lines are relatively wide, there are often cases of wrong splicing
It can be seen that this method has certain limitations, it can only deal with very narrow broken lines, and for wider broken lines, this method will lose its effectiveness

Method used

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Embodiment Construction

[0039] In order to make the technical features of the present invention more obvious and understandable, the present invention will be further described below in conjunction with specific embodiments.

[0040] Please refer to figure 1 , which is a schematic flow chart of a broken grain splicing method provided by an embodiment of the present invention. The method is used to process a fingerprint image with broken lines, as shown in the figure, including the following steps:

[0041] S1: Obtain the orientation map of the fingerprint image;

[0042] S2: According to the fingerprint image and its orientation map, calculate the period of the broken line ridge and the curvature of the broken line;

[0043] S3: Delineate the effective area of ​​the broken-line ridge according to the period of the broken-line and the curvature of the broken-line;

[0044] S4: In the effective area, fit the fracture ridge line.

[0045] The above method is different from the prior art. It uses the...

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PUM

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Abstract

The invention discloses a broken grain splicing method which is used for processing a fingerprint image with broken grains and comprises the following steps of: 1. obtaining a directional diagram of the fingerprint image; 2. computing a broken grain ridgeline period and a broken grain curvature according to the fingerprint image and the directional diagram thereof; 3. drawing the effective area of a broken grain ridgeline according to the broken grain ridgeline period and the broken grain curvature; and 4. fitting the broken grain ridgeline in the effective area. By adopting the broken grain splicing method, the broken grains can be effectively spliced, false characteristic points caused by the broken grains are greatly decreased, the validity of fingerprint characteristic point matching is further improved, and meanwhile, because the broken grains are effectively spliced, the passing rate of ridgeline comparison is improved.

Description

technical field [0001] The invention relates to the field of fingerprint identification, in particular to a method for splicing broken lines. Background technique [0002] With the progress of society, people pay more and more attention to the security of identification. Traditional identification often uses certificates, passwords and other methods. However, credentials can be lost or copied; passwords can be easily forgotten or confused. Especially with the advent of the Internet era, more and more password settings are bothering people: power-on passwords, email passwords, bank passwords, forum passwords... For these, if the same password is set, it will increase security risks ; If different passwords are set, it will cause trouble for password management. For this reason, identification technology based on biometrics (such as fingerprints, faces, irises, etc.) is gaining more and more attention. Among them, fingerprint recognition has a high recognition rate and is ...

Claims

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Application Information

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IPC IPC(8): G06K9/00G06K9/36G06K9/46
Inventor 刘君
Owner 开店宝支付服务有限公司
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