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Method for binaryzation of fingerprint image

A fingerprint image and processing method technology, applied in the field of fingerprint image binarization processing, can solve problems such as over-splicing

Inactive Publication Date: 2012-07-04
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

[0008] The object of the present invention is to provide a fingerprint image binarization processing method to solve the over splicing problem in the existing fingerprint image binarization processing process

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  • Method for binaryzation of fingerprint image
  • Method for binaryzation of fingerprint image
  • Method for binaryzation of fingerprint image

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Embodiment Construction

[0019] In order to make the above-mentioned features and advantages of the present invention more comprehensible, exemplary embodiments are given below together with accompanying drawings and described in detail as follows.

[0020] Fingerprint identification mainly includes preprocessing and extraction of fingerprint features. The reason why the preprocessing process is included is that when collecting fingerprints through the fingerprint collector, the image quality of the fingerprint image is not high or the fingerprint is deformed due to uneven force during the process of pressing the fingerprint, etc., often resulting in fingerprint image segmentation. Therefore, it is necessary to preprocess the collected fingerprint image firstly, including enhancement, binarization and thinning of the fingerprint image. After the preprocessing is completed, feature extraction can be carried out, and the extraction of feature points is directly related to the recognition rate. The pres...

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Abstract

The invention discloses a method for the binaryzation of a fingerprint image. The method comprises the following steps: acquiring the directional image of the fingerprint image; establishing a convolution mask comprising a plurality of matrixes; segmenting the fingerprint image into a plurality of sub-blocks; selecting matrixes from a convolution mask to convolute the sub-blocks one by one according to the directional image, so that the grey scale of the fingerprint image can be polarized; and carrying out the binaryzation on the polarized fingerprint image by using a threshold. Accordingly, the acquired binary image has the advantages of clear ridge and smooth boundary and is identical with an original image.

Description

technical field [0001] The invention relates to a fingerprint image preprocessing method, in particular to a fingerprint image binarization processing method. 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 recogni...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06K9/38G06V10/28
CPCG06K9/00067G06K9/38G06V40/1347G06V10/28
Inventor 陈晓峰刘君
Owner 开店宝支付服务有限公司