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Fingerprint checking method and finger print checking device

A fingerprint and fingerprint image technology, applied in the field of fingerprint verification and fingerprint verification devices, can solve the problems of increasing processing load, complicated encryption and decryption management, etc., and achieve the effect of improving accuracy

Active Publication Date: 2007-02-14
138 EAST LCD ADVANCEMENTS LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the case of using encryption keys and decryption keys, the management of keys used for encryption and decryption is very cumbersome.
In addition, since the fingerprint verification process necessary for personal authentication is also performed on the basis of the image decryption process, the processing load is increased.

Method used

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  • Fingerprint checking method and finger print checking device
  • Fingerprint checking method and finger print checking device

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Experimental program
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Embodiment Construction

[0086] Hereinafter, good embodiments of the present invention will be described in detail with reference to the drawings. In addition, the embodiments described below are not intended to limit the present invention, and the essential components of the present invention are not limited to all the structures described below.

[0087] 1. Fingerprint verification method

[0088] in figure 1 The outline of the fingerprint verification process flow of the following embodiment is shown in. In the fingerprint verification process described below, the acquired fingerprint image is used for verification. Therefore, first, a fingerprint image is acquired (step S10). Then, extract N from the acquired fingerprint image D (N D Is an integer greater than 4) feature points (collection feature points) (step S11).

[0089] in figure 2 , Shows a diagram explaining the feature points extracted from the fingerprint image. in figure 2 Here, the fingerprint image represents the shape of the ridgeline...

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PUM

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Abstract

ND (where ND is integer larger than 4) sampled feature points from the sampled fingerprint image. The sampled value information of the sampled number groups are obtained by connecting lines of the feature points and the most of the LD (where 2 <= LD <= ND-1, LD is integer) sampled neighboring feature points regarding each sampled feature point and are attached to each of the sampled feature points. Based on the comparison result of the said sampled value information and the registered value information of the registered value groups for NR (where NR is integer greater than 4) registered feature points, map the m (where 3 <= m <= ND, m is integer) sampled feature points to m registered feature points to compare the position relationship among the said m sampled featured points and the position relationship among the said m registered feature points.

Description

Technical field [0001] The invention relates to a fingerprint verification method and a fingerprint verification device. Background technique [0002] In fields where confidentiality is required to be maintained, such as electronic settlement, fingerprints are sometimes used for authentication in order to identify individuals. In the authentication process, such as inputting an image of a fingerprint. In this case, according to the program processing, the secret key and the public key are used as a pair, and the encrypted fingerprint image is decrypted and verified to improve confidentiality. [0003] On the other hand, feature points can be extracted from the input fingerprint image. Here, the characteristic points of the fingerprint image are, for example, the branch points and end points of the ridgeline of the fingerprint. The distribution of feature points like this is different for each fingerprint. Therefore, it is possible to perform personal identification through a fing...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/00G06T7/00G06K9/00
CPCG06K9/00087G06V40/1365G06V40/1347G06V40/1306
Inventor 宫坂光敏
Owner 138 EAST LCD ADVANCEMENTS LTD