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A live iris anti-counterfeiting method for identity authentication

An identity authentication and iris technology, which is applied in the fields of instruments, acquisition/identification of eyes, computing, etc., can solve the problems of pseudo-iris interference in the iris authentication system, achieve social and economic security, improve applicability, and solve the increase of ineffective feature extraction rate. Effect

Inactive Publication Date: 2019-02-05
XI AN JIAOTONG UNIV +1
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  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

However, despite the many advantages of iris recognition, iris authentication systems are susceptible to interference from false irises

Method used

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  • A live iris anti-counterfeiting method for identity authentication
  • A live iris anti-counterfeiting method for identity authentication
  • A live iris anti-counterfeiting method for identity authentication

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Embodiment Construction

[0042] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0043] see figure 1 , the living iris anti-counterfeiting method of the present invention discriminates the authenticity of the iris image by the following methods:

[0044] Use the iris' absorption characteristics of infrared light of a specific wavelength to detect the iris in vivo; according to the pupil zoom, set the natural light (500nit) and the dark room (10nit) two situations, the human pupil will have obvious changes, but the false iris will not change; through Multi-directional 2D Log-Gabor filtering is performed on the iris image, and the difference of mutual information in each direction of the feature area is obtained by using the texture feature change of the true and false iris as the characteristic value for distinguishing the authenticity.

[0045] Based on the detection method of pupil contraction change, by obtaining the screen brightness in...

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Abstract

A living iris anti-counterfeiting method for identity authentication, comprising: 1) obtaining a true and false iris image and performing image preprocessing; said image preprocessing includes positioning the inner boundary and outer boundary of the image, iris image by normalization Expand to a uniform size and enhance the normalized iris image; 2) Discriminate the authenticity of the iris image through the following aspects; 2.1) Use the infrared characteristic spectrum of living tissue to detect the iris in vivo; 2.2) According to the dynamics of the human eye 2.3) Use iris texture features to detect iris living body; perform multi-directional filtering on the iris image, and calculate the difference between the mutual information of the iris outer and inner image of the feature area after filtering in each direction as the texture feature value. If the sum of the values ​​is less than the set threshold, it is true iris, otherwise it is false iris. The detection result of this method is accurate and reliable, with strong robustness and wide application range.

Description

technical field [0001] The invention relates to a biometric identification technology, in particular to an anti-counterfeiting method for a living iris used for identification. Background technique [0002] At present, iris has been widely studied and applied to identity authentication systems due to its special structure and non-contact sampling mode. Physiological features commonly used in biometric identification include fingerprints, palm prints, faces, irises, auricles, and retinas. Among them, the iris, as an important identification feature, has the advantages of uniqueness, stability, and non-invasiveness. It is an ideal biometric feature for identity verification and is widely used in banking, social welfare, e-commerce, security and defense. , smart phone bank payment system and other fields. However, despite the many advantages of iris recognition, iris authentication systems are susceptible to interference from false irises. [0003] At present, the more commo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06K9/00
CPCG06V40/193G06V40/197G06V40/45
Inventor 张新曼何婷婷陈奕宇许学斌
Owner XI AN JIAOTONG UNIV