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Protection method and protection device for finger vein characteristic cancelable template

A technology of feature templates and finger veins, which is applied in the protection of finger vein cancelable feature templates and protection devices for finger vein cancelable feature templates, can solve the problems of inability to guarantee recognition security, poor recognition performance, and high recognition performance. Improve revocation/reusability and diversity, improve recognition rate, and improve recognition performance

Active Publication Date: 2019-11-29
ANHUI UNIVERSITY
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Problems solved by technology

[0004] In order to solve the technical problem that the existing biometric template method with high recognition performance cannot guarantee the security of recognition, while the method for ensuring the security of the biometric template has poor recognition performance, the present invention provides a protection method for a finger vein feature template that can be cancelled. and its protective device

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  • Protection method and protection device for finger vein characteristic cancelable template
  • Protection method and protection device for finger vein characteristic cancelable template
  • Protection method and protection device for finger vein characteristic cancelable template

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Embodiment 1

[0077] see figure 1 as well as figure 2 , this embodiment provides a protection method for a finger vein feature template that can be canceled, which is implemented by feature extraction, generation of a cancelable template, matching and identification, and can improve the performance and security of the finger vein feature template. Wherein, the protection method of the finger vein deletable feature template in this embodiment includes the following three steps (steps (1)-(3)).

[0078] (1) Feature extraction is performed on the finger vein image of the finger vein sample. Wherein, the finger vein samples are test samples or training samples. In this embodiment, the size of the ROI of the finger vein cropped from the original image is 96*150. Wherein, the feature extraction method includes the following steps (steps (1.1)-(1.3)).

[0079] (1.1) Map the difference of each neighborhood in the finger vein image according to the direction angle to obtain the difference excit...

Embodiment 2

[0136] This embodiment provides a method for protecting a finger vein cancelable feature template, which is evaluated experimentally on the basis of Embodiment 1. In order to verify that the identification performance of the protection method is more effective and that the cancelable template is more strictly irreversible, this embodiment is described in four aspects: identification performance, diversity, revocation / reusability, and irreversibility.

[0137] (1) Recognition performance

[0138] The security of the finger vein can cancel the template, and it cannot be sacrificed at the expense of the recognition rate and the equal error rate. Validation performance is divided into good and poor cases. A good situation is that the same user generates a token through a random bit generator from the same seed during the registration phase and the verification phase. There are different tokens for different users and different applications. In the worst case, all users have the...

Embodiment 3

[0155] This embodiment provides a protection device for a finger vein deletable feature template, which adopts the protection method for a finger vein deletable feature template in embodiment 1 or embodiment 2. Wherein, the protection device of the finger vein cancelable feature template in this embodiment includes a feature extraction module, a cancelable template generation module and a matching recognition unit.

[0156] The feature extraction module is used for feature extraction of the finger vein image of the finger vein sample. Wherein, the finger vein sample is a test sample or a training sample, and the feature extraction module includes a differential excitation unit, a dual variable curvature filter unit, and a feature extraction unit. The differential excitation unit is used to map the difference of each neighborhood in the finger vein image according to the direction angle to obtain the differential excitation map. The double variable curvature filter unit is use...

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Abstract

The invention discloses a protection method and a protection device for finger vein characteristic cancelable template, and the method comprises the following steps: carrying out the mapping of each neighborhood difference in a finger vein image, and obtaining a difference excitation diagram; judging the direction of the finger vein, calculating the curvature, and obtaining a geometric feature map; combining the differential excitation graph with the geometric feature graph to obtain a two-dimensional feature graph and feature matrixes in two directions; performing dimension reduction on the feature matrix to obtain a feature vector; generating a random number vector, and obtaining a random matrix; combining the feature vectors into a feature matrix, and performing inner product operationon the feature vectors and a random matrix to obtain a cancellable template; projecting the cancellable template to the same subspace, establishing an objective function, and generating a finger veincancellable template; matching the finger vein characteristic cancelable template, calculating the similarity between the test sample and the training sample, and classifying the test sample. According to the invention, the identification performance and revocation / reusability are improved, and the irreversibility, diversity and security are improved.

Description

technical field [0001] The present invention relates to a protection method in the technical field of biological feature identification, in particular to a protection method for a finger vein cancelable feature template, and also to a protection device for a finger vein cancelable feature template of the protection method. Background technique [0002] At present, biometric identification is widely used in various fields, and the accompanying identity information security issues are becoming more and more prominent, making the protection of biometric information one of the main research directions of current information security. Biological characteristics are unique and stable, that is, the biological characteristics of each person are different and will not change for a long time. Uniqueness makes it widely used in user identification; stability makes it impossible to regenerate new biometric features once the user's feature information is released, even if the user's feat...

Claims

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Application Information

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IPC IPC(8): G06K9/00G06K9/62
CPCG06V40/45G06V40/14G06V10/751G06F18/24G06F18/25
Inventor 王华彬张啸晨施余峰胡栩彬申燕徐莹莹杨硕陶亮
Owner ANHUI UNIVERSITY
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