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A detection algorithm for foreign objects on the mirror surface of finger vein equipment

A detection algorithm, finger vein technology, applied in computing, subcutaneous biometrics, computer components, etc., can solve problems such as foreign objects in finger vein equipment, increase in false recognition rate, etc., to eliminate fixed noise, reduce false recognition rate, reduce Effects of Security Risks

Active Publication Date: 2022-04-15
TOP GLORY TECH INC CO LTD
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  • Summary
  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem that foreign matter appears on the mirror surface of the finger vein device and cause the false recognition rate to increase, the present invention provides a detection algorithm for foreign matter on the mirror surface of the finger vein device

Method used

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  • A detection algorithm for foreign objects on the mirror surface of finger vein equipment
  • A detection algorithm for foreign objects on the mirror surface of finger vein equipment
  • A detection algorithm for foreign objects on the mirror surface of finger vein equipment

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Embodiment Construction

[0036] A detection algorithm for foreign matter on the mirror surface of a finger vein device, the algorithm is implemented by the following steps:

[0037] Step S1: using the finger vein device to collect M finger vein images of the user;

[0038] Step S2: Perform normalization processing on each of the collected finger vein images;

[0039] Step S3: performing multi-scale Gaussian filtering on each finger vein image after normalization processing;

[0040] Step S4: For each finger vein image after Gaussian filtering, subtract the Gaussian filtering results of adjacent scales to obtain N noise images corresponding to each finger vein image, and the noise size contained in the N noise images vary;

[0041] Step S5: Perform multi-directional filtering on each noise image, thereby obtaining a binary image in which finger vein information is filtered and noise is retained;

[0042] Step S6: sort the N binary images corresponding to each finger vein image in ascending order of ...

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Abstract

The invention relates to biological feature identification and information security technology, in particular to a detection algorithm for foreign objects on the mirror surface of finger vein equipment. The invention solves the problem that the false recognition rate is increased due to foreign matter appearing on the mirror surface of the finger vein device. A detection algorithm for foreign matter on the mirror surface of a finger vein device, the algorithm is realized by the following steps: step S1: collect finger vein images; step S2: normalize processing; step S3: Gaussian filtering; step S4: obtain noise images; S5: Obtain the binary image; Step S6: Determine the noise level; Step S7: Set the noise threshold; Step S8: Compare the noise level of the first binary image with the noise threshold; Step S9: Determine the binary value obtained by superposition The noise level of the image; step S10: compare the noise level of the next binary image with the noise threshold; step S11: determine the noise level of the superimposed binary image; step S12: loop through steps S10 to S11. The invention is suitable for the security field.

Description

technical field [0001] The invention relates to biological feature identification and information security technology, in particular to a detection algorithm for foreign objects on the mirror surface of finger vein equipment. Background technique [0002] Finger vein recognition technology is an emerging biometric identification technology, which uses finger vein equipment to collect images of vein distribution in fingers for identity authentication. During the use of the finger vein device, due to the long-term uncleanness of the user or the deliberate attack of criminals, foreign objects often appear on the mirror surface of the finger vein device. As a result, the finger vein images collected by the finger vein device contain fixed noise, resulting in The false recognition rate of finger vein devices increases, which in turn leads to an increase in the security risk of identity authentication. Based on this, it is necessary to invent a detection algorithm for foreign mat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06V40/12G06V40/10G06V10/30G06V40/14
CPCG06V40/1365G06V40/10G06V40/14G06V10/30
Inventor 张烜赵国栋杨爽李学双
Owner TOP GLORY TECH INC CO LTD