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Biological characteristic multi-modal fusion identification method and device, storage medium and equipment

A technology of biometrics and fusion recognition, which is applied in the field of biometrics, can solve the problems of the adjustment of the comparison threshold, the uncertainty of the comparison score fusion, and the inability to play different modes, so as to achieve good recognition accuracy and improve safety and reliability. Effect

Pending Publication Date: 2022-05-24
BEIJING TECHSHINO TECH +1
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0007] In order to solve the technical problems that the adjustment of the contrast threshold in the multimodal biometric recognition of the prior art has uncertainty and the advantages of different modalities cannot be brought into play by the fusion of comparison scores, the present invention provides a biometric multimodal fusion recognition The method, device, storage medium and equipment dynamically adjust the comparison threshold according to the quality score of the biometric image, and use the quality score of the biometric image to assist decision-making on the recognition result, and at the same time combine the comparison score fusion to gradually increase the identity Probability of authentication, increasing security and reliability of biometric identification

Method used

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  • Biological characteristic multi-modal fusion identification method and device, storage medium and equipment
  • Biological characteristic multi-modal fusion identification method and device, storage medium and equipment
  • Biological characteristic multi-modal fusion identification method and device, storage medium and equipment

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Embodiment 1

[0038] The embodiment of the present invention provides a biometric multimodal fusion identification method, such as figure 1 As shown, the method includes:

[0039] S100: Identify the biometric images of the first modality and the second modality in sequence.

[0040] In this step, the biometric image of the first modality and the biometric image of the second modality of the user to be identified are acquired, and the biometric image of the first modality and the biometric feature of the second modality are respectively analyzed in chronological order. The image is identified, wherein the biometric image of the first modality may be a face image, and the biometric image of the second modality may be an iris image.

[0041] S110: When the first modality is recognized, adjust the comparison threshold of the second modality according to the quality score of the biometric image of the second modality.

[0042]In this step, the biometric feature of the biometric image of the fi...

Embodiment 2

[0138] An embodiment of the present invention provides a biometric multimodal fusion identification device, the device comprising:

[0139] The recognition module 100 is used for sequentially recognizing the biometric images of each modality.

[0140] The comparison threshold adjustment module 110 is configured to adjust the comparison threshold of the second modality according to the quality score of the biometric image of the second modality when the first modality is recognized.

[0141] The first judgment module 120 is used for when the comparison score of the second modality is not less than the lowest threshold of the second modality and the adjusted comparison threshold of the second modality, and the quality of the biometric image of the second modality is When the score is not less than the decision threshold of the second modality, it is judged that the recognition is passed.

[0142] The second judging module 130 is used for when the comparison score of the second ...

Embodiment 3

[0157] The method described in Embodiment 1 provided in this specification can implement business logic through a computer program and record it on a storage medium, and the storage medium can be read and executed by a computer to achieve the effects of the solution described in Embodiment 1 of this specification. Therefore, the present invention also provides a computer-readable storage medium for biometric multimodal fusion recognition, including a memory for storing processor-executable instructions, and when the instructions are executed by the processor, the biometric multimodality including Embodiment 1 is implemented The steps of the state fusion recognition method.

[0158] The invention firstly adjusts the comparison threshold dynamically according to the quality score of the biometric image, and also uses the quality score of the biometric image to make an auxiliary decision on the recognition result, and at the same time combines the comparison score fusion, graduall...

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Abstract

The invention discloses a biological feature multi-modal fusion recognition method and device, a storage medium and equipment. Adjusting a comparison threshold value of the second mode according to the quality score of the image of the second mode in multi-mode identification; when the comparison score of the second mode is not smaller than the adjusted comparison threshold value of the second mode and the quality score of the biological feature image of the second mode is not smaller than the decision threshold value of the second mode, judging that identification is passed; otherwise, fusing the comparison scores of the two modalities to obtain a fusion score, when the fusion score is greater than a fusion score threshold value, passing recognition, during score fusion, normalizing the comparison scores of the two modalities to form a score pair, performing polynomial kernel mapping on the score pair to obtain high-dimensional data, and inputting the high-dimensional data into the trained logistic regression model to obtain high-dimensional data. And obtaining a fused comparison score. According to the invention, the safety and reliability of biological identity recognition can be improved.

Description

technical field [0001] The present invention relates to the field of biometric identification, in particular to a biometric multimodal fusion identification method, device, storage medium and equipment. Background technique [0002] Biometric technology is closely combined with high-tech means such as optics, acoustics, biosensors and biostatistics principles, and uses the inherent physiological characteristics of the human body such as fingerprints, faces, iris, finger veins, etc. to identify personal identity. [0003] With the increasing requirements for social security and the accuracy and reliability of identity authentication, the limitations of single biometric identification in terms of accuracy and reliability have become increasingly prominent, which are far from meeting the needs of product and technology development. Currently, multimodal biometric identification is considered to be a research direction with the most potential and advantages. Multimodal biometri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06V10/44G06K9/62
CPCG06F18/253
Inventor 郭秀花杨春林丁松江武明王洋孙飞周军
Owner BEIJING TECHSHINO TECH
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