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Fingerprint identification method, device, equipment and storage medium

A fingerprint identification and fingerprint image technology, applied in the fields of equipment and storage media, devices, and fingerprint identification methods, can solve problems such as hidden dangers and no influence of fingerprint identification technology, and achieve the goal of ensuring the fingerprint identification process, ensuring normality, and improving security. Effect

Active Publication Date: 2019-02-05
SHENZHEN GOODIX TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] For example, when there are scratches, cracks, malicious or unintentional sticking of imageable substances on the surface of the fingerprint sensor of the terminal device, although it can be detected by the naked eye, it generally does not affect fingerprint unlocking or fingerprint payment, so users tend to ignore the above abnormalities. continue to use terminal
As the number of users increases, the fingerprint identification system of the terminal device will generate more and more templates mixed with residual lines, so that the illegal fingerprints mixed with residual lines can be matched with the templates mixed with residual lines, thereby realizing illegal fingerprints. Unlocking terminal equipment or completing fingerprint payment, etc. Therefore, there are certain security risks in the existing fingerprint recognition technology

Method used

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  • Fingerprint identification method, device, equipment and storage medium
  • Fingerprint identification method, device, equipment and storage medium

Examples

Experimental program
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Embodiment 1

[0040] figure 1 It is a flow chart of a fingerprint recognition method provided by an embodiment of the present invention, and the execution body of the method is part or all of the terminal device, such as the terminal device or a processor in the terminal device. The fingerprint identification method will be described below by taking the execution subject of the method as a terminal device as an example. Optionally, the terminal device may be a terminal with a fingerprint identification function such as a mobile phone, a PAD, or a notebook computer, which is not limited in this embodiment of the present invention. Such as figure 1 As shown, the fingerprint identification method includes the following processes:

[0041] Step S11: The terminal device acquires N frames of fingerprint images, where N is an integer greater than 1.

[0042] Step S12: The terminal device judges whether there is a fixed residual area in the N frames of fingerprint images.

[0043] Step S13: If ...

Embodiment 2

[0052] The above step S12 is described as follows:

[0053] A possible implementation method: the terminal device determines the pixels with the same pixel value in the corresponding position in the N frames of fingerprint images. The so-called corresponding position means that the N frames of fingerprint images are placed in the same coordinate system, and the four corner pixels of the N frames of images are aligned. , the so-called four corner pixels include: upper left pixel, lower left pixel, upper right pixel and lower right pixel. Based on this, a certain pixel point in each frame of fingerprint images has a corresponding pixel point in other N−1 frames of fingerprint images, for example: the center points in N frames of fingerprint images are all corresponding to each other. After the terminal device determines the pixels with the same corresponding pixel values ​​in the N frames of fingerprint images, the terminal device determines at least one connected region formed ...

Embodiment 3

[0081] On the basis of embodiment one or embodiment two, Figure 5 The flow chart of the fingerprint recognition method provided for another embodiment of the present invention, such as Figure 5 As shown, above-mentioned step S13 comprises:

[0082] Step S131a: If there is a fixed residual area in the N frames of fingerprint images, the terminal device acquires the geometric transformation vector information corresponding to the last frame of fingerprint images.

[0083] Step S132a: The terminal device uses the second binarized image as a residual texture template and a residual texture sample.

[0084] Step S133a: The terminal device adjusts the relative positions of the residual texture template and the residual texture sample according to the geometric transformation vector information.

[0085] Step S134a: The terminal device calculates the similarity between the residual texture template and the residual texture sample after the relative position adjustment, and takes ...

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Abstract

The embodiment of the invention provides a fingerprint identification method, device, equipment and storage medium. The method comprises: acquiring an N-frame fingerprint image, where N is an integergreater than 1; determining whether the N-frame fingerprint image has a fixed residual region; if the N-frame fingerprint image has the fixed residual region, determining at least one influence factorof the fixed residual region on the fingerprint recognition process caused by the last frame fingerprint image in the N-frame fingerprint image; if at least one influence factor is greater than the corresponding preset threshold, determining that the last frame fingerprint image cannot trigger normal fingerprint recognition results. Therefore, the security of the fingerprint identification process is improved.

Description

technical field [0001] The invention relates to the technical field of fingerprint identification, in particular to a fingerprint identification method, device, equipment and storage medium. Background technique [0002] In recent years, fingerprint identification technology has developed rapidly in the field of terminal equipment, and a large number of terminal equipment have functions such as fingerprint unlocking and fingerprint payment. With the increasing frequency of fingerprint unlocking and fingerprint payment, security issues are becoming more and more prominent. [0003] For example, when there are scratches, cracks, malicious or unintentional sticking of imageable substances on the surface of the fingerprint sensor of the terminal device, although it can be detected by the naked eye, it generally does not affect fingerprint unlocking or fingerprint payment, so users tend to ignore the above abnormalities. Continue to use the terminal device. As the number of use...

Claims

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Application Information

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IPC IPC(8): G06K9/00
CPCG06V40/1347
Inventor 冉耕王信亮李洪生李丹
Owner SHENZHEN GOODIX TECH CO LTD