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Pressure fingerprint identification method, device and terminal equipment

A technology for fingerprint identification and terminal equipment, applied in the field of image processing, which can solve the problems of difficult identification and deformation of fingerprint images, and achieve the effects of improving user experience, reducing calibration time, and increasing acquisition speed

Inactive Publication Date: 2019-08-23
GUANGDONG OPPO MOBILE TELECOMM CORP LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, for the currently commonly used pressure fingerprints, since the fingerprints will be deformed when they are squeezed, the collected fingerprint images are not easy to identify.

Method used

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  • Pressure fingerprint identification method, device and terminal equipment
  • Pressure fingerprint identification method, device and terminal equipment
  • Pressure fingerprint identification method, device and terminal equipment

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0034] It is determined that the current capacitance value of the fingerprint identification module is different from the preset capacitance value.

[0035] Specifically, when the user touches the fingerprint identification module, the capacitance value of the fingerprint identification module will change. Therefore, it can be determined whether the user has touched the fingerprint identification module by judging whether the capacitance value of the fingerprint identification module is the same as the preset capacitance value. Fingerprint identification module. Wherein, the preset capacitance value refers to the capacitance value of the fingerprint recognition module in a normal state.

example 2

[0037] It is determined that the image currently collected by the fingerprint recognition module is different from the image collected before the preset time interval.

[0038] Wherein, the preset time interval can be set as required, such as 10 seconds (s), 30s, 40s, and so on.

[0039] Specifically, before the user's finger touches the fingerprint recognition module, the fingerprint recognition module can repeatedly perform image collection according to the preset time interval, and compare the image collected at the current moment with the image collected before the preset time interval. If the two are the same, it is considered that there is no fingerprint touching the fingerprint identification module; if not, it can be considered that there is a fingerprint touching the fingerprint identification module, so that the current touch pressure value can be detected.

[0040] S102. Acquire a first calibration parameter corresponding to the first pressure value according to a p...

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Abstract

The present invention proposes a fingerprint recognition method, device and terminal equipment. The fingerprint recognition method includes determining the first pressure value of the current fingerprint recognition module when it is detected that the user's finger touches the fingerprint recognition module; A calibration strategy is set to obtain a first calibration parameter corresponding to the first pressure value; according to the first calibration parameter, a first image of the finger pressing the fingerprint recognition module is collected. The pressing fingerprint identification method, device and terminal equipment provided by the present application adjust the calibration parameters to collect fingerprint images according to the pressure value received by the fingerprint identification module, which reduces the calibration time of the fingerprint identification module and improves the accuracy of the fingerprint image. Acquisition speed, thereby improving the accuracy of pressure fingerprint recognition and improving user experience.

Description

technical field [0001] The present invention relates to the technical field of image processing, in particular to a pressure fingerprint recognition method, device and terminal equipment. Background technique [0002] It is very common to install a fingerprint identification module on a mobile terminal at present. Fingerprint recognition can not only be used for unlocking, wake-up and other functions, but also an important part of mobile payment. [0003] Usually, the fingerprint identification process mainly includes the following three steps: calibrate the fingerprint identification module and determine the calibration parameters; collect fingerprint images according to the calibration parameters, and then compare the collected fingerprint images with the stored fingerprint images to obtain identification result. [0004] However, for the currently commonly used pressure fingerprints, since the fingerprints are deformed when being squeezed, the collected fingerprint imag...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06K9/00
CPCG06V40/13
Inventor 张海平周意保
Owner GUANGDONG OPPO MOBILE TELECOMM CORP LTD