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Method, device and mobile terminal for acquiring calibration parameters of a fingerprint sensor

A fingerprint sensor and calibration parameter technology, which is applied in the field of calibration parameter acquisition methods, devices and mobile terminals, can solve the problems of low fingerprint image accuracy and lower fingerprint recognition rate, and achieve the effect of improving accuracy

Active Publication Date: 2017-11-21
GUANGDONG OPPO MOBILE TELECOMM CORP LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, regardless of whether there is liquid on the surface of the fingerprint sensor, after the user touches the fingerprint sensor, the same calibration parameter value is obtained to capture the fingerprint image, resulting in a low accuracy rate of the captured fingerprint image, which in turn leads to the above-mentioned The fingerprint image does not match the pre-stored fingerprint image, which reduces the recognition rate of the fingerprint

Method used

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  • Method, device and mobile terminal for acquiring calibration parameters of a fingerprint sensor
  • Method, device and mobile terminal for acquiring calibration parameters of a fingerprint sensor
  • Method, device and mobile terminal for acquiring calibration parameters of a fingerprint sensor

Examples

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Embodiment 1

[0019] figure 1 A flow chart of a method for acquiring calibration parameters of a fingerprint sensor provided in Embodiment 1 of the present invention is given, and the method can be executed by an apparatus for acquiring calibration parameters of a fingerprint sensor. The device can be realized by software and / or hardware, and can be built in the mobile terminal as a part of the mobile terminal. like figure 1 As shown, the method for obtaining the calibration parameters of the fingerprint sensor provided in this embodiment specifically includes the following steps:

[0020] Step 101. When a calibration parameter acquisition trigger event is detected, determine whether there is liquid on the surface of the fingerprint sensor based on a preset determination method.

[0021] The mobile terminals described in this embodiment include but are not limited to mobile phones, tablet computers, and notebooks.

[0022] Wherein, the calibration parameter acquisition trigger event can ...

Embodiment 2

[0029] figure 2 A flow chart of the method for acquiring the calibration parameters of the fingerprint sensor provided by Embodiment 2 of the present invention is given. The present invention is optimized on the basis of Embodiment 1. In this embodiment, the corresponding preset calibration parameter value will be determined according to the judgment result to support the capture of the fingerprint image according to the preset calibration parameter value. The specific optimization is as follows: When there is no liquid on the surface of the fingerprint sensor, determine that the corresponding preset calibration parameter value is the first preset calibration parameter value, so as to support the capture of the fingerprint image according to the first preset calibration parameter value; When there is liquid on the surface of the sensor, it is determined that the corresponding preset calibration parameter value is a second preset calibration parameter value, so as to support t...

Embodiment 3

[0038] image 3 A flow chart of the method for acquiring the calibration parameters of the fingerprint sensor provided by Embodiment 3 of the present invention is given. This embodiment is optimized on the basis of Embodiment 1. In this embodiment, the corresponding preset calibration parameter value will be determined according to the judgment result, so as to support the capture of the fingerprint image according to the preset calibration parameter value. The specific optimization is as follows : When there is no liquid on the surface of the fingerprint sensor, determine that the corresponding preset calibration parameter value is the first preset calibration parameter value, so as to support the capture of the fingerprint image according to the first preset calibration parameter value; in the When there is liquid on the surface of the fingerprint sensor, control the heating of the fingerprint sensor to remove the liquid on the surface of the fingerprint sensor, and determin...

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Abstract

The invention discloses a method, device and mobile terminal for acquiring calibration parameters of a fingerprint sensor. The method includes: when a calibration parameter acquisition trigger event is detected, determining whether there is liquid on the surface of the fingerprint sensor based on a preset determination method; As a result, the corresponding preset calibration parameter value is determined to support the capture of the fingerprint image according to the preset calibration parameter value. The technical solution provided by the embodiment of the present invention solves the problem of the fingerprint sensor in the prior art by determining whether there is liquid on the surface of the fingerprint sensor and determining the preset calibration parameter value corresponding to the fingerprint sensor according to the determination result to capture the fingerprint image. Whether there is liquid on the surface, the same calibration parameter value is obtained for capturing the fingerprint image, which leads to the technical problem of low accuracy of the calibration parameter of the captured fingerprint image, which improves the accuracy of obtaining the calibration parameter of the fingerprint sensor, and Accuracy of captured fingerprint images.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of mobile terminals, in particular to a method and device for acquiring calibration parameters of a fingerprint sensor, and a mobile terminal. Background technique [0002] With the development of mobile terminal technology and image processing technology, fingerprint recognition technology has been applied to many fields as a highly secure recognition technology, which not only brings security protection to personal private devices, but also brings convenience to users. sex. For example, the mobile terminal or the application software or files on the mobile terminal are encrypted or unlocked through the fingerprint identification technology, which brings good experience to the user. [0003] Generally speaking, the fingerprint identification process of the fingerprint sensor of the mobile terminal mainly includes the following three steps: 1. Calibrate the fingerprint sensor and obtai...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06K9/00G06V40/13
CPCG06V40/13
Inventor 张强王立中周海涛蒋奎贺威
Owner GUANGDONG OPPO MOBILE TELECOMM CORP LTD