WO2017067259A1 - Method and apparatus for acquiring fingerprint sensor calibration parameters, and mobile terminal - Google Patents

Method and apparatus for acquiring fingerprint sensor calibration parameters, and mobile terminal Download PDF

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Publication number
WO2017067259A1
WO2017067259A1 PCT/CN2016/091803 CN2016091803W WO2017067259A1 WO 2017067259 A1 WO2017067259 A1 WO 2017067259A1 CN 2016091803 W CN2016091803 W CN 2016091803W WO 2017067259 A1 WO2017067259 A1 WO 2017067259A1
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WIPO (PCT)
Prior art keywords
calibration parameter
parameter value
preset
fingerprint sensor
liquid
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PCT/CN2016/091803
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French (fr)
Chinese (zh)
Inventor
张强
王立中
周海涛
蒋奎
贺威
Original Assignee
广东欧珀移动通信有限公司
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Application filed by 广东欧珀移动通信有限公司 filed Critical 广东欧珀移动通信有限公司
Publication of WO2017067259A1 publication Critical patent/WO2017067259A1/en

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
    • G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
    • G06V40/12—Fingerprints or palmprints
    • G06V40/13—Sensors therefor

Definitions

  • the embodiments of the present invention relate to the field of mobile terminal technologies, and in particular, to a method, an apparatus, and a mobile terminal for acquiring calibration parameters of a fingerprint sensor.
  • fingerprint recognition technology has been applied to many fields as a highly secure identification technology, which not only brings security protection to personal privacy devices, but also brings convenience to users.
  • the fingerprinting technology is used to encrypt or unlock the application software or files on the terminal or the terminal, which brings a good experience to the user.
  • the fingerprint recognition process of the fingerprint sensor of the mobile terminal mainly includes the following three steps: 1. calibrating the fingerprint sensor and obtaining calibration parameters; 2. performing fingerprint image capture according to the calibration parameter; 3. grasping the captured image
  • the fingerprint image is matched with a pre-stored fingerprint image. Because, when the fingerprint image of the user is captured by the fingerprint sensor, the user needs to touch the surface of the fingerprint sensor of the mobile terminal through the finger to capture the fingerprint information of the user. Inevitably, there is a liquid on the surface of the fingerprint sensor.
  • the same calibration parameter value is acquired to capture the fingerprint image, resulting in low accuracy of the captured fingerprint image, thereby causing the The fingerprint image does not match the pre-stored fingerprint image, which reduces the recognition rate of the fingerprint.
  • Embodiments of the present invention provide a method, a device, and a mobile terminal for acquiring calibration parameters of a fingerprint sensor, so as to improve the accuracy of obtaining calibration parameters of the fingerprint sensor.
  • an embodiment of the present invention provides a method for acquiring a calibration parameter of a fingerprint sensor, including:
  • Corresponding preset calibration parameter values are determined according to the determination result to support the capture of the fingerprint image according to the preset calibration parameter values.
  • an embodiment of the present invention provides a device for acquiring calibration parameters of a fingerprint sensor, including:
  • a determining module configured to determine, according to a preset determination method, whether there is liquid on the surface of the fingerprint sensor when the calibration parameter acquisition trigger event is detected;
  • the calibration parameter value determining module is configured to determine a corresponding preset calibration parameter value according to the determination result, to support the capturing of the fingerprint image according to the preset calibration parameter value.
  • an embodiment of the present invention further provides a mobile terminal, including a fingerprint sensor, and a device for acquiring calibration parameters of a fingerprint sensor connected to the fingerprint sensor, where the calibration parameter acquisition device includes:
  • a determining module configured to determine, according to a preset determination method, whether there is liquid on the surface of the fingerprint sensor when the calibration parameter acquisition trigger event is detected;
  • the calibration parameter value determining module is configured to determine a corresponding preset calibration parameter value according to the determination result, to support the capturing of the fingerprint image according to the preset calibration parameter value.
  • the method, device and mobile terminal for acquiring the calibration parameters of the fingerprint sensor determine the preset calibration parameter value corresponding to the fingerprint sensor according to the determination result by determining whether there is liquid on the surface of the fingerprint sensor to perform fingerprint image capture
  • the method solves the technical problem that the same calibration parameter value is acquired for the fingerprint image capture in the prior art regardless of whether there is liquid on the surface of the fingerprint sensor, which leads to a technical problem that the acquired calibration parameter of the captured fingerprint image has low accuracy, and the technical problem is improved. Obtain the accuracy of the calibration parameters of the fingerprint sensor and the accuracy of the captured fingerprint image.
  • FIG. 1 is a flowchart of a method for acquiring calibration parameters of a fingerprint sensor according to Embodiment 1 of the present invention
  • FIG. 2 is a flowchart of a method for acquiring calibration parameters of a fingerprint sensor according to Embodiment 2 of the present invention
  • FIG. 3 is a flowchart of a method for acquiring calibration parameters of a fingerprint sensor according to Embodiment 3 of the present invention
  • FIG. 4 is a schematic structural diagram of an apparatus for acquiring calibration parameters of a fingerprint sensor according to Embodiment 4 of the present invention.
  • FIG. 5 is a schematic structural diagram of a mobile terminal according to Embodiment 5 of the present invention.
  • FIG. 1 is a flowchart of a method for acquiring calibration parameters of a fingerprint sensor according to Embodiment 1 of the present invention, which may be performed by a calibration parameter acquisition device of a fingerprint sensor.
  • the apparatus may be implemented by software and/or hardware and may be built into the mobile terminal as part of the mobile terminal.
  • the method for acquiring calibration parameters of the fingerprint sensor provided in this embodiment specifically includes the following steps:
  • Step 101 When detecting a calibration parameter acquisition trigger event, determine whether there is liquid on the surface of the fingerprint sensor based on the preset determination method.
  • the mobile terminal described in this embodiment includes, but is not limited to, a mobile phone, a tablet computer, and a notebook.
  • the calibration parameter acquisition trigger event may be any event that detects some preset instruction before detecting that the user acts on the fingerprint sensor, for example, when the mobile terminal runs the application software, such as WeChat payment, Before the fingerprint sensor, as long as the WeChat payment related instruction is detected, a calibration parameter acquisition trigger event is generated, and the calibration parameter is acquired before the user acts on the sensor.
  • liquid may be water.
  • Step 102 Determine a corresponding preset calibration parameter value according to the determination result, to support the capture of the fingerprint image according to the preset calibration parameter value.
  • the determining the corresponding preset parameter according to the determination result may be: when there is no liquid on the surface of the fingerprint sensor, determining that the corresponding preset calibration parameter value is a first preset calibration parameter value; when the fingerprint sensor surface has a liquid And determining that the corresponding preset calibration parameter value is the second preset calibration parameter value.
  • the method may also be: first, according to the determination result, obtaining the humidity of the surface of the fingerprint sensor from the determination result, and acquiring a corresponding preset calibration parameter value according to the humidity of the fingerprint sensor.
  • the humidity may be divided into multiple levels, and each humidity level corresponds to a preset calibration parameter value.
  • the humidity level of the surface of the fingerprint sensor is acquired; and the preset calibration parameter value corresponding to the humidity level is obtained; finally, the preset calibration parameter value is set to the second preset.
  • the parameter values are calibrated to support the capture of the fingerprint image based on the second preset calibration parameter value.
  • the preset calibration parameter value is a calibration parameter value preset and stored in the system, and the benefit of the setting is that the fingerprint sensor calibration caused by the automatic calibration and generating the calibration parameter before the fingerprint image is captured in the prior art can be solved. A long time problem.
  • the calibration parameter value is determined, if an operation instruction of the user acting on the fingerprint sensor is detected, the fingerprint image is captured according to the preset calibration parameter value.
  • the method for acquiring calibration parameters of the fingerprint sensor solves the technical means for determining the preset calibration parameter value corresponding to the fingerprint sensor according to the determination result by determining whether there is liquid on the surface of the fingerprint sensor, and solving the fingerprint image.
  • the same calibration parameter value is acquired for fingerprint image capture, resulting in a technical problem that the acquired calibration parameter of the captured fingerprint image has low accuracy, and the acquisition of the fingerprint sensor is improved.
  • the accuracy of the calibration parameters and the accuracy of the captured fingerprint image is improved.
  • FIG. 2 is a flow chart showing a method for acquiring calibration parameters of a fingerprint sensor according to Embodiment 2 of the present invention.
  • the present invention is optimized based on the first embodiment.
  • the corresponding preset calibration parameter value is determined according to the determination result, so as to support the capture of the fingerprint image according to the preset calibration parameter value, and the optimization is: When there is no liquid on the surface of the fingerprint sensor, determining that the corresponding preset calibration parameter value is a first preset calibration parameter value, to support capturing 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 to support the capture of the fingerprint image according to the second preset calibration parameter value.
  • the method for acquiring calibration parameters of the fingerprint sensor includes the following steps:
  • Step 201 When detecting the calibration parameter acquisition trigger event, determine whether there is liquid on the surface of the fingerprint sensor based on the preset determination method.
  • Step 202 When there is no liquid on the surface of the fingerprint sensor, determine that the corresponding preset calibration parameter value is a first preset calibration parameter value, to support the capture of the fingerprint image according to the first preset calibration parameter value.
  • the first preset calibration parameter value includes a first preset gain value and a first preset offset value.
  • the input signal of the fingerprint image is x
  • the fingerprint image data captured according to the calibration parameter is y
  • the first preset gain value k is used to perform a large-scale adjustment on the input signal of the fingerprint image
  • the first preset offset value b is used to fine-tune the input signal of the fingerprint image.
  • Step 203 When there is liquid on the surface of the fingerprint sensor, determine that the corresponding preset calibration parameter value is a second preset calibration parameter value, to support the capture of the fingerprint image according to the second preset calibration parameter value.
  • the second preset calibration parameter value includes a second preset gain value and a second preset offset value, where the first preset gain value is smaller than the second preset gain value. Because, when there is no liquid on the surface of the fingerprint sensor, the capacitance of the fingerprint sensor changes when the user's finger acts on the fingerprint sensor, and the corresponding gain value for capturing the fingerprint image is small. When there is liquid on the surface of the fingerprint sensor, the fingerprint sensor The change in capacitance is small, and the corresponding gain value for capturing the fingerprint image is large.
  • the determination result of whether there is liquid on the surface of the fingerprint sensor is divided into two cases: a liquid and no liquid, each of which corresponds to a preset calibration parameter value, a preset calibration parameter value corresponding to the liquid, and no liquid.
  • the corresponding preset calibration parameter values may be significantly different; when there is liquid on the surface of the fingerprint sensor, the difference between the preset calibration parameter values and the humidity level is not obvious.
  • different preset calibration parameter values are set for different humidity levels when there is liquid, the accuracy of the calibration parameter acquisition can be improved, but the corresponding preset calibration parameter values are determined according to the liquid crystal and no liquid determination results on the surface of the fingerprint sensor.
  • the time to determine the calibration parameters can be shortened on the basis of ensuring the accuracy of the calibration parameters.
  • the method for obtaining calibration parameters of the fingerprint sensor determines whether the corresponding preset calibration parameter value is the first preset calibration parameter when determining whether there is liquid on the surface of the fingerprint sensor and there is no liquid on the surface of the fingerprint sensor. a value, when the fingerprint sensor surface has a liquid, determining that the corresponding preset calibration parameter value is a second preset calibration parameter value, to support performing according to the first preset calibration parameter value or the second preset calibration parameter value.
  • the capture of the fingerprint image solves the prior art technique of acquiring the same calibration parameter value to capture the fingerprint image regardless of whether there is liquid on the surface of the fingerprint sensor, resulting in a low accuracy of the calibration parameters of the captured fingerprint image.
  • the problem is to improve the accuracy of obtaining the calibration parameters of the fingerprint sensor, and the accuracy of the captured fingerprint image, and shorten the time for determining the calibration parameters, and speed up the capture of the fingerprint image according to the calibration parameters.
  • FIG. 3 is a flow chart showing a method for acquiring calibration parameters of a fingerprint sensor according to Embodiment 3 of the present invention.
  • the embodiment is optimized based on the first embodiment.
  • the corresponding preset calibration parameter value is determined according to the determination result, so as to support the capture of the fingerprint image according to the preset calibration parameter value.
  • the corresponding preset calibration parameter value is determined to be a first preset calibration parameter value to support calibration according to the first preset.
  • the parameter value is used to capture the fingerprint image.
  • the method for acquiring calibration parameters of the fingerprint sensor includes the following steps:
  • Step 301 When detecting a calibration parameter acquisition trigger event, determine whether there is liquid on the surface of the fingerprint sensor based on the preset determination method.
  • the step may include: acquiring a current capacitance value of the fingerprint sensor when detecting the calibration parameter acquisition trigger event; calculating a difference between the current capacitance value and the preset capacitance reference value; if the difference is within a preset threshold Then, it is determined that there is liquid on the surface of the fingerprint sensor, otherwise it is determined that there is no liquid on the surface of the fingerprint sensor.
  • the preset capacitance reference value is a capacitance value measured when the fingerprint sensor has no liquid on the surface thereof before leaving the factory, and the preset capacitance reference value is pre-stored in the system.
  • Step 302 When there is no liquid on the surface of the fingerprint sensor, determine that the corresponding preset calibration parameter value is a first preset calibration parameter value, to support the capture of the fingerprint image according to the first preset calibration parameter value.
  • Step 303 When there is liquid on the surface of the fingerprint sensor, control the temperature of the fingerprint sensor to remove the liquid on the surface of the fingerprint sensor, and determine that the corresponding preset calibration parameter value is the first preset calibration parameter value, to support the The first preset calibration parameter value is used to capture the fingerprint image.
  • the controlling the temperature of the fingerprint sensor may include: increasing the power of the fingerprint sensor to increase the temperature of the fingerprint sensor; or controlling a heating device corresponding to the fingerprint sensor to heat the fingerprint sensor, so that the The fingerprint sensor heats up.
  • the increasing the power of the fingerprint sensor may increase the power at the same increasing rate, or increasing the power at an increasing rate of a step change; the controlling the heating device corresponding to the fingerprint sensor
  • the fingerprint sensor may be heated to heat the fingerprint sensor at the same heating rate, or the fingerprint sensor may be heated at a stepwise heating rate, which is not limited in this embodiment.
  • prompt information of liquid on the surface of the fingerprint sensor may also be issued to prompt the user to remove the liquid on the surface of the fingerprint sensor.
  • the method for obtaining calibration parameters of the fingerprint sensor determines whether there is liquid on the surface of the fingerprint sensor by the change of the capacitance of the fingerprint sensor. When there is no liquid on the surface of the fingerprint sensor, the corresponding preset calibration parameter value is determined. a preset calibration parameter value, when there is liquid on the surface of the fingerprint sensor, controlling the temperature of the fingerprint sensor to remove the liquid on the surface of the fingerprint sensor, and determining that the corresponding preset calibration parameter value is the first preset calibration parameter value, In order to support the capture of the fingerprint image according to the first preset calibration parameter value, the prior art obtains the same calibration parameter value to capture the fingerprint image regardless of whether the fingerprint sensor surface has liquid, thereby causing the fingerprint image to be captured. The obtained technical problem of low accuracy of the calibration parameters of the captured fingerprint image improves the accuracy of obtaining the calibration parameters of the fingerprint sensor and the accuracy of the captured fingerprint image.
  • FIG. 4 is a schematic structural diagram of an apparatus for acquiring calibration parameters of a fingerprint sensor according to Embodiment 4 of the present invention. As shown in FIG. 4, the apparatus for acquiring calibration parameters of a fingerprint sensor according to Embodiment 4 of the present invention includes:
  • the determining module 41 is configured to determine, according to a preset determination method, whether there is liquid on the surface of the fingerprint sensor when the calibration parameter acquisition trigger event is detected;
  • the calibration parameter value determining module 42 is configured to determine a corresponding preset calibration parameter value according to the determination result, to support the capturing of the fingerprint image according to the preset calibration parameter value.
  • the calibration parameter value determining module 42 is specifically configured to:
  • the corresponding preset calibration parameter value is a first preset calibration parameter value, to support the capture of the fingerprint image according to the first preset calibration parameter value;
  • the calibration parameter value determining module 42 is specifically configured to:
  • the calibration parameter value determining module 42 includes:
  • a first calibration parameter value determining unit configured to determine, when the fingerprint sensor surface has no liquid, a corresponding preset calibration parameter value as a first preset calibration parameter value, to support performing according to the first preset calibration parameter value Grasping of fingerprint images;
  • a fingerprint sensor temperature increasing unit configured to control temperature rise of the fingerprint sensor to remove liquid on the surface of the fingerprint sensor when there is liquid on the surface of the fingerprint sensor
  • the second calibration parameter value determining unit is configured to determine that the corresponding preset calibration parameter value is the first preset calibration parameter value, to support the capturing of the fingerprint image according to the first preset calibration parameter value.
  • the first preset calibration parameter value includes a first preset gain value and a first preset offset value
  • the second preset calibration parameter value includes a second preset gain value and a second preset And an offset value, where the first preset gain value is smaller than the second preset gain value
  • the determining module 41 is specifically configured to:
  • the difference is within a preset threshold, it is determined that there is liquid on the surface of the fingerprint sensor, otherwise it is determined that there is no liquid on the surface of the fingerprint sensor.
  • the fingerprint sensor heating unit is specifically configured to:
  • the surface of the fingerprint sensor When the surface of the fingerprint sensor has a liquid, increase the power of the fingerprint sensor to heat the fingerprint sensor; or, when there is liquid on the surface of the fingerprint sensor, control a heating device corresponding to the fingerprint sensor.
  • the fingerprint sensor is heated to warm the fingerprint sensor.
  • the acquiring device of the calibration parameter of the fingerprint sensor provided by the embodiment of the present invention may perform the method for acquiring the calibration parameter of the fingerprint sensor provided by any embodiment of the present invention, and has a function module and a beneficial effect corresponding to the execution method.
  • FIG. 5 is a schematic structural diagram of a mobile terminal according to Embodiment 5 of the present invention, wherein the mobile terminal 5 includes a fingerprint sensor 51, and a acquiring parameter 52 of a calibration parameter of the fingerprint sensor connected to the fingerprint sensor 51.
  • the obtaining device 52 of the calibration parameter of the fingerprint sensor includes:
  • the determining module 521 is configured to determine, according to a preset determination method, whether there is liquid on the surface of the fingerprint sensor when the calibration parameter acquisition trigger event is detected;
  • the calibration parameter value determining module 522 is configured to determine a corresponding preset calibration parameter value according to the determination result, to support the capturing of the fingerprint image according to the preset calibration parameter value.
  • the calibration parameter value determining module 522 is specifically configured to:
  • the corresponding preset calibration parameter value is a first preset calibration parameter value, to support the capture of the fingerprint image according to the first preset calibration parameter value;
  • the calibration parameter value determining module 522 is specifically configured to:
  • the calibration parameter value determining module 522 includes:
  • a first calibration parameter value determining unit configured to determine, when the fingerprint sensor surface has no liquid, a corresponding preset calibration parameter value as a first preset calibration parameter value, to support performing according to the first preset calibration parameter value Grasping of fingerprint images;
  • a fingerprint sensor temperature increasing unit configured to control temperature rise of the fingerprint sensor to remove liquid on the surface of the fingerprint sensor when there is liquid on the surface of the fingerprint sensor
  • the second calibration parameter value determining unit is configured to determine that the corresponding preset calibration parameter value is the first preset calibration parameter value, to support the capturing of the fingerprint image according to the first preset calibration parameter value.
  • the first preset calibration parameter value includes a first preset gain value and a first preset offset value
  • the second preset calibration parameter value includes a second preset gain value and a second preset And an offset value, where the first preset gain value is smaller than the second preset gain value
  • the determining module 521 is specifically configured to:
  • the difference is within a preset threshold, it is determined that there is liquid on the surface of the fingerprint sensor, otherwise it is determined that there is no liquid on the surface of the fingerprint sensor.
  • the fingerprint sensor heating unit is specifically configured to:
  • the surface of the fingerprint sensor When the surface of the fingerprint sensor has a liquid, increase the power of the fingerprint sensor to heat the fingerprint sensor; or, when there is liquid on the surface of the fingerprint sensor, control a heating device corresponding to the fingerprint sensor.
  • the fingerprint sensor is heated to warm the fingerprint sensor.
  • the mobile terminal provided by the embodiment of the present invention adopts the acquiring device of the calibration parameter of the fingerprint sensor provided by the present invention, and can execute the method for acquiring the calibration parameter of the fingerprint sensor provided by any embodiment of the present invention, and has the corresponding functional module and the beneficial method of the execution method. effect.
  • ROM read only memory
  • RAM Random Access Memory

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Abstract

Disclosed in the present invention are a method and apparatus for acquiring fingerprint sensor calibration parameters, and a mobile terminal, the method comprising: when detecting a calibration parameter acquisition trigger event, on the basis of a preset determining method, determining whether there is liquid on the surface of a fingerprint sensor; on the basis of the determining results, determining corresponding preset calibration parameter values, in order to support the capture of fingerprint images on the basis of the preset calibration parameter values.

Description

一种指纹传感器的校准参数的获取方法、装置及移动终端 Method, device and mobile terminal for acquiring calibration parameters of fingerprint sensor
本申请要求于2015年10月19日提交中国专利局、申请号为CN201510680017.0、发明名称为“一种指纹传感器的校准参数的获取方法、装置及移动终端”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。This application claims priority to the Chinese Patent Application filed on October 19, 2015, the Chinese Patent Application No. CN201510680017.0, entitled "A Method for Acquiring Calibration Parameters of a Fingerprint Sensor, and a Mobile Terminal". The entire contents of this application are incorporated herein by reference.
技术领域Technical field
本发明实施例涉及移动终端技术领域，尤其涉及一种指纹传感器的校准参数的获取方法、装置及移动终端。The embodiments of the present invention relate to the field of mobile terminal technologies, and in particular, to a method, an apparatus, and a mobile terminal for acquiring calibration parameters of a fingerprint sensor.
背景技术Background technique
随着终端技术和图像处理技术的发展，指纹识别技术作为一种安全度较高的识别技术已经应用到多个领域，不仅为个人的私密装置带来安全保护，更带来用户使用的方便性。例如，通过指纹识别技术对终端或终端上的应用软件或文件进行加密或者解锁，为用户带来了良好的体验。With the development of terminal technology and image processing technology, fingerprint recognition technology has been applied to many fields as a highly secure identification technology, which not only brings security protection to personal privacy devices, but also brings convenience to users. . For example, the fingerprinting technology is used to encrypt or unlock the application software or files on the terminal or the terminal, which brings a good experience to the user.
一般来说，移动终端的指纹传感器的指纹识别过程主要包括以下三个步骤：1、对指纹传感器进行校准并获取校准参数；2、根据校准参数进行指纹图像的抓取；3、将抓取的指纹图像与预先存储的指纹图像进行匹配。因为，在通过指纹传感器抓取用户的指纹图像时需要用户通过手指接触移动终端指纹传感器的表面，来抓取用户的指纹信息，不可避免地，指纹传感器表面会存在有液体的情况。现有技术中，无论指纹传感器表面是否有液体，在用户接触指纹传感之后，都获取相同的校准参数值进行指纹图像的抓取，导致抓取的指纹图像的准确率低，进而导致所述指纹图像与预先存储的指纹图像匹配不上，降低了指纹的识别率。Generally speaking, the fingerprint recognition process of the fingerprint sensor of the mobile terminal mainly includes the following three steps: 1. calibrating the fingerprint sensor and obtaining calibration parameters; 2. performing fingerprint image capture according to the calibration parameter; 3. grasping the captured image The fingerprint image is matched with a pre-stored fingerprint image. Because, when the fingerprint image of the user is captured by the fingerprint sensor, the user needs to touch the surface of the fingerprint sensor of the mobile terminal through the finger to capture the fingerprint information of the user. Inevitably, there is a liquid on the surface of the fingerprint sensor. In the prior art, regardless of whether there is liquid on the surface of the fingerprint sensor, after the user touches the fingerprint sensing, the same calibration parameter value is acquired to capture the fingerprint image, resulting in low accuracy of the captured fingerprint image, thereby causing the The fingerprint image does not match the pre-stored fingerprint image, which reduces the recognition rate of the fingerprint.
技术问题technical problem
本发明实施例提供一种指纹传感器的校准参数的获取方法、装置及移动终端，以提升获取指纹传感器的校准参数的准确率。Embodiments of the present invention provide a method, a device, and a mobile terminal for acquiring calibration parameters of a fingerprint sensor, so as to improve the accuracy of obtaining calibration parameters of the fingerprint sensor.
技术解决方案Technical solution
在第一方面，本发明实施例提供了一种指纹传感器的校准参数的获取方法，包括：In a first aspect, an embodiment of the present invention provides a method for acquiring a calibration parameter of a fingerprint sensor, including:
在检测到校准参数获取触发事件时，基于预设判定方法判定指纹传感器表面是否有液体；When the calibration parameter acquisition trigger event is detected, determining whether there is liquid on the surface of the fingerprint sensor based on the preset determination method;
根据判定结果确定对应的预设校准参数值，以支持根据所述预设校准参数值进行指纹图像的抓取。Corresponding preset calibration parameter values are determined according to the determination result to support the capture of the fingerprint image according to the preset calibration parameter values.
在第二方面，本发明实施例提供一种指纹传感器的校准参数的获取装置，包括：In a second aspect, an embodiment of the present invention provides a device for acquiring calibration parameters of a fingerprint sensor, including:
判定模块，用于在检测到校准参数获取触发事件时，基于预设判定方法判定指纹传感器表面是否有液体；a determining module, configured to determine, according to a preset determination method, whether there is liquid on the surface of the fingerprint sensor when the calibration parameter acquisition trigger event is detected;
校准参数值确定模块，用于根据判定结果确定对应的预设校准参数值，以支持根据所述预设校准参数值进行指纹图像的抓取。The calibration parameter value determining module is configured to determine a corresponding preset calibration parameter value according to the determination result, to support the capturing of the fingerprint image according to the preset calibration parameter value.
在第三方面，本发明实施例还提供一种移动终端，包括指纹传感器，及与所述指纹传感器连接的指纹传感器的校准参数的获取装置，所述指纹传感器的校准参数的获取装置包括：In a third aspect, an embodiment of the present invention further provides a mobile terminal, including a fingerprint sensor, and a device for acquiring calibration parameters of a fingerprint sensor connected to the fingerprint sensor, where the calibration parameter acquisition device includes:
判定模块，用于在检测到校准参数获取触发事件时，基于预设判定方法判定指纹传感器表面是否有液体；a determining module, configured to determine, according to a preset determination method, whether there is liquid on the surface of the fingerprint sensor when the calibration parameter acquisition trigger event is detected;
校准参数值确定模块，用于根据判定结果确定对应的预设校准参数值，以支持根据所述预设校准参数值进行指纹图像的抓取。The calibration parameter value determining module is configured to determine a corresponding preset calibration parameter value according to the determination result, to support the capturing of the fingerprint image according to the preset calibration parameter value.
有益效果 Beneficial effect
本发明实施例提供的指纹传感器的校准参数的获取方法、装置及移动终端，通过判定指纹传感器表面是否有液体，根据判定结果确定指纹传感器对应的预设校准参数值以进行指纹图像抓取的技术手段，解决了现有技术中无论指纹传感器表面是否有液体，都获取相同的校准参数值进行指纹图像的抓取，导致所获取的抓取指纹图像的校准参数准确率低的技术问题，提升了获取指纹传感器的校准参数的准确率，以及抓取的指纹图像的准确度。The method, device and mobile terminal for acquiring the calibration parameters of the fingerprint sensor provided by the embodiment of the present invention determine the preset calibration parameter value corresponding to the fingerprint sensor according to the determination result by determining whether there is liquid on the surface of the fingerprint sensor to perform fingerprint image capture The method solves the technical problem that the same calibration parameter value is acquired for the fingerprint image capture in the prior art regardless of whether there is liquid on the surface of the fingerprint sensor, which leads to a technical problem that the acquired calibration parameter of the captured fingerprint image has low accuracy, and the technical problem is improved. Obtain the accuracy of the calibration parameters of the fingerprint sensor and the accuracy of the captured fingerprint image.
附图说明DRAWINGS
附图说明DRAWINGS
图1是本发明实施例一提供的指纹传感器的校准参数的获取方法的流程图；1 is a flowchart of a method for acquiring calibration parameters of a fingerprint sensor according to Embodiment 1 of the present invention;
图2是本发明实施例二提供的指纹传感器的校准参数的获取方法的流程图；2 is a flowchart of a method for acquiring calibration parameters of a fingerprint sensor according to Embodiment 2 of the present invention;
图3是本发明实施例三提供的指纹传感器的校准参数的获取方法的流程图；3 is a flowchart of a method for acquiring calibration parameters of a fingerprint sensor according to Embodiment 3 of the present invention;
图4是本发明实施例四提供的指纹传感器的校准参数的获取装置的结构示意图；4 is a schematic structural diagram of an apparatus for acquiring calibration parameters of a fingerprint sensor according to Embodiment 4 of the present invention;
图5是本发明实施例五提供的移动终端的结构示意图。FIG. 5 is a schematic structural diagram of a mobile terminal according to Embodiment 5 of the present invention.
本发明的最佳实施方式BEST MODE FOR CARRYING OUT THE INVENTION
具体实施方式detailed description
为了使本发明的目的、技术方案和优点更加清楚，下面结合附图对本发明具体实施例作进一步的详细描述。可以理解的是，此处所描述的具体实施例仅仅用于解释本发明，而非对本发明的限定。另外还需要说明的是，为了便于描述，附图中仅示出了与本发明相关的部分而非全部内容。在更加详细地讨论示例性实施例之前应当提到的是，一些示例性实施例被描述成作为流程图描绘的处理或方法。虽然流程图将各项操作（或步骤）描述成顺序的处理，但是其中的许多操作可以被并行地、并发地或者同时实施。此外，各项操作的顺序可以被重新安排。当其操作完成时所述处理可以被终止，但是还可以具有未包括在附图中的附加步骤。所述处理可以对应于方法、函数、规程、子例程、子程序等等。In order to make the objects, technical solutions and advantages of the present invention more comprehensible, the embodiments of the present invention are further described in detail below. It is understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. It should also be noted that, for ease of description, only some, but not all, of the present invention are shown in the drawings. Before discussing the exemplary embodiments in more detail, it should be noted that some exemplary embodiments are described as a process or method depicted as a flowchart. Although the flowcharts describe various operations (or steps) as a sequential process, many of the operations can be implemented in parallel, concurrently or concurrently. In addition, the order of operations can be rearranged. The process may be terminated when its operation is completed, but may also have additional steps not included in the figures. The processing may correspond to methods, functions, procedures, subroutines, subroutines, and the like.
实施例一Embodiment 1
图1给出了本发明实施例一提供的指纹传感器的校准参数的获取方法的流程图，该方法可以由指纹传感器的校准参数的获取装置来执行。所述装置可由软件和/或硬件实现，可作为移动终端的一部分被内置在移动终端内部。如图1所示，本实施例提供的指纹传感器的校准参数的获取方法具体包括如下步骤：FIG. 1 is a flowchart of a method for acquiring calibration parameters of a fingerprint sensor according to Embodiment 1 of the present invention, which may be performed by a calibration parameter acquisition device of a fingerprint sensor. The apparatus may be implemented by software and/or hardware and may be built into the mobile terminal as part of the mobile terminal. As shown in FIG. 1 , the method for acquiring calibration parameters of the fingerprint sensor provided in this embodiment specifically includes the following steps:
步骤101、在检测到校准参数获取触发事件时，基于预设判定方法判定指纹传感器表面是否有液体。Step 101: When detecting a calibration parameter acquisition trigger event, determine whether there is liquid on the surface of the fingerprint sensor based on the preset determination method.
本实施例中所述的移动终端包括但不限定于手机、平板电脑、笔记本。The mobile terminal described in this embodiment includes, but is not limited to, a mobile phone, a tablet computer, and a notebook.
其中，所述校准参数获取触发事件可以为任意在检测到用户作用于指纹传感器的操作之前检测到一些预设指令的事件，例如，在移动终端运行应用软件时，比如微信支付时，在用户作用于指纹传感器之前，只要检测到微信支付相关指令，则会生成校准参数获取触发事件，在用户作用于传感器之前获取校准参数。The calibration parameter acquisition trigger event may be any event that detects some preset instruction before detecting that the user acts on the fingerprint sensor, for example, when the mobile terminal runs the application software, such as WeChat payment, Before the fingerprint sensor, as long as the WeChat payment related instruction is detected, a calibration parameter acquisition trigger event is generated, and the calibration parameter is acquired before the user acts on the sensor.
其中，所述液体可以为水。Wherein the liquid may be water.
步骤102、根据判定结果确定对应的预设校准参数值，以支持根据所述预设校准参数值进行指纹图像的抓取。Step 102: Determine a corresponding preset calibration parameter value according to the determination result, to support the capture of the fingerprint image according to the preset calibration parameter value.
所述根据判定结果确定对应的预设参数可以为：在所述指纹传感器表面没有液体时，确定对应的预设校准参数值为第一预设校准参数值；在所述指纹传感器表面有液体时，确定对应的预设校准参数值为第二预设校准参数值。也可以为：先根据判定结果，从该判定结果中获取指纹传感器表面的湿度，再根据该指纹传感器的湿度获取对应的预设校准参数值。其中，所述湿度可以分为多个等级，每一个湿度等级对应一个预设校准参数值。综上所述，在该指纹传感器表面有液体时，获取该指纹传感器表面的湿度等级；再获取该湿度等级对应的预设校准参数值；最后将该预设校准参数值设置为第二预设校准参数值，以支持根据所述第二预设校准参数值进行指纹图像的抓取。所述预设校准参数值为预先设定并存储到系统中的校准参数值，这样设置的好处是：可以解决现有技术中在抓取指纹图像之前需要自动校准生成校准参数导致的指纹传感器校准时间较长的问题。The determining the corresponding preset parameter according to the determination result may be: when there is no liquid on the surface of the fingerprint sensor, determining that the corresponding preset calibration parameter value is a first preset calibration parameter value; when the fingerprint sensor surface has a liquid And determining that the corresponding preset calibration parameter value is the second preset calibration parameter value. The method may also be: first, according to the determination result, obtaining the humidity of the surface of the fingerprint sensor from the determination result, and acquiring a corresponding preset calibration parameter value according to the humidity of the fingerprint sensor. The humidity may be divided into multiple levels, and each humidity level corresponds to a preset calibration parameter value. In summary, when there is liquid on the surface of the fingerprint sensor, the humidity level of the surface of the fingerprint sensor is acquired; and the preset calibration parameter value corresponding to the humidity level is obtained; finally, the preset calibration parameter value is set to the second preset. The parameter values are calibrated to support the capture of the fingerprint image based on the second preset calibration parameter value. The preset calibration parameter value is a calibration parameter value preset and stored in the system, and the benefit of the setting is that the fingerprint sensor calibration caused by the automatic calibration and generating the calibration parameter before the fingerprint image is captured in the prior art can be solved. A long time problem.
在确定了校准参数值之后，若检测到用户作用于指纹传感器的操作指令，则根据所述预设校准参数值进行指纹图像的抓取。After the calibration parameter value is determined, if an operation instruction of the user acting on the fingerprint sensor is detected, the fingerprint image is captured according to the preset calibration parameter value.
本发明实施例一提供的指纹传感器的校准参数的获取方法，通过判定指纹传感器表面是否有液体，根据判定结果确定指纹传感器对应的预设校准参数值以进行指纹图像抓取的技术手段，解决了现有技术中无论指纹传感器表面是否有液体，都获取相同的校准参数值进行指纹图像的抓取，导致所获取的抓取指纹图像的校准参数准确率低的技术问题，提升了获取指纹传感器的校准参数的准确率，以及抓取的指纹图像的准确度。The method for acquiring calibration parameters of the fingerprint sensor provided by the first embodiment of the present invention solves the technical means for determining the preset calibration parameter value corresponding to the fingerprint sensor according to the determination result by determining whether there is liquid on the surface of the fingerprint sensor, and solving the fingerprint image. In the prior art, regardless of whether there is liquid on the surface of the fingerprint sensor, the same calibration parameter value is acquired for fingerprint image capture, resulting in a technical problem that the acquired calibration parameter of the captured fingerprint image has low accuracy, and the acquisition of the fingerprint sensor is improved. The accuracy of the calibration parameters and the accuracy of the captured fingerprint image.
实施例二Embodiment 2
图2给出了本发明实施例二提供的指纹传感器的校准参数的获取方法的流程图。本发明以实施例一为基础进行优化，在本实施例中，将根据判定结果确定对应的预设校准参数值，以支持根据所述预设校准参数值进行指纹图像的抓取具体优化为：在所述指纹传感器表面没有液体时，确定对应的预设校准参数值为第一预设校准参数值，以支持根据所述第一预设校准参数值进行指纹图像的抓取；在所述指纹传感器表面有液体时，确定对应的预设校准参数值为第二预设校准参数值，以支持根据所述第二预设校准参数值进行指纹图像的抓取。FIG. 2 is a flow chart showing a method for acquiring calibration parameters of a fingerprint sensor according to Embodiment 2 of the present invention. The present invention is optimized based on the first embodiment. In this embodiment, the corresponding preset calibration parameter value is determined according to the determination result, so as to support the capture of the fingerprint image according to the preset calibration parameter value, and the optimization is: When there is no liquid on the surface of the fingerprint sensor, determining that the corresponding preset calibration parameter value is a first preset calibration parameter value, to support capturing 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 to support the capture of the fingerprint image according to the second preset calibration parameter value.
相应的，如图2所示，本实施例提供的指纹传感器的校准参数的获取方法包括以下步骤：Correspondingly, as shown in FIG. 2, the method for acquiring calibration parameters of the fingerprint sensor provided by this embodiment includes the following steps:
步骤201、在检测到校准参数获取触发事件时，基于预设判定方法判定指纹传感器表面是否有液体。Step 201: When detecting the calibration parameter acquisition trigger event, determine whether there is liquid on the surface of the fingerprint sensor based on the preset determination method.
步骤202、在所述指纹传感器表面没有液体时，确定对应的预设校准参数值为第一预设校准参数值，以支持根据所述第一预设校准参数值进行指纹图像的抓取。其中，所述第一预设校准参数值包括第一预设增益值和第一预设偏移值。Step 202: When there is no liquid on the surface of the fingerprint sensor, determine that the corresponding preset calibration parameter value is a first preset calibration parameter value, to support the capture of the fingerprint image according to the first preset calibration parameter value. The first preset calibration parameter value includes a first preset gain value and a first preset offset value.
示例性的，指纹图像的输入信号为x，根据校准参数抓取的指纹图像数据为y，则可以存在第一预设校准参数值k、b满足直线方程y=kx+b，其中，k为第一预设增益值，b为第一预设偏移值。所述第一预设增益值k用于对指纹图像的输入信号进行较大幅度的调整，所述第一预设偏移值b用于对指纹图像的输入信号进行微调。Exemplarily, the input signal of the fingerprint image is x, and the fingerprint image data captured according to the calibration parameter is y, then the first preset calibration parameter values k, b may satisfy the linear equation y=kx+b, where k is The first preset gain value, b is the first preset offset value. The first preset gain value k is used to perform a large-scale adjustment on the input signal of the fingerprint image, and the first preset offset value b is used to fine-tune the input signal of the fingerprint image.
步骤203、在所述指纹传感器表面有液体时，确定对应的预设校准参数值为第二预设校准参数值，以支持根据所述第二预设校准参数值进行指纹图像的抓取。其中，所述第二预设校准参数值包括第二预设增益值和第二预设偏移值，所述第一预设增益值小于第二预设增益值。因为，在指纹传感器表面没有液体时，用户手指作用于指纹传感器时指纹传感器的电容变化要大，对应的用于抓取指纹图像的增益值要小，在指纹传感器表面有液体时，指纹传感器的电容变化要小，对应的用于抓取指纹图像的增益值要大。Step 203: When there is liquid on the surface of the fingerprint sensor, determine that the corresponding preset calibration parameter value is a second preset calibration parameter value, to support the capture of the fingerprint image according to the second preset calibration parameter value. The second preset calibration parameter value includes a second preset gain value and a second preset offset value, where the first preset gain value is smaller than the second preset gain value. Because, when there is no liquid on the surface of the fingerprint sensor, the capacitance of the fingerprint sensor changes when the user's finger acts on the fingerprint sensor, and the corresponding gain value for capturing the fingerprint image is small. When there is liquid on the surface of the fingerprint sensor, the fingerprint sensor The change in capacitance is small, and the corresponding gain value for capturing the fingerprint image is large.
本实施例将指纹传感器表面是否有液体的判定结果分为有液体和没有液体两种情况，每一种情况分别对应一个预设校准参数值，有液体对应的预设校准参数值和没有液体时对应的预设校准参数值可能相差比较明显；在指纹传感器表面有液体时其湿度等级不同对应的预设校准参数值相差不是很明显。虽然在有液体时对不同湿度等级设置不同的预设校准参数值，可以提高校准参数获取的准确性，但根据指纹传感器表面有液体和没有液体两种判定结果确定对应的预设校准参数值，可以在保证获取校准参数准确率的基础上，缩短确定校准参数的时间。In this embodiment, the determination result of whether there is liquid on the surface of the fingerprint sensor is divided into two cases: a liquid and no liquid, each of which corresponds to a preset calibration parameter value, a preset calibration parameter value corresponding to the liquid, and no liquid. The corresponding preset calibration parameter values may be significantly different; when there is liquid on the surface of the fingerprint sensor, the difference between the preset calibration parameter values and the humidity level is not obvious. Although different preset calibration parameter values are set for different humidity levels when there is liquid, the accuracy of the calibration parameter acquisition can be improved, but the corresponding preset calibration parameter values are determined according to the liquid crystal and no liquid determination results on the surface of the fingerprint sensor. The time to determine the calibration parameters can be shortened on the basis of ensuring the accuracy of the calibration parameters.
本发明实施例二提供的指纹传感器的校准参数的获取方法，通过判定指纹传感器表面是否有液体，在所述指纹传感器表面没有液体时，确定对应的预设校准参数值为第一预设校准参数值，在所述指纹传感器表面有液体时，确定对应的预设校准参数值为第二预设校准参数值，以支持根据所述第一预设校准参数值或第二预设校准参数值进行指纹图像的抓取，解决了现有技术中无论指纹传感器表面是否有液体，都获取相同的校准参数值进行指纹图像的抓取，导致所获取的抓取指纹图像的校准参数准确率低的技术问题，提升了获取指纹传感器的校准参数的准确率，以及抓取的指纹图像的准确度，同时缩短了确定校准参数的时间，加快了根据校准参数进行指纹图像抓取的速度。The method for obtaining calibration parameters of the fingerprint sensor provided by the second embodiment of the present invention determines whether the corresponding preset calibration parameter value is the first preset calibration parameter when determining whether there is liquid on the surface of the fingerprint sensor and there is no liquid on the surface of the fingerprint sensor. a value, when the fingerprint sensor surface has a liquid, determining that the corresponding preset calibration parameter value is a second preset calibration parameter value, to support performing according to the first preset calibration parameter value or the second preset calibration parameter value. The capture of the fingerprint image solves the prior art technique of acquiring the same calibration parameter value to capture the fingerprint image regardless of whether there is liquid on the surface of the fingerprint sensor, resulting in a low accuracy of the calibration parameters of the captured fingerprint image. The problem is to improve the accuracy of obtaining the calibration parameters of the fingerprint sensor, and the accuracy of the captured fingerprint image, and shorten the time for determining the calibration parameters, and speed up the capture of the fingerprint image according to the calibration parameters.
实施例三Embodiment 3
图3给出了本发明实施例三提供的指纹传感器的校准参数的获取方法的流程图。本实施例以实施例一为基础进行优化，在本实施例中，将根据判定结果确定对应的预设校准参数值，以支持根据所述预设校准参数值进行指纹图像的抓取具体优化为：在所述指纹传感器表面没有液体时，确定对应的预设校准参数值为第一预设校准参数值，以支持根据所述第一预设校准参数值进行指纹图像的抓取；在所述指纹传感器表面有液体时，控制指纹传感器升温，以去除所述指纹传感器表面的液体，并确定对应的预设校准参数值为第一预设校准参数值，以支持根据所述第一预设校准参数值进行指纹图像的抓取。FIG. 3 is a flow chart showing a method for acquiring calibration parameters of a fingerprint sensor according to Embodiment 3 of the present invention. The embodiment is optimized based on the first embodiment. In this embodiment, the corresponding preset calibration parameter value is determined according to the determination result, so as to support the capture of the fingerprint image according to the preset calibration parameter value. And determining that the corresponding preset calibration parameter value is a first preset calibration parameter value when the fingerprint sensor surface has no liquid, to support the capture of the fingerprint image according to the first preset calibration parameter value; When the surface of the fingerprint sensor has a liquid, the fingerprint sensor is heated to remove the liquid on the surface of the fingerprint sensor, and the corresponding preset calibration parameter value is determined to be a first preset calibration parameter value to support calibration according to the first preset. The parameter value is used to capture the fingerprint image.
相应的，如图3所示，本实施例提供的指纹传感器的校准参数的获取方法包括以下步骤：Correspondingly, as shown in FIG. 3, the method for acquiring calibration parameters of the fingerprint sensor provided by this embodiment includes the following steps:
步骤301、在检测到校准参数获取触发事件时，基于预设判定方法判定指纹传感器表面是否有液体。Step 301: When detecting a calibration parameter acquisition trigger event, determine whether there is liquid on the surface of the fingerprint sensor based on the preset determination method.
该步骤具体可以包括：在检测到校准参数获取触发事件时，获取指纹传感器的当前电容值；计算所述当前电容值和预设电容基准值的差值；若所述差值在预设阈值内，则判定所述指纹传感器表面有液体，否则判定所述指纹传感器表面没有液体。Specifically, the step may include: acquiring a current capacitance value of the fingerprint sensor when detecting the calibration parameter acquisition trigger event; calculating a difference between the current capacitance value and the preset capacitance reference value; if the difference is within a preset threshold Then, it is determined that there is liquid on the surface of the fingerprint sensor, otherwise it is determined that there is no liquid on the surface of the fingerprint sensor.
其中，所述预设电容基准值为指纹传感器在出厂前，其表面没有液体时所测得的电容值，并将所述预设电容基准值预先存储到系统中。The preset capacitance reference value is a capacitance value measured when the fingerprint sensor has no liquid on the surface thereof before leaving the factory, and the preset capacitance reference value is pre-stored in the system.
步骤302、在所述指纹传感器表面没有液体时，确定对应的预设校准参数值为第一预设校准参数值，以支持根据所述第一预设校准参数值进行指纹图像的抓取。Step 302: When there is no liquid on the surface of the fingerprint sensor, determine that the corresponding preset calibration parameter value is a first preset calibration parameter value, to support the capture of the fingerprint image according to the first preset calibration parameter value.
步骤303、在所述指纹传感器表面有液体时，控制指纹传感器升温，以去除所述指纹传感器表面的液体，并确定对应的预设校准参数值为第一预设校准参数值，以支持根据所述第一预设校准参数值进行指纹图像的抓取。Step 303: When there is liquid on the surface of the fingerprint sensor, control the temperature of the fingerprint sensor to remove the liquid on the surface of the fingerprint sensor, and determine that the corresponding preset calibration parameter value is the first preset calibration parameter value, to support the The first preset calibration parameter value is used to capture the fingerprint image.
其中，所述控制指纹传感器升温可以包括：增大所述指纹传感器的功率，以使所述指纹传感器升温；或者控制所述指纹传感器对应的加热器件对所述指纹传感器进行加热，以使所述指纹传感器升温。The controlling the temperature of the fingerprint sensor may include: increasing the power of the fingerprint sensor to increase the temperature of the fingerprint sensor; or controlling a heating device corresponding to the fingerprint sensor to heat the fingerprint sensor, so that the The fingerprint sensor heats up.
其中，所述增大所述指纹传感器的功率可以相同的增大速率增大所述功率，也可以以阶梯变化的增大速率增大所述功率；所述控制所述指纹传感器对应的加热器件对所述指纹传感器进行加热可以是以相同的加热速率加热指纹传感器，也可以是以阶梯变化的加热速率加热指纹传感器，本实施例对此不进行限制。The increasing the power of the fingerprint sensor may increase the power at the same increasing rate, or increasing the power at an increasing rate of a step change; the controlling the heating device corresponding to the fingerprint sensor The fingerprint sensor may be heated to heat the fingerprint sensor at the same heating rate, or the fingerprint sensor may be heated at a stepwise heating rate, which is not limited in this embodiment.
另外，在所述指纹传感器表面有液体时，也可以发出指纹传感器表面有液体的提示信息，以提示用户去除所述指纹传感器表面的液体。In addition, when there is liquid on the surface of the fingerprint sensor, prompt information of liquid on the surface of the fingerprint sensor may also be issued to prompt the user to remove the liquid on the surface of the fingerprint sensor.
本发明实施例三提供的指纹传感器的校准参数的获取方法，通过指纹传感器电容的变化判定指纹传感器表面是否有液体，在所述指纹传感器表面没有液体时，确定对应的预设校准参数值为第一预设校准参数值，在所述指纹传感器表面有液体时，控制指纹传感器升温，以去除所述指纹传感器表面的液体，并确定对应的预设校准参数值为第一预设校准参数值，以支持根据所述第一预设校准参数值进行指纹图像的抓取，解决了现有技术中无论指纹传感器表面是否有液体，都立即获取相同的校准参数值进行指纹图像的抓取，导致所获取的抓取指纹图像的校准参数准确率低的技术问题，提升了获取指纹传感器的校准参数的准确率，以及抓取的指纹图像的准确度。The method for obtaining calibration parameters of the fingerprint sensor provided by the third embodiment of the present invention determines whether there is liquid on the surface of the fingerprint sensor by the change of the capacitance of the fingerprint sensor. When there is no liquid on the surface of the fingerprint sensor, the corresponding preset calibration parameter value is determined. a preset calibration parameter value, when there is liquid on the surface of the fingerprint sensor, controlling the temperature of the fingerprint sensor to remove the liquid on the surface of the fingerprint sensor, and determining that the corresponding preset calibration parameter value is the first preset calibration parameter value, In order to support the capture of the fingerprint image according to the first preset calibration parameter value, the prior art obtains the same calibration parameter value to capture the fingerprint image regardless of whether the fingerprint sensor surface has liquid, thereby causing the fingerprint image to be captured. The obtained technical problem of low accuracy of the calibration parameters of the captured fingerprint image improves the accuracy of obtaining the calibration parameters of the fingerprint sensor and the accuracy of the captured fingerprint image.
实施例四Embodiment 4
图4给出了本发明实施例四提供的指纹传感器的校准参数的获取装置的结构示意图。如图4所示，本发明实施例四提供的指纹传感器的校准参数的获取装置包括：FIG. 4 is a schematic structural diagram of an apparatus for acquiring calibration parameters of a fingerprint sensor according to Embodiment 4 of the present invention. As shown in FIG. 4, the apparatus for acquiring calibration parameters of a fingerprint sensor according to Embodiment 4 of the present invention includes:
判定模块41，用于在检测到校准参数获取触发事件时，基于预设判定方法判定指纹传感器表面是否有液体；The determining module 41 is configured to determine, according to a preset determination method, whether there is liquid on the surface of the fingerprint sensor when the calibration parameter acquisition trigger event is detected;
校准参数值确定模块42，用于根据判定结果确定对应的预设校准参数值，以支持根据所述预设校准参数值进行指纹图像的抓取。The calibration parameter value determining module 42 is configured to determine a corresponding preset calibration parameter value according to the determination result, to support the capturing of the fingerprint image according to the preset calibration parameter value.
优选的是，所述校准参数值确定模块42具体用于：Preferably, the calibration parameter value determining module 42 is specifically configured to:
在所述指纹传感器表面没有液体时，确定对应的预设校准参数值为第一预设校准参数值，以支持根据所述第一预设校准参数值进行指纹图像的抓取；When there is no liquid on the surface of the fingerprint sensor, determining that the corresponding preset calibration parameter value is a first preset calibration parameter value, to support the capture of the fingerprint image according to the first preset calibration parameter value;
在所述指纹传感器表面有液体时，确定对应的预设校准参数值为第二预设校准参数值，以支持根据所述第二预设校准参数值进行指纹图像的抓取。When there is liquid on the surface of the fingerprint sensor, determining that the corresponding preset calibration parameter value is a second preset calibration parameter value, to support the capture of the fingerprint image according to the second preset calibration parameter value.
优选的是，所述校准参数值确定模块42具体用于：Preferably, the calibration parameter value determining module 42 is specifically configured to:
在所述指纹传感器表面有液体时，获取所述指纹传感器表面的湿度等级；Obtaining a humidity level of the surface of the fingerprint sensor when there is liquid on the surface of the fingerprint sensor;
获取所述湿度等级对应的预设校准参数值；Obtaining a preset calibration parameter value corresponding to the humidity level;
将所述预设校准参数值设置为第二预设校准参数值，以支持根据所述第二预设校准参数值进行指纹图像的抓取。Setting the preset calibration parameter value to a second preset calibration parameter value to support capturing of the fingerprint image according to the second preset calibration parameter value.
优选的是，所述校准参数值确定模块42包括：Preferably, the calibration parameter value determining module 42 includes:
第一校准参数值确定单元，用于在所述指纹传感器表面没有液体时，确定对应的预设校准参数值为第一预设校准参数值，以支持根据所述第一预设校准参数值进行指纹图像的抓取；a first calibration parameter value determining unit, configured to determine, when the fingerprint sensor surface has no liquid, a corresponding preset calibration parameter value as a first preset calibration parameter value, to support performing according to the first preset calibration parameter value Grasping of fingerprint images;
指纹传感器升温单元，用于在所述指纹传感器表面有液体时，控制指纹传感器升温，以去除所述指纹传感器表面的液体；a fingerprint sensor temperature increasing unit, configured to control temperature rise of the fingerprint sensor to remove liquid on the surface of the fingerprint sensor when there is liquid on the surface of the fingerprint sensor;
第二校准参数值确定单元，用于确定对应的预设校准参数值为第一预设校准参数值，以支持根据所述第一预设校准参数值进行指纹图像的抓取。The second calibration parameter value determining unit is configured to determine that the corresponding preset calibration parameter value is the first preset calibration parameter value, to support the capturing of the fingerprint image according to the first preset calibration parameter value.
优选的是，所述第一预设校准参数值包括第一预设增益值和第一预设偏移值，所述第二预设校准参数值包括第二预设增益值和第二预设偏移值，所述第一预设增益值小于第二预设增益值。Preferably, the first preset calibration parameter value includes a first preset gain value and a first preset offset value, and the second preset calibration parameter value includes a second preset gain value and a second preset And an offset value, where the first preset gain value is smaller than the second preset gain value.
优选的是，所述判定模块41具体用于：Preferably, the determining module 41 is specifically configured to:
在检测到校准参数获取触发事件时，获取指纹传感器的当前电容值；Obtaining a current capacitance value of the fingerprint sensor when the calibration parameter acquisition trigger event is detected;
计算所述当前电容值和预设电容基准值的差值；Calculating a difference between the current capacitance value and a preset capacitance reference value;
若所述差值在预设阈值内，则判定所述指纹传感器表面有液体，否则判定所述指纹传感器表面没有液体。If the difference is within a preset threshold, it is determined that there is liquid on the surface of the fingerprint sensor, otherwise it is determined that there is no liquid on the surface of the fingerprint sensor.
优选的是，所述指纹传感器升温单元具体用于：Preferably, the fingerprint sensor heating unit is specifically configured to:
在所述指纹传感器表面有液体时，增大所述指纹传感器的功率，以使所述指纹传感器升温；或者，在所述指纹传感器表面有液体时，控制所述指纹传感器对应的加热器件对所述指纹传感器进行加热，以使所述指纹传感器升温。 When the surface of the fingerprint sensor has a liquid, increase the power of the fingerprint sensor to heat the fingerprint sensor; or, when there is liquid on the surface of the fingerprint sensor, control a heating device corresponding to the fingerprint sensor. The fingerprint sensor is heated to warm the fingerprint sensor.
本发明实施例提供的指纹传感器的校准参数的获取装置可执行本发明任意实施例提供的指纹传感器的校准参数的获取方法，具备执行方法相应的功能模块和有益效果。The acquiring device of the calibration parameter of the fingerprint sensor provided by the embodiment of the present invention may perform the method for acquiring the calibration parameter of the fingerprint sensor provided by any embodiment of the present invention, and has a function module and a beneficial effect corresponding to the execution method.
实施例五Embodiment 5
图5给出了本发明实施例五提供的移动终端的结构示意图，其中该移动终端5包括指纹传感器51，及与所述指纹传感器51连接的指纹传感器的校准参数的获取装置52。其中指纹传感器的校准参数的获取装置52包括：FIG. 5 is a schematic structural diagram of a mobile terminal according to Embodiment 5 of the present invention, wherein the mobile terminal 5 includes a fingerprint sensor 51, and a acquiring parameter 52 of a calibration parameter of the fingerprint sensor connected to the fingerprint sensor 51. The obtaining device 52 of the calibration parameter of the fingerprint sensor includes:
判定模块521，用于在检测到校准参数获取触发事件时，基于预设判定方法判定指纹传感器表面是否有液体；The determining module 521 is configured to determine, according to a preset determination method, whether there is liquid on the surface of the fingerprint sensor when the calibration parameter acquisition trigger event is detected;
校准参数值确定模块522，用于根据判定结果确定对应的预设校准参数值，以支持根据所述预设校准参数值进行指纹图像的抓取。The calibration parameter value determining module 522 is configured to determine a corresponding preset calibration parameter value according to the determination result, to support the capturing of the fingerprint image according to the preset calibration parameter value.
优选的是，所述校准参数值确定模块522具体用于：Preferably, the calibration parameter value determining module 522 is specifically configured to:
在所述指纹传感器表面没有液体时，确定对应的预设校准参数值为第一预设校准参数值，以支持根据所述第一预设校准参数值进行指纹图像的抓取；When there is no liquid on the surface of the fingerprint sensor, determining that the corresponding preset calibration parameter value is a first preset calibration parameter value, to support the capture of the fingerprint image according to the first preset calibration parameter value;
在所述指纹传感器表面有液体时，确定对应的预设校准参数值为第二预设校准参数值，以支持根据所述第二预设校准参数值进行指纹图像的抓取。When there is liquid on the surface of the fingerprint sensor, determining that the corresponding preset calibration parameter value is a second preset calibration parameter value, to support the capture of the fingerprint image according to the second preset calibration parameter value.
优选的是，所述校准参数值确定模块522具体用于：Preferably, the calibration parameter value determining module 522 is specifically configured to:
在所述指纹传感器表面有液体时，获取所述指纹传感器表面的湿度等级；Obtaining a humidity level of the surface of the fingerprint sensor when there is liquid on the surface of the fingerprint sensor;
获取所述湿度等级对应的预设校准参数值；Obtaining a preset calibration parameter value corresponding to the humidity level;
将所述预设校准参数值设置为第二预设校准参数值，以支持根据所述第二预设校准参数值进行指纹图像的抓取。Setting the preset calibration parameter value to a second preset calibration parameter value to support capturing of the fingerprint image according to the second preset calibration parameter value.
优选的是，所述校准参数值确定模块522包括：Preferably, the calibration parameter value determining module 522 includes:
第一校准参数值确定单元，用于在所述指纹传感器表面没有液体时，确定对应的预设校准参数值为第一预设校准参数值，以支持根据所述第一预设校准参数值进行指纹图像的抓取；a first calibration parameter value determining unit, configured to determine, when the fingerprint sensor surface has no liquid, a corresponding preset calibration parameter value as a first preset calibration parameter value, to support performing according to the first preset calibration parameter value Grasping of fingerprint images;
指纹传感器升温单元，用于在所述指纹传感器表面有液体时，控制指纹传感器升温，以去除所述指纹传感器表面的液体；a fingerprint sensor temperature increasing unit, configured to control temperature rise of the fingerprint sensor to remove liquid on the surface of the fingerprint sensor when there is liquid on the surface of the fingerprint sensor;
第二校准参数值确定单元，用于确定对应的预设校准参数值为第一预设校准参数值，以支持根据所述第一预设校准参数值进行指纹图像的抓取。The second calibration parameter value determining unit is configured to determine that the corresponding preset calibration parameter value is the first preset calibration parameter value, to support the capturing of the fingerprint image according to the first preset calibration parameter value.
优选的是，所述第一预设校准参数值包括第一预设增益值和第一预设偏移值，所述第二预设校准参数值包括第二预设增益值和第二预设偏移值，所述第一预设增益值小于第二预设增益值。Preferably, the first preset calibration parameter value includes a first preset gain value and a first preset offset value, and the second preset calibration parameter value includes a second preset gain value and a second preset And an offset value, where the first preset gain value is smaller than the second preset gain value.
优选的是，所述判定模块521具体用于：Preferably, the determining module 521 is specifically configured to:
在检测到校准参数获取触发事件时，获取指纹传感器的当前电容值；Obtaining a current capacitance value of the fingerprint sensor when the calibration parameter acquisition trigger event is detected;
计算所述当前电容值和预设电容基准值的差值；Calculating a difference between the current capacitance value and a preset capacitance reference value;
若所述差值在预设阈值内，则判定所述指纹传感器表面有液体，否则判定所述指纹传感器表面没有液体。If the difference is within a preset threshold, it is determined that there is liquid on the surface of the fingerprint sensor, otherwise it is determined that there is no liquid on the surface of the fingerprint sensor.
优选的是，所述指纹传感器升温单元具体用于：Preferably, the fingerprint sensor heating unit is specifically configured to:
在所述指纹传感器表面有液体时，增大所述指纹传感器的功率，以使所述指纹传感器升温；或者，在所述指纹传感器表面有液体时，控制所述指纹传感器对应的加热器件对所述指纹传感器进行加热，以使所述指纹传感器升温。 When the surface of the fingerprint sensor has a liquid, increase the power of the fingerprint sensor to heat the fingerprint sensor; or, when there is liquid on the surface of the fingerprint sensor, control a heating device corresponding to the fingerprint sensor. The fingerprint sensor is heated to warm the fingerprint sensor.
本发明实施例提供的移动终端采用了本发明提供的指纹传感器的校准参数的获取装置，可执行本发明任意实施例提供的指纹传感器的校准参数的获取方法，具备执行方法相应的功能模块和有益效果。The mobile terminal provided by the embodiment of the present invention adopts the acquiring device of the calibration parameter of the fingerprint sensor provided by the present invention, and can execute the method for acquiring the calibration parameter of the fingerprint sensor provided by any embodiment of the present invention, and has the corresponding functional module and the beneficial method of the execution method. effect.
需要说明的是，本领域普通技术人员可以理解上述实施例的各种方法中的全部或部分步骤是可以通过程序来指令相关的硬件来完成，该程序可以存储于计算机可读存储介质中，如存储在终端的存储器中，并被该终端内的至少一个处理器执行，在执行过程中可包括如信息发布方法的实施例的流程。其中，存储介质可以包括：只读存储器（ROM，Read Only Memory）、随机存取记忆体（RAM，Random Access Memory）、磁盘或光盘等。It should be noted that those skilled in the art can understand that all or part of the steps of the foregoing embodiments can be completed by a program to instruct related hardware, and the program can be stored in a computer readable storage medium, such as It is stored in the memory of the terminal and executed by at least one processor within the terminal, and may include a flow of an embodiment of the information distribution method during execution. The storage medium may include: a read only memory (ROM, Read) Only Memory), Random Access Memory (RAM), disk or CD.
注意，上述仅为本发明的较佳实施例及所运用技术原理。本领域技术人员会理解，本发明不限于这里所述的特定实施例，对本领域技术人员来说能够进行各种明显的变化、重新调整和替代而不会脱离本发明的保护范围。因此，虽然通过以上实施例对本发明进行了较为详细的说明，但是本发明不仅仅限于以上实施例，在不脱离本发明构思的情况下，还可以包括更多其他等效实施例，而本发明的范围由所附的权利要求范围决定。Note that the above are only the preferred embodiments of the present invention and the technical principles applied thereto. Those skilled in the art will appreciate that the present invention is not limited to the specific embodiments described herein, and that various modifications, changes and substitutions may be made without departing from the scope of the invention. Therefore, the present invention has been described in detail by the above embodiments, but the present invention is not limited to the above embodiments, and other equivalent embodiments may be included without departing from the inventive concept. The scope is determined by the scope of the appended claims.

Claims (20)

  1. 一种指纹传感器的校准参数的获取方法，其中包括：A method for obtaining calibration parameters of a fingerprint sensor, comprising:
    在检测到校准参数获取触发事件时，基于预设判定方法判定指纹传感器表面是否有液体；When the calibration parameter acquisition trigger event is detected, determining whether there is liquid on the surface of the fingerprint sensor based on the preset determination method;
    根据判定结果确定对应的预设校准参数值，以支持根据所述预设校准参数值进行指纹图像的抓取。Corresponding preset calibration parameter values are determined according to the determination result to support the capture of the fingerprint image according to the preset calibration parameter values.
  2. 根据权利要求1所述的方法，其中所述根据判定结果确定对应的预设校准参数值，以支持根据所述预设校准参数值进行指纹图像的抓取包括：The method according to claim 1, wherein the determining the corresponding preset calibration parameter value according to the determination result to support the capturing of the fingerprint image according to the preset calibration parameter value comprises:
    在所述指纹传感器表面没有液体时，确定对应的预设校准参数值为第一预设校准参数值，以支持根据所述第一预设校准参数值进行指纹图像的抓取；When there is no liquid on the surface of the fingerprint sensor, determining that the corresponding preset calibration parameter value is a first preset calibration parameter value, to support the capture of the fingerprint image according to the first preset calibration parameter value;
    在所述指纹传感器表面有液体时，确定对应的预设校准参数值为第二预设校准参数值，以支持根据所述第二预设校准参数值进行指纹图像的抓取。When there is liquid on the surface of the fingerprint sensor, determining that the corresponding preset calibration parameter value is a second preset calibration parameter value, to support the capture of the fingerprint image according to the second preset calibration parameter value.
  3. 根据权利要求2所述的方法，其中所述在所述指纹传感器表面有液体时，确定对应的预设校准参数值为第二预设校准参数值，以支持根据所述第二预设校准参数值进行指纹图像的抓取具体包括：The method according to claim 2, wherein when the fingerprint sensor surface has a liquid, determining that a corresponding preset calibration parameter value is a second preset calibration parameter value to support the second preset calibration parameter according to the second preset calibration parameter The value of the fingerprint image capture specifically includes:
    在所述指纹传感器表面有液体时，获取所述指纹传感器表面的湿度等级；Obtaining a humidity level of the surface of the fingerprint sensor when there is liquid on the surface of the fingerprint sensor;
    获取所述湿度等级对应的预设校准参数值；Obtaining a preset calibration parameter value corresponding to the humidity level;
    将所述预设校准参数值设置为第二预设校准参数值，以支持根据所述第二预设校准参数值进行指纹图像的抓取。Setting the preset calibration parameter value to a second preset calibration parameter value to support capturing of the fingerprint image according to the second preset calibration parameter value.
  4. 根据权利要求1所述的方法，其中所述根据判定结果确定对应的预设校准参数值，以支持根据所述预设校准参数值进行指纹图像的抓取包括：The method according to claim 1, wherein the determining the corresponding preset calibration parameter value according to the determination result to support the capturing of the fingerprint image according to the preset calibration parameter value comprises:
    在所述指纹传感器表面没有液体时，确定对应的预设校准参数值为第一预设校准参数值，以支持根据所述第一预设校准参数值进行指纹图像的抓取；When there is no liquid on the surface of the fingerprint sensor, determining that the corresponding preset calibration parameter value is a first preset calibration parameter value, to support the capture of the fingerprint image according to the first preset calibration parameter value;
    在所述指纹传感器表面有液体时，控制指纹传感器升温，以去除所述指纹传感器表面的液体，并确定对应的预设校准参数值为第一预设校准参数值，以支持根据所述第一预设校准参数值进行指纹图像的抓取。When the surface of the fingerprint sensor has a liquid, controlling the temperature of the fingerprint sensor to remove the liquid on the surface of the fingerprint sensor, and determining that the corresponding preset calibration parameter value is a first preset calibration parameter value, to support according to the first Preset calibration parameter values for fingerprint image capture.
  5. 根据权利要求2所述的方法，其中所述第一预设校准参数值包括第一预设增益值和第一预设偏移值，所述第二预设校准参数值包括第二预设增益值和第二预设偏移值，所述第一预设增益值小于第二预设增益值。The method of claim 2, wherein the first preset calibration parameter value comprises a first preset gain value and a first preset offset value, and the second preset calibration parameter value comprises a second preset gain And a second preset offset value, the first preset gain value being smaller than the second preset gain value.
  6. 根据权利要求1所述的方法，其中所述在检测到校准参数获取触发事件时，基于预设判定方法判定指纹传感器表面是否有液体包括：The method according to claim 1, wherein when the calibration parameter acquisition trigger event is detected, determining whether the fingerprint sensor surface has a liquid based on the preset determination method comprises:
    在检测到校准参数获取触发事件时，获取指纹传感器的当前电容值；Obtaining a current capacitance value of the fingerprint sensor when the calibration parameter acquisition trigger event is detected;
    计算所述当前电容值和预设电容基准值的差值；Calculating a difference between the current capacitance value and a preset capacitance reference value;
    若所述差值在预设阈值内，则判定所述指纹传感器表面有液体，否则判定所述指纹传感器表面没有液体。If the difference is within a preset threshold, it is determined that there is liquid on the surface of the fingerprint sensor, otherwise it is determined that there is no liquid on the surface of the fingerprint sensor.
  7. 根据权利要求4所述的方法，其中所述控制指纹传感器升温包括：The method of claim 4 wherein said controlling the temperature of the fingerprint sensor comprises:
    增大所述指纹传感器的功率，以使所述指纹传感器升温；或者Increasing the power of the fingerprint sensor to warm the fingerprint sensor; or
    控制所述指纹传感器对应的加热器件对所述指纹传感器进行加热，以使所述指纹传感器升温。The heating device corresponding to the fingerprint sensor is controlled to heat the fingerprint sensor to heat the fingerprint sensor.
  8. 一种指纹传感器的校准参数的获取装置，其中包括：A device for acquiring calibration parameters of a fingerprint sensor, comprising:
    判定模块，用于在检测到校准参数获取触发事件时，基于预设判定方法判定指纹传感器表面是否有液体；a determining module, configured to determine, according to a preset determination method, whether there is liquid on the surface of the fingerprint sensor when the calibration parameter acquisition trigger event is detected;
    校准参数值确定模块，用于根据判定结果确定对应的预设校准参数值，以支持根据所述预设校准参数值进行指纹图像的抓取。The calibration parameter value determining module is configured to determine a corresponding preset calibration parameter value according to the determination result, to support the capturing of the fingerprint image according to the preset calibration parameter value.
  9. 根据权利要求8所述的装置，其中所述校准参数值确定模块具体用于：The apparatus according to claim 8, wherein said calibration parameter value determining module is specifically configured to:
    在所述指纹传感器表面没有液体时，确定对应的预设校准参数值为第一预设校准参数值，以支持根据所述第一预设校准参数值进行指纹图像的抓取；When there is no liquid on the surface of the fingerprint sensor, determining that the corresponding preset calibration parameter value is a first preset calibration parameter value, to support the capture of the fingerprint image according to the first preset calibration parameter value;
    在所述指纹传感器表面有液体时，确定对应的预设校准参数值为第二预设校准参数值，以支持根据所述第二预设校准参数值进行指纹图像的抓取。When there is liquid on the surface of the fingerprint sensor, determining that the corresponding preset calibration parameter value is a second preset calibration parameter value, to support the capture of the fingerprint image according to the second preset calibration parameter value.
  10. 根据权利要求9所述的装置，其中所述校准参数值确定模块具体用于：The apparatus according to claim 9, wherein said calibration parameter value determining module is specifically configured to:
    在所述指纹传感器表面有液体时，获取所述指纹传感器表面的湿度等级；Obtaining a humidity level of the surface of the fingerprint sensor when there is liquid on the surface of the fingerprint sensor;
    获取所述湿度等级对应的预设校准参数值；Obtaining a preset calibration parameter value corresponding to the humidity level;
    将所述预设校准参数值设置为第二预设校准参数值，以支持根据所述第二预设校准参数值进行指纹图像的抓取。Setting the preset calibration parameter value to a second preset calibration parameter value to support capturing of the fingerprint image according to the second preset calibration parameter value.
  11. 根据权利要求8所述的装置，其中所述校准参数值确定模块包括：The apparatus of claim 8 wherein said calibration parameter value determination module comprises:
    第一校准参数值确定单元，用于在所述指纹传感器表面没有液体时，确定对应的预设校准参数值为第一预设校准参数值，以支持根据所述第一预设校准参数值进行指纹图像的抓取；a first calibration parameter value determining unit, configured to determine, when the fingerprint sensor surface has no liquid, a corresponding preset calibration parameter value as a first preset calibration parameter value, to support performing according to the first preset calibration parameter value Grasping of fingerprint images;
    指纹传感器升温单元，用于在所述指纹传感器表面有液体时，控制指纹传感器升温，以去除所述指纹传感器表面的液体；a fingerprint sensor temperature increasing unit, configured to control temperature rise of the fingerprint sensor to remove liquid on the surface of the fingerprint sensor when there is liquid on the surface of the fingerprint sensor;
    第二校准参数值确定单元，用于确定对应的预设校准参数值为第一预设校准参数值，以支持根据所述第一预设校准参数值进行指纹图像的抓取。The second calibration parameter value determining unit is configured to determine that the corresponding preset calibration parameter value is the first preset calibration parameter value, to support the capturing of the fingerprint image according to the first preset calibration parameter value.
  12. 根据权利要求9所述的装置，其中所述第一预设校准参数值包括第一预设增益值和第一预设偏移值，所述第二预设校准参数值包括第二预设增益值和第二预设偏移值，所述第一预设增益值小于第二预设增益值。The apparatus according to claim 9, wherein the first preset calibration parameter value comprises a first preset gain value and a first preset offset value, and the second preset calibration parameter value comprises a second preset gain And a second preset offset value, the first preset gain value being smaller than the second preset gain value.
  13. 根据权利要求8所述的装置，其中所述判定模块具体用于：The apparatus of claim 8 wherein said determining module is specifically for:
    在检测到校准参数获取触发事件时，获取指纹传感器的当前电容值；Obtaining a current capacitance value of the fingerprint sensor when the calibration parameter acquisition trigger event is detected;
    计算所述当前电容值和预设电容基准值的差值；Calculating a difference between the current capacitance value and a preset capacitance reference value;
    若所述差值在预设阈值内，则判定所述指纹传感器表面有液体，否则判定所述指纹传感器表面没有液体。If the difference is within a preset threshold, it is determined that there is liquid on the surface of the fingerprint sensor, otherwise it is determined that there is no liquid on the surface of the fingerprint sensor.
  14. 根据权利要求11所述的置，其中所述指纹传感器升温单元具体用于：The device according to claim 11, wherein the fingerprint sensor temperature increasing unit is specifically configured to:
    在所述指纹传感器表面有液体时，增大所述指纹传感器的功率，以使所述指纹传感器升温；或者，在所述指纹传感器表面有液体时，控制所述指纹传感器对应的加热器件对所述指纹传感器进行加热，以使所述指纹传感器升温。When the surface of the fingerprint sensor has a liquid, increase the power of the fingerprint sensor to heat the fingerprint sensor; or, when there is liquid on the surface of the fingerprint sensor, control a heating device corresponding to the fingerprint sensor. The fingerprint sensor is heated to warm the fingerprint sensor.
  15. 一种移动终端，其中包括指纹传感器，及与所述指纹传感器连接的指纹传感器的校准参数的获取装置，所述指纹传感器的校准参数的获取装置包括：A mobile terminal, comprising a fingerprint sensor, and a acquiring device of a calibration parameter of a fingerprint sensor connected to the fingerprint sensor, wherein the acquiring device of the calibration parameter of the fingerprint sensor comprises:
    判定模块，用于在检测到校准参数获取触发事件时，基于预设判定方法判定指纹传感器表面是否有液体；a determining module, configured to determine, according to a preset determination method, whether there is liquid on the surface of the fingerprint sensor when the calibration parameter acquisition trigger event is detected;
    校准参数值确定模块，用于根据判定结果确定对应的预设校准参数值，以支持根据所述预设校准参数值进行指纹图像的抓取。The calibration parameter value determining module is configured to determine a corresponding preset calibration parameter value according to the determination result, to support the capturing of the fingerprint image according to the preset calibration parameter value.
  16. 根据权利要求15所述的移动终端，其中所述校准参数值确定模块具体用于：The mobile terminal of claim 15, wherein the calibration parameter value determining module is specifically configured to:
    在所述指纹传感器表面没有液体时，确定对应的预设校准参数值为第一预设校准参数值，以支持根据所述第一预设校准参数值进行指纹图像的抓取；When there is no liquid on the surface of the fingerprint sensor, determining that the corresponding preset calibration parameter value is a first preset calibration parameter value, to support the capture of the fingerprint image according to the first preset calibration parameter value;
    在所述指纹传感器表面有液体时，确定对应的预设校准参数值为第二预设校准参数值，以支持根据所述第二预设校准参数值进行指纹图像的抓取。When there is liquid on the surface of the fingerprint sensor, determining that the corresponding preset calibration parameter value is a second preset calibration parameter value, to support the capture of the fingerprint image according to the second preset calibration parameter value.
  17. 根据权利要求16所述的移动终端，其中所述校准参数值确定模块具体用于：The mobile terminal of claim 16, wherein the calibration parameter value determining module is specifically configured to:
    在所述指纹传感器表面有液体时，获取所述指纹传感器表面的湿度等级；Obtaining a humidity level of the surface of the fingerprint sensor when there is liquid on the surface of the fingerprint sensor;
    获取所述湿度等级对应的预设校准参数值；Obtaining a preset calibration parameter value corresponding to the humidity level;
    将所述预设校准参数值设置为第二预设校准参数值，以支持根据所述第二预设校准参数值进行指纹图像的抓取。Setting the preset calibration parameter value to a second preset calibration parameter value to support capturing of the fingerprint image according to the second preset calibration parameter value.
  18. 根据权利要求15所述的移动终端，其中所述校准参数值确定模块包括：The mobile terminal of claim 15, wherein the calibration parameter value determining module comprises:
    第一校准参数值确定单元，用于在所述指纹传感器表面没有液体时，确定对应的预设校准参数值为第一预设校准参数值，以支持根据所述第一预设校准参数值进行指纹图像的抓取；a first calibration parameter value determining unit, configured to determine, when the fingerprint sensor surface has no liquid, a corresponding preset calibration parameter value as a first preset calibration parameter value, to support performing according to the first preset calibration parameter value Grasping of fingerprint images;
    指纹传感器升温单元，用于在所述指纹传感器表面有液体时，控制指纹传感器升温，以去除所述指纹传感器表面的液体；a fingerprint sensor temperature increasing unit, configured to control temperature rise of the fingerprint sensor to remove liquid on the surface of the fingerprint sensor when there is liquid on the surface of the fingerprint sensor;
    第二校准参数值确定单元，用于确定对应的预设校准参数值为第一预设校准参数值，以支持根据所述第一预设校准参数值进行指纹图像的抓取。The second calibration parameter value determining unit is configured to determine that the corresponding preset calibration parameter value is the first preset calibration parameter value, to support the capturing of the fingerprint image according to the first preset calibration parameter value.
  19. 根据权利要求16所述的移动终端，其中所述第一预设校准参数值包括第一预设增益值和第一预设偏移值，所述第二预设校准参数值包括第二预设增益值和第二预设偏移值，所述第一预设增益值小于第二预设增益值。The mobile terminal of claim 16, wherein the first preset calibration parameter value comprises a first preset gain value and a first preset offset value, and the second preset calibration parameter value comprises a second preset a gain value and a second preset offset value, the first preset gain value being less than the second preset gain value.
  20. 根据权利要求15所述的移动终端，其中所述判定模块具体用于：The mobile terminal of claim 15, wherein the determining module is specifically configured to:
    在检测到校准参数获取触发事件时，获取指纹传感器的当前电容值；Obtaining a current capacitance value of the fingerprint sensor when the calibration parameter acquisition trigger event is detected;
    计算所述当前电容值和预设电容基准值的差值；Calculating a difference between the current capacitance value and a preset capacitance reference value;
    若所述差值在预设阈值内，则判定所述指纹传感器表面有液体，否则判定所述指纹传感器表面没有液体。If the difference is within a preset threshold, it is determined that there is liquid on the surface of the fingerprint sensor, otherwise it is determined that there is no liquid on the surface of the fingerprint sensor.
PCT/CN2016/091803 2015-10-19 2016-07-26 Method and apparatus for acquiring fingerprint sensor calibration parameters, and mobile terminal WO2017067259A1 (en)

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