WO2017067281A1 - Procédé et dispositif d'étalonnage pour capteur d'empreintes digitales et terminal - Google Patents

Procédé et dispositif d'étalonnage pour capteur d'empreintes digitales et terminal Download PDF

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Publication number
WO2017067281A1
WO2017067281A1 PCT/CN2016/093740 CN2016093740W WO2017067281A1 WO 2017067281 A1 WO2017067281 A1 WO 2017067281A1 CN 2016093740 W CN2016093740 W CN 2016093740W WO 2017067281 A1 WO2017067281 A1 WO 2017067281A1
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WO
WIPO (PCT)
Prior art keywords
fingerprint sensor
calibration
calibration data
storage unit
event
Prior art date
Application number
PCT/CN2016/093740
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English (en)
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
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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 WO2017067281A1 publication Critical patent/WO2017067281A1/fr

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Classifications

    • 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
    • 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
    • G06V40/50—Maintenance of biometric data or enrolment thereof

Definitions

  • Embodiments of the present invention relate to the field of intelligent terminal technologies, and in particular, to a calibration method, device, and terminal for a fingerprint sensor.
  • Fingerprint is the texture formed by uneven skin on the surface of the finger.
  • the texture feature of the fingerprint is unique and stable, so it is often used as the basis for identification.
  • a fingerprint sensor is a sensor that uses fingerprints to identify an identity.
  • fingerprint sensors are applied to smart terminals. As a very important auxiliary device, the user experience can be improved. However, each time the fingerprint sensor is initialized, the fingerprint array of the fingerprint sensor needs to be calibrated. The calibration of the fingerprint sensor takes a long time, which greatly reduces the initialization speed of the fingerprint sensor and adversely affects the performance of the fingerprint sensor. .
  • the fingerprint dot matrix of the fingerprint sensor needs to be calibrated.
  • the calibration of the fingerprint sensor takes a long time, which greatly reduces the initialization speed of the fingerprint sensor and adversely affects the performance of the fingerprint sensor.
  • the invention provides a calibration method, device and terminal for a fingerprint sensor to improve the initialization speed of the fingerprint sensor.
  • an embodiment of the present invention provides a method for calibrating a fingerprint sensor, including:
  • the fingerprint sensor in the smart terminal is calibrated, and the calibration data of the fingerprint sensor obtained by the calibration is stored;
  • the fingerprint sensor is initially set using the calibration data of the stored fingerprint sensor.
  • an embodiment of the present invention provides a calibration device for a fingerprint sensor, including:
  • a sensor calibration unit for monitoring a fingerprint sensor in the smart terminal when monitoring a preset fingerprint sensor calibration event
  • a calibration data storage unit configured to store calibration data of the fingerprint sensor obtained by calibration
  • the sensor initializing unit is configured to monitor the fingerprint sensor initialization event, and when the calibration data of the fingerprint sensor is stored in the smart terminal, the fingerprint sensor is initialized by using the stored calibration data of the fingerprint sensor.
  • an embodiment of the present invention provides a terminal, where the terminal includes: a memory and a processor, where the memory and the processor are connected by using a bus;
  • the memory is configured to store a set of program codes
  • the processor is configured to invoke program code stored in the memory to perform the following steps:
  • the fingerprint sensor in the smart terminal is calibrated, and the calibration data of the fingerprint sensor obtained by the calibration is stored;
  • the fingerprint sensor is initially set using the calibration data of the stored fingerprint sensor.
  • an embodiment of the present invention provides a computer storage medium, where the program is stored in a computer storage medium, and the program is used to execute part or all of the method described in any one of the first aspects of the embodiments of the present invention. step.
  • the invention provides a calibration method, device and terminal for a fingerprint sensor to improve the initialization speed of the fingerprint sensor.
  • FIG. 1 is a schematic flow chart of a calibration method of a fingerprint sensor according to Embodiment 1 of the present invention
  • FIG. 2 is a schematic flow chart of a calibration method of a fingerprint sensor according to Embodiment 2 of the present invention
  • FIG. 3 is a schematic flow chart of a calibration method of a fingerprint sensor according to Embodiment 3 of the present invention.
  • FIG. 4 is a schematic structural diagram of a calibration apparatus for a fingerprint sensor according to Embodiment 4 of the present invention.
  • FIG. 5 is a schematic structural diagram of a terminal according to Embodiment 5 of the present invention.
  • an embodiment of the present invention provides a method for calibrating a fingerprint sensor, including:
  • the fingerprint sensor in the smart terminal is calibrated, and the calibration data of the fingerprint sensor obtained by the calibration is stored;
  • the fingerprint sensor is initially set using the calibration data of the stored fingerprint sensor.
  • the storing calibration data of the fingerprint sensor obtained by the calibration includes:
  • the calibration data storage unit is a non-erasable storage unit
  • the smart terminal is detected to be powered on for the first time.
  • the fingerprint sensor calibration event is generated.
  • the calibration data storage unit is an erasable storage unit, and the calibration data storage unit is monitored The fingerprint sensor calibration event is generated when there is no calibration data.
  • the calibrating the fingerprint sensor includes:
  • the fingerprint sensor is calibrated using a preset fingerprint sensor calibration function.
  • an embodiment of the present invention provides a calibration device for a fingerprint sensor, including:
  • a sensor calibration unit for monitoring a fingerprint sensor in the smart terminal when monitoring a preset fingerprint sensor calibration event
  • a calibration data storage unit configured to store calibration data of the fingerprint sensor obtained by calibration
  • the sensor initializing unit is configured to monitor the fingerprint sensor initialization event, and when the calibration data of the fingerprint sensor is stored in the smart terminal, the fingerprint sensor is initialized by using the stored calibration data of the fingerprint sensor.
  • the calibration data storage unit is specifically configured to:
  • the method further includes:
  • the first calibration event unit is configured to be the non-erasable storage unit in the calibration data storage unit, and generate the fingerprint sensor calibration event when the smart terminal is detected to be powered on for the first time.
  • the method further includes:
  • a second calibration event unit wherein the calibration data storage unit is an erasable storage unit, and the fingerprint sensor calibration event is generated when no calibration data is detected in the calibration data storage unit.
  • the sensor calibration unit is specifically configured to:
  • the fingerprint sensor is calibrated using a preset fingerprint sensor calibration function.
  • an embodiment of the present invention provides a terminal, where the terminal includes: a memory and a processor, where the memory and the processor are connected by using a bus;
  • the memory is configured to store a set of program codes
  • the processor is configured to invoke program code stored in the memory to perform the following steps:
  • the fingerprint sensor in the smart terminal is calibrated, and the calibration data of the fingerprint sensor obtained by the calibration is stored;
  • the fingerprint sensor is initially set using the calibration data of the stored fingerprint sensor.
  • the processor is configured to store the calibration data of the fingerprint sensor obtained by the calibration, including:
  • the processor is configured to:
  • the calibration data storage unit is a non-erasable storage unit, and the fingerprint sensor calibration event is generated when the smart terminal is detected to be powered on for the first time.
  • the processor is configured to:
  • the calibration data storage unit is an erasable storage unit, and the fingerprint sensor calibration event is generated when no calibration data is detected in the calibration data storage unit.
  • the processor is configured to perform calibration on the fingerprint sensor, including:
  • the fingerprint sensor is calibrated using a preset fingerprint sensor calibration function.
  • an embodiment of the present invention provides a computer storage medium, where the program is stored in a computer storage medium, and the program includes the following steps when executed:
  • the fingerprint sensor in the smart terminal is calibrated, and the calibration data of the fingerprint sensor obtained by the calibration is stored;
  • the fingerprint sensor is initially set using the calibration data of the stored fingerprint sensor.
  • the program execution includes the following steps in storing the calibration data of the fingerprint sensor obtained by the calibration:
  • the executing the program includes the following steps:
  • the calibration data storage unit is a non-erasable storage unit, and the fingerprint sensor calibration event is generated when the smart terminal is detected to be powered on for the first time.
  • the executing the program includes the following steps:
  • the calibration data storage unit is an erasable storage unit, and the fingerprint sensor calibration event is generated when no calibration data is detected in the calibration data storage unit.
  • the performing when performing the calibration on the fingerprint sensor, includes:
  • the fingerprint sensor is calibrated using a preset fingerprint sensor calibration function.
  • FIG. 1 is a schematic flow chart of a calibration method of a fingerprint sensor according to Embodiment 1 of the present invention.
  • the method can be performed by a calibration device of a fingerprint sensor, wherein the device can be implemented by software and/or hardware, can be built in the smart terminal as part of the smart terminal, and the smart terminal can be an electronic device such as a smart phone or a tablet computer. terminal.
  • the implementation process includes:
  • Step 11 When the preset fingerprint sensor calibration event is detected, the fingerprint sensor in the smart terminal is calibrated, and the calibration data of the fingerprint sensor obtained by the calibration is stored.
  • the fingerprint sensor includes a fingerprint sensing chip and a protective cover fixed to the surface of the fingerprint sensing chip by an adhesive, and the protective cover is used to protect the fingerprint sensing chip.
  • the fingerprint sensing chip has a plurality of sensing units (Pixels), and the plurality of sensing units are arranged in a matrix.
  • the sensing unit is configured to sense the fingerprint signal and output the data, and the fingerprint signal is the depth information of the fingerprint texture.
  • the surface of the protective cover serves as a sensing surface of the fingerprint sensor. When the finger presses the sensing surface, the matrix composed of the depth information of the fingerprint texture output by all the sensing units is the texture information of the finger.
  • the difference in the different sensing units in the same fingerprint sensor, together with the unevenness of the adhesive and its impurities, the flatness of the protective cover, etc., may result in uneven response between the sensing units. Therefore, the accurate fingerprint texture feature cannot be directly obtained through the data output by the fingerprint sensor.
  • the fingerprint sensor must be calibrated, and the fingerprint sensor is initialized by using the calibration data obtained by calibration to eliminate the unevenness.
  • the fingerprint sensor may be a semiconductor capacitive sensor, an optical fingerprint sensor, a semiconductor thermal sensor, a semiconductor pressure sensor, an ultrasonic sensor, or a radio frequency (Radio) Frequency, RF) sensors, etc.
  • the fingerprint sensor calibration event may be generated when the user triggers the calibration button of the preset fingerprint sensor.
  • the smart terminal calibrates the fingerprint sensor and stores calibration data of the calibrated fingerprint sensor.
  • the calibration data may be a capacitance parameter, such as a charge value of the capacitor.
  • Step 12 When the fingerprint sensor initialization event is detected, and the calibration data of the fingerprint sensor is stored in the smart terminal, the fingerprint sensor is initialized and set using the calibration data of the stored fingerprint sensor.
  • the fingerprint sensor initialization event when the fingerprint sensor initialization event is detected, it is determined whether the calibration data of the fingerprint sensor is stored in the smart terminal. If yes, the fingerprint sensor is initialized by using the calibration data of the stored fingerprint sensor, and the fingerprint sensor is no longer needed to be calibrated. Compared to the prior art, the fingerprint is required every time the fingerprint sensor is initialized. The sensor performs a calibration to improve the initialization speed of the fingerprint sensor.
  • the calibration method of the fingerprint sensor provided by the embodiment of the invention is configured to initialize the fingerprint sensor by using the calibration data of the stored fingerprint sensor when the fingerprint sensor initialization event is detected and the calibration data of the fingerprint sensor is stored in the smart terminal, thereby avoiding The fingerprint sensor is calibrated each time the fingerprint sensor is initialized, which improves the initialization speed of the fingerprint sensor.
  • the present embodiment provides a new calibration method for the fingerprint sensor based on the first embodiment.
  • the calibration data of the fingerprint sensor obtained by the calibration may further include: obtaining the fingerprint obtained by the calibration.
  • the calibration data of the sensor is stored and the calibration data obtained by the calibration is stored in a preset calibration data storage unit.
  • FIG. 2 is a schematic flow chart of a calibration method of a fingerprint sensor according to Embodiment 2 of the present invention. As shown in FIG. 2, the implementation process may specifically include:
  • Step 21 When the preset fingerprint sensor calibration event is detected, the fingerprint sensor in the smart terminal is calibrated.
  • Step 22 Obtain calibration data of the fingerprint sensor obtained by calibration, and store the calibration data obtained by the calibration into a preset calibration data storage unit.
  • the calibration data storage unit may be a non-erasable storage unit such as a storage unit in a non-volatile memory, or may be an erasable storage unit such as a memory.
  • the fingerprint sensor calibration event may be generated when the smart terminal is detected to be powered on for the first time.
  • the fingerprint sensor calibration event may be generated when monitoring that there is no calibration data in the calibration data storage unit, that is, the calibration data storage unit is an erasable storage unit.
  • a fingerprint sensor calibration event is also generated when the calibration data is erased.
  • Step 23 When the fingerprint sensor initialization event is detected, and the calibration data of the fingerprint sensor is stored in the smart terminal, the fingerprint sensor is initially set by using the stored calibration data of the fingerprint sensor.
  • the fingerprint sensor initialization event when the fingerprint sensor initialization event is detected, it is determined whether the calibration data of the fingerprint sensor is stored in the smart terminal, and if so, the fingerprint sensor is initialized by using the calibration data of the stored fingerprint sensor, and It is no longer necessary to re-calibrate the fingerprint sensor, which improves the initialization speed of the fingerprint sensor; if not, it generates a fingerprint sensor calibration event, calibrates the fingerprint sensor, and initializes the fingerprint sensor with the calibration data of the fingerprint sensor obtained by calibration That is, the fingerprint sensor does not need to be calibrated each time the fingerprint sensor is initialized.
  • the calibration method of the fingerprint sensor when monitoring a preset fingerprint sensor calibration event, calibrating the fingerprint sensor to obtain calibration data of the fingerprint sensor, and the calibration data of the fingerprint sensor can be stored in the erasable storage unit. It can also be stored in a non-erasable memory unit.
  • the fingerprint sensor initialization event is detected and the calibration data of the fingerprint sensor is stored in the smart terminal, the fingerprint sensor is initialized by using the stored calibration data of the fingerprint sensor, thereby improving the initialization speed of the fingerprint sensor.
  • This embodiment provides a new method for calibrating a fingerprint sensor based on the foregoing embodiment.
  • the fingerprint sensor is calibrated, and the method further includes: performing the fingerprint sensor by using a preset fingerprint sensor calibration function. calibration.
  • FIG. 3 is a schematic flow chart of a calibration method of a fingerprint sensor according to Embodiment 3 of the present invention. As shown in FIG. 3, the implementation process may specifically include:
  • Step 31 When the preset fingerprint sensor calibration event is detected, the fingerprint sensor is calibrated by using a preset fingerprint sensor calibration function.
  • the fingerprint sensor calibration function includes, but is not limited to, calculation by a neural network, data statistics, curve fitting, mathematical model, etc., for example, the calibration function may be a linear function.
  • the calibration function is only related to the hardware structure of the fingerprint sensor, and is independent of the user behavior.
  • the fingerprint sensor is calibrated by using the calibration function, the user's finger is not required to contact the sensing surface of the plurality of sensing units for finger contact. .
  • Step 32 Store calibration data of the fingerprint sensor obtained by calibration.
  • the calibration data of the fingerprint sensor may be stored in an erasable storage unit or a non-erasable storage unit of the smart terminal.
  • Step 33 When the fingerprint sensor initialization event is detected, and the calibration data of the fingerprint sensor is stored in the smart terminal, the fingerprint sensor is initially set by using the stored calibration data of the fingerprint sensor.
  • the calibration method of the fingerprint sensor provided by the embodiment of the present invention, when the preset fingerprint sensor calibration event is detected, the fingerprint sensor is calibrated by using a preset fingerprint sensor calibration function to obtain calibration data of the fingerprint sensor, and then the fingerprint is monitored.
  • the fingerprint sensor can be initialized by using the previously stored calibration data, except that the previously stored calibration data is deleted, without having to recalibrate the fingerprint sensor during initialization, thereby improving the initialization speed of the fingerprint sensor.
  • FIG. 4 is a schematic structural diagram of a calibration apparatus for a fingerprint sensor according to Embodiment 4 of the present invention.
  • the device may be built in the smart terminal, wherein the smart terminal may be an electronic terminal such as a smart phone or a tablet.
  • the specific structure of the calibration device of the fingerprint sensor can be as follows:
  • the sensor calibration unit 41 is configured to monitor the fingerprint sensor in the smart terminal when the preset fingerprint sensor calibration event is detected;
  • a calibration data storage unit 42 for storing calibration data of the fingerprint sensor obtained by calibration
  • the sensor initializing unit 43 is configured to monitor the fingerprint sensor initialization event, and when the calibration data of the fingerprint sensor is stored in the smart terminal, initialize the setting of the fingerprint sensor by using the stored calibration data of the fingerprint sensor.
  • the calibration data storage unit 42 may be specifically configured to:
  • the calibration device of the fingerprint sensor may further include:
  • the first calibration event unit is configured to be the non-erasable storage unit in the calibration data storage unit, and generate the fingerprint sensor calibration event when the smart terminal is detected to be powered on for the first time.
  • the calibration device of the fingerprint sensor may further include:
  • a second calibration event unit wherein the calibration data storage unit is an erasable storage unit, and the fingerprint sensor calibration event is generated when no calibration data is detected in the calibration data storage unit.
  • the sensor calibration unit 41 may specifically be used to:
  • the fingerprint sensor is calibrated using a preset fingerprint sensor calibration function.
  • FIG. 5 is a schematic structural diagram of a terminal according to Embodiment 5 of the present invention.
  • the terminal described in this embodiment includes: at least one input device 100; at least one output device 200; at least one processor 300 and a memory 400.
  • the processor 300 can be a central processing unit (CPU, Central) Processing Unit).
  • the input device 100, the output device 200, the processor 300, and the memory 400 described above are connected by a bus 500.
  • the input device 100 may specifically be a touch panel, a physical button, or the like.
  • the output device 200 described above may specifically be a display screen.
  • the above memory 400 may be a high speed RAM memory or a non-volatile memory (non-volatile memory). Memory), such as disk storage.
  • the memory 400 is used to store a set of program codes, and the processor 300 is used to call the program code stored in the memory 400 to perform the following operations:
  • the fingerprint sensor in the smart terminal is calibrated, and the calibration data of the fingerprint sensor obtained by the calibration is stored;
  • the fingerprint sensor is initially set using the calibration data of the stored fingerprint sensor.
  • the processor 300 is configured to store calibration data of the fingerprint sensor obtained by the calibration, including:
  • the processor 300 is configured to:
  • the calibration data storage unit is a non-erasable storage unit, and the fingerprint sensor calibration event is generated when the smart terminal is detected to be powered on for the first time.
  • the processor 300 is configured to:
  • the calibration data storage unit is an erasable storage unit, and the fingerprint sensor calibration event is generated when no calibration data is detected in the calibration data storage unit.
  • the processor 300 is configured to calibrate the fingerprint sensor, including:
  • the fingerprint sensor is calibrated using a preset fingerprint sensor calibration function.
  • the processor 300 described in the embodiment of the present invention may implement the implementation manner described in the calibration method of the fingerprint sensor provided by the first to third embodiments of the present invention, and may also perform the present invention.
  • the implementation described in the calibration apparatus of the fingerprint sensor provided by the fourth embodiment is not described herein again.
  • the embodiment of the present invention further provides a computer storage medium, wherein the computer storage medium can store a program, and the program includes some or all of the steps of the calibration method of any one of the fingerprint sensors described in the foregoing method embodiments.
  • the computer program can be stored in a computer readable storage medium, such as in a memory of the terminal, and executed by at least one processor within the terminal, and can include, as described, the fingerprint sensor
  • the storage medium may be a magnetic disk, an optical disk, a read only memory (ROM, Read) Only Memory), random access memory (RAM, Random Access Memory), etc.
  • each functional unit may be integrated into one processing chip, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • the above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.
  • the integrated unit if implemented in the form of a software functional unit and sold or used as a standalone product, may also be stored in a computer readable storage medium, such as a read only memory, a magnetic disk or an optical disk, etc. .
  • the calibration method of the fingerprint sensor provided in this embodiment is the same as the calibration method of the fingerprint sensor provided by any embodiment of the present invention, and the calibration method of the fingerprint sensor provided by any embodiment of the present invention may be performed, and the method for performing the corresponding method is provided.
  • Functional modules and benefits Reference may be made to the calibration method of the fingerprint sensor provided by any embodiment of the present invention, which is not described in detail in this embodiment.

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  • Human Computer Interaction (AREA)
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Abstract

L'invention concerne un procédé d'étalonnage pour un capteur d'empreintes digitales, comprenant les étapes consistant à : lorsqu'un événement d'étalonnage est détecté, étalonner un capteur d'empreintes digitales, et stocker des données d'étalonnage du capteur d'empreintes digitales produites par l'étalonnage ; et, lorsqu'un événement de démarrage de capteur d'empreintes digitales est détecté et que les données d'étalonnage du capteur d'empreintes digitales sont stockées dans un terminal intelligent, utiliser les données d'étalonnage stockées du capteur d'empreintes digitales pour démarrer le capteur d'empreintes digitales. En outre, l'invention concerne également un dispositif d'étalonnage pour le capteur d'empreintes digitales correspondant et un terminal.
PCT/CN2016/093740 2015-10-19 2016-08-05 Procédé et dispositif d'étalonnage pour capteur d'empreintes digitales et terminal WO2017067281A1 (fr)

Applications Claiming Priority (2)

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CN201510680015.1 2015-10-19
CN201510680015.1A CN105260721A (zh) 2015-10-19 2015-10-19 一种指纹传感器的校准方法及装置

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105260721A (zh) * 2015-10-19 2016-01-20 广东欧珀移动通信有限公司 一种指纹传感器的校准方法及装置
CN108573188B (zh) * 2017-03-07 2021-10-08 宏碁股份有限公司 指纹感测装置、电子装置以及指纹感测器的校准方法

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CN104700070A (zh) * 2015-01-13 2015-06-10 深圳市汇顶科技股份有限公司 指纹传感器及其校正方法
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US20100066697A1 (en) * 2007-03-14 2010-03-18 Axsionics Ag Pressure measurement device and corresponding method
CN103430032A (zh) * 2011-01-14 2013-12-04 赛普拉斯半导体公司 在触摸感应设备的初始化过程中的导电物体的探测
CN102735284A (zh) * 2012-06-25 2012-10-17 青岛海信移动通信技术股份有限公司 一种传感器校准方法及装置
EP2762877A1 (fr) * 2013-01-31 2014-08-06 Sensirion AG Étalonnage d'un capteur chimique dans un dispositif électronique portable
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