WO2020108225A1 - 指纹采集方法及相关装置 - Google Patents

指纹采集方法及相关装置 Download PDF

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Publication number
WO2020108225A1
WO2020108225A1 PCT/CN2019/114675 CN2019114675W WO2020108225A1 WO 2020108225 A1 WO2020108225 A1 WO 2020108225A1 CN 2019114675 W CN2019114675 W CN 2019114675W WO 2020108225 A1 WO2020108225 A1 WO 2020108225A1
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WIPO (PCT)
Prior art keywords
fingerprint image
fingerprint
brightness
image
target
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Application number
PCT/CN2019/114675
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English (en)
French (fr)
Inventor
袁石林
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Oppo广东移动通信有限公司
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Publication date
Application filed by Oppo广东移动通信有限公司 filed Critical Oppo广东移动通信有限公司
Publication of WO2020108225A1 publication Critical patent/WO2020108225A1/zh

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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
    • G06F21/30—Authentication, i.e. establishing the identity or authorisation of security principals
    • G06F21/31—User authentication
    • G06F21/32—User authentication using biometric data, e.g. fingerprints, iris scans or voiceprints
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/02—Constructional features of telephone sets
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/66—Substation equipment, e.g. for use by subscribers with means for preventing unauthorised or fraudulent calling
    • H04M1/667—Preventing unauthorised calls from a telephone set
    • H04M1/67—Preventing unauthorised calls from a telephone set by electronic means
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/72—Mobile telephones; Cordless telephones, i.e. devices for establishing wireless links to base stations without route selection
    • H04M1/725—Cordless telephones
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0626—Adjustment of display parameters for control of overall brightness

Definitions

  • This application relates to the technical field of intelligent mobile terminals, and in particular to a fingerprint collection method and related devices.
  • the smart electronic devices on the market basically support the touch screen operation function.
  • the user usually enters several sets of fingerprints into the terminal's database in advance.
  • the user can directly click the screen to operate and interact with the device.
  • Some smart terminals also have a fingerprint recognition function, which can be used to wake up to unlock, identity verification, etc.
  • the outside light can interfere with the fingerprint recognition function, which makes it impossible to quickly perform operations such as unlocking, which reduces the user experience.
  • Embodiments of the present application provide a fingerprint collection method and related device, which improve the accuracy and intelligence of fingerprint collection by electronic equipment.
  • an embodiment of the present application provides a fingerprint collection method, which is applied to an electronic device.
  • the preset area of the display screen of the electronic device is provided with an off-screen fingerprint module.
  • the method includes:
  • the brightness of the display screen is the first brightness
  • the brightness of the display screen is the second brightness
  • collect at least one second fingerprint image to obtain at least two fingerprint images
  • the first brightness is less than the second brightness
  • the target fingerprint image is determined according to the at least two fingerprint images.
  • an embodiment of the present application provides a fingerprint collection device, which is applied to an electronic device.
  • a preset area of a display screen of the electronic device is provided with an off-screen fingerprint module.
  • the fingerprint collection device includes a collection unit and a determination unit ,among them,
  • the collection unit is configured to collect at least one first fingerprint image when the brightness of the display screen is the first brightness, and collect at least one second fingerprint image when the brightness of the display screen is the second brightness To obtain at least two fingerprint images, the first brightness is less than the second brightness;
  • the determining unit is configured to determine a target fingerprint image based on the at least two fingerprint images.
  • an embodiment of the present application provides an electronic device, including a processor, a memory, a communication interface, and one or more programs, where the one or more programs are stored in the memory and configured to be processed by the above
  • the above program includes instructions for performing the steps in any method of the first aspect of the embodiments of the present application.
  • an embodiment of the present application provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program for electronic data exchange, wherein the computer program causes the computer to execute the first embodiment of the present application.
  • the computer program causes the computer to execute the first embodiment of the present application.
  • an embodiment of the present application provides a computer program product, wherein the computer program product includes a non-transitory computer-readable storage medium storing the computer program, and the computer program is operable to cause the computer to execute as implemented in the present application Examples of some or all of the steps described in any method of the first aspect.
  • the computer program product may be a software installation package.
  • the electronic device first collects at least one first fingerprint image when the brightness of the display screen is the first brightness, and collects at least one of the first fingerprint images when the brightness of the display screen is the second brightness
  • One second fingerprint image obtains at least two fingerprint images, the first brightness is less than the second brightness
  • the target fingerprint image is determined according to the at least two fingerprint images.
  • the electronic device of the embodiment of the present application can further adjust the brightness of different display screens to further collect fingerprint images under different brightnesses.
  • the present application can solve the problem of light interference and collect accurate fingerprints, thereby improving the unlock success rate To improve the accuracy and intelligence of fingerprint collection by electronic devices.
  • 1A is a schematic diagram of an electronic device for collecting fingerprints provided by an embodiment of the present application.
  • FIG. 1B is a schematic structural diagram of an electronic device provided by an embodiment of the present application.
  • FIG. 2 is a schematic flowchart of a fingerprint collection method provided by an embodiment of the present application.
  • FIG. 3 is a schematic flowchart of another fingerprint collection method provided by an embodiment of the present application.
  • FIG. 4 is a schematic flowchart of another fingerprint collection method provided by an embodiment of the present application.
  • FIG. 5 is a schematic structural diagram of an electronic device provided by an embodiment of the present application.
  • FIG. 6 is a block diagram of functional units of a fingerprint collection device provided by an embodiment of the present application.
  • the electronic device involved in the embodiments of the present application may be an electronic device with fingerprint recognition capability, and the electronic device may include various handheld devices with fingerprint recognition function, vehicle-mounted devices, wearable devices, computing devices, or those connected to a wireless modem Other processing equipment, as well as various forms of user equipment (User Equipment, UE), mobile station (Mobile Station, MS), terminal equipment (terminal), etc.
  • UE User Equipment
  • MS Mobile Station
  • terminal terminal
  • Fingerprint recognition technology maps a person to his fingerprint. By comparing his fingerprint with a pre-stored fingerprint and comparing the details of different fingerprints for identification, he can verify his true identity.
  • the fingerprint image is the data of the fingerprint as an image carrier.
  • Fingerprints are lines formed by uneven skin on the fingertips of human fingers. Fingerprints are the lines formed by the uneven skin on the fingertips of human fingers. Because human fingerprints are genetic and environmental, they are closely related to human health, so everyone has fingerprints, but they are different. The fingerprint repetition rate is extremely small, about 15 parts per billion, so it is called "human ID card”. Based on this feature of fingerprints, fingerprints are widely used as information for identity authentication. Fingerprint lines often have interruptions, bifurcations, or turning points.
  • Fingerprint recognition technology has the advantages of fast recognition, convenient collection and low price. It is widely used in many disciplines such as image processing, pattern recognition, computer vision and so on.
  • each set of fingerprints is a fingerprint corresponding to one finger of the user.
  • one set of fingerprints is the fingerprint of the user's index finger
  • the other set of fingerprints is the fingerprint of the user's thumb.
  • the system extracts information such as the feature points of the fingerprints and saves them as a feature point template corresponding to the fingerprints.
  • the user places the fingerprint on the fingerprint recognition device, so that the fingerprint recognition device recognizes the fingerprint input by the user, and then the terminal extracts the feature points of the fingerprint input by the user
  • Multiple sets of fingerprints pre-registered in the database are matched one by one.
  • the matching is successful, and the terminal allows corresponding operations to be performed. For example, for example, if the user needs to unlock the screen of the terminal, at this time, when the fingerprint input by the user matches successfully, the terminal unlocks the screen.
  • the fingerprint image acquisition equipment currently used is basically based on three technical foundations: optical technology, semiconductor silicon technology, and ultrasonic technology.
  • Collecting fingerprints with optical technology is the oldest and most widely used technology. Put the finger on the optical lens, and under the illumination of the built-in light source, the finger will project it on the charge-coupled device with a prism, thereby forming a ridge line (a line with a certain width and direction in the fingerprint image) that is black and valley line (line The concave part between the lines) is a white digitized multi-gray fingerprint image that can be processed by the fingerprint device algorithm.
  • the light-sensitive screen fingerprint recognition technology that is, the off-screen fingerprint recognition technology, is to place the recognition module under the mobile phone screen panel. During the recognition, the RGB light emitted by the module penetrates the panel to form a fingerprint light film at the fingertip, and then The collected fingerprint information is fed back to the identification module to complete the operation through system comparison. Exemplarily, as shown in FIG.
  • the electronic device is 101
  • the display screen is 102
  • the preset area for collecting fingerprints is 103
  • 104 is an enlarged view of the fingerprint
  • a schematic diagram of an electronic device 101 collecting fingerprints 104 when a finger touches the screen, the OLED
  • the light emitted by the screen penetrates the cover to illuminate the texture of the fingerprint, and the reflected light of the fingerprint penetrates the screen and returns to the sensor, and finally forms a fingerprint image for identification.
  • the preset area 103 of the display screen 102 of the electronic device 101 is provided with an under-screen fingerprint module 105.
  • the under-screen fingerprint module 105 is disposed below the preset area 103 of the display screen 102, as shown in FIG. 1B.
  • the scanner processor Before comparing fingerprints with stored data, the scanner processor must ensure that a clear image is obtained. It checks the average value of pixel darkness or the overall value of a small sample. If the overall image is too dark or too bright, the scan will be discarded. The scanner then adjusts the exposure time to allow more or less light to enter, and scans again. If the darkness is appropriate, the scanner system will continue to check the sharpness of the image (the sharpness of the fingerprint scan). The processor will view several straight lines moving in the vertical and horizontal directions on the image. If the line perpendicular to the ridge line is composed of very dark pixels and very bright pixels, it means that the fingerprint image has good clarity.
  • the fingerprint recognition system is a typical pattern recognition system, including fingerprint image acquisition, processing, feature extraction and comparison modules.
  • the touch screen includes a display screen and a touch panel (Touch Panel, TP), and the touch screen includes a fingerprint collection area.
  • the fingerprint collection area is an area in the touch screen, that is, a large area that can be pressed by multiple fingers at the same time, rather than a small area that can be pressed by a single finger.
  • the location of the fingerprint collection area may be the middle area of the touch screen, the upper area of the touch screen, the lower area of the touch screen, etc., which is not limited herein.
  • FIG. 2 is a schematic flowchart of a fingerprint collection method provided by an embodiment of the present application, which is applied to an electronic device.
  • the preset area of the display screen of the electronic device is provided with an off-screen fingerprint module;
  • the fingerprint collection method includes:
  • S201 Collect at least one first fingerprint image when the brightness of the display screen is the first brightness, and acquire at least two second fingerprint images when the brightness of the display screen is the second brightness to obtain at least two In the fingerprint image, the first brightness is less than the second brightness.
  • the first brightness may be 0% brightness of the display screen in the electronic device, that is, the current display screen is black
  • the second brightness may be 100% brightness of the display screen in the electronic device, that is, the current display screen is high Bright state, that is, the brightness of different display screens can be strong light mode, normal mode or black screen mode.
  • the electronic device activates the light sensor to read the light sensor value.
  • the light intensity is detected to be more than 50000lux, it enters the strong light mode-first, the brightness of the display under the finger is blackened, and the external light is used to penetrate One fingerprint image is set to A; next, the brightness of the display is highlighted, and then the second fingerprint image is collected, set to B, and BA to obtain the target fingerprint image, if the light perception is below 50000lux
  • the electronic device activates the light sensor to read the light sensor value.
  • the electronic device determines a target fingerprint image according to the at least two fingerprint images.
  • the preset area may be a lower or upper part of the display area of the display screen, which is determined according to the installation position of the fingerprint module under the screen.
  • the electronic device first collects at least one first fingerprint image when the brightness of the display screen is the first brightness, and collects at least one of the first fingerprint images when the brightness of the display screen is the second brightness
  • One second fingerprint image obtains at least two fingerprint images, the first brightness is less than the second brightness
  • the target fingerprint image is determined according to the at least two fingerprint images.
  • the electronic device according to the embodiment of the present application can adjust the brightness of different display screens and further collect fingerprint images under different brightnesses.
  • the present application can solve the problem of light interference and collect accurate fingerprints, thereby improving the unlock success rate. Improve the accuracy and intelligence of electronic devices for fingerprint collection.
  • the determining the target fingerprint image based on the at least two fingerprint images includes: scanning the at least one first fingerprint image and the at least one second fingerprint image to obtain image characteristics of each fingerprint image Value; compare each image feature value with a preset feature value, select a first target feature value and a second target feature value greater than the preset image feature value, the first target feature value is from the at least Selecting from a first fingerprint image, the second target feature value is selected from the at least one second fingerprint image; performing an image difference operation on the first target fingerprint image and the second target fingerprint image To get the target fingerprint image.
  • the preset characteristic value may be a characteristic value obtained by the electronic device analyzing the fingerprint template recorded on the electronic device by the user in advance.
  • the image difference operation is also called image subtraction operation, which refers to the process of subtracting images of the same scene taken at different times or images of the same scene in different wavebands to obtain an output image.
  • the electronic device can obtain the optimal fingerprint image from the multiple fingerprint images through their feature values to avoid blurring of the collected image.
  • the differential operation of the selected fingerprint image can solve the light interference Problem, getting accurate fingerprint images, which in turn improves the success rate of unlocking and improves the accuracy and intelligence of fingerprint collection by electronic devices.
  • the at least two fingerprint images include a first fingerprint image and a second fingerprint image
  • the determining the target fingerprint image based on the at least two fingerprint images includes: combining the first fingerprint image and the second fingerprint image
  • the second fingerprint image is subjected to image difference operation to obtain the target fingerprint image.
  • the first fingerprint image and the second fingerprint image are at the same position.
  • the electronic device adjusts the brightness value when collecting fingerprints according to the current ambient light brightness of the display screen, which is conducive to the collection of fingerprint information, and the fingerprint recognition speed is fast and accurate, and the effect of light interference is removed by differential operation. Improve the accuracy and efficiency of fingerprint information collection, user experience is better.
  • the under-screen fingerprint module is disposed below the preset area of the display screen.
  • the method further includes: determining a position of the first touch screen corresponding to the first fingerprint image and a second corresponding to the second fingerprint image Touch screen position; matching the first touch screen position and the second touch screen position to obtain a matching value; if the matching value is lower than a preset matching value, the first fingerprint image Calibrating with the second fingerprint image to obtain a calibrated reference first fingerprint image and reference second fingerprint image, the reference first fingerprint image and the reference second fingerprint image are used for the image difference operation.
  • the electronic device calculates through the relative difference of the charge at each corner, accurately locates the location where the touch event occurs, and transmits this information to the touch screen driver.
  • the touch screen position of the best fingerprint image is the preset area of the display screen.
  • the brightness of the preset area is increased to a brightness where fingerprint information can be collected clearly and accurately Threshold value for easy fingerprint collection.
  • the preset matching value is factory-defined at the factory.
  • the image correction refers to the restorative processing of the distorted image, according to the cause of the image distortion, establish a corresponding mathematical model, so that it can calculate the estimated value of the real image from the distorted image, so that it is based on the predetermined
  • the error criterion of the image is close to the real image to the greatest extent along the reverse process of distorting the image.
  • the electronic device needs to meet the prerequisites when performing image differential calculations.
  • the positions of the two collected images must be at the same corresponding position. If not, after the image calibration, the differential calculation is performed, which is conducive to fingerprints. The accuracy and intelligence of information collection.
  • the method further includes: collecting a light sensing value; detecting whether the light sensing value is greater than or Equal to the preset threshold;
  • the first fingerprint image is collected
  • the brightness of the display screen is the second brightness
  • at least one second fingerprint image is collected to obtain at least two
  • the fingerprint image, where the first brightness is less than the second brightness includes: if it is detected that the light perception value is greater than or equal to a preset threshold, collecting at least one first image when the brightness of the display screen is the first brightness
  • For the fingerprint image when the brightness of the display screen is the second brightness, at least one second fingerprint image is collected to obtain at least two fingerprint images.
  • the scene with the first brightness being 0 may refer to the scene where the display screen is turned off, or the scene where the backlight is turned off and the screen does not emit light at all, which is not limited here.
  • the electronic device first collects the fingerprint image in the specific case where the brightness of the first display screen is black, and then collects the fingerprint image under the brightness of the second display screen. Based on two different brightness characteristics, the electronic device improves Fingerprint collection accuracy and intelligence.
  • the method further includes: determining that the display screen is in an unlocked state; acquiring a trigger instruction; and starting the light sensor according to the trigger instruction.
  • the method further includes: if it is detected that the light-sensing value is less than the preset threshold, collecting at the second brightness The user fingerprint image to obtain the target fingerprint image.
  • the second brightness may be 100% brightness of the display screen in the electronic device, that is, the current display screen is in a bright state.
  • the electronic device adjusts the brightness value when collecting fingerprints according to the current ambient light brightness of the display screen, which is beneficial to the collection of fingerprint information, removes the influence of light interference, and improves the accuracy and efficiency of collecting fingerprint information.
  • the method further includes: matching the target fingerprint image with a preset fingerprint template to obtain a reference matching value; if the reference matching value If it is greater than or equal to the preset matching value, the identity lock is passed to remove the lock screen interface; or, if the reference matching value is less than the preset matching value, the target fingerprint image is obtained again.
  • the preset fingerprint template is a fingerprint template recorded by the user on the electronic device in advance.
  • the preset matching value may be the similarity of the image.
  • the electronic device matches the detected fingerprint information with the fingerprint information preset by the electronic device. For example, the user touches the display screen of the electronic device with the index finger. After the electronic device detects the fingerprint of the index finger, the detected index finger fingerprint is compared with the preset fingerprint information in the electronic device to obtain the highest matching degree among the preset fingerprint information. The matching degree of the fingerprint information. After passing the identity authentication, display the main interface or start some applications.
  • the electronic device matches the finally determined target fingerprint image with the fingerprint template, which improves the accuracy of identity authentication, guarantees the security of device information, and improves the accuracy and security of fingerprint setting by electronic devices .
  • the first brightness is 0.
  • the method further includes: determining that the display screen is in an unlocked state; acquiring a trigger instruction; and starting the light sensor according to the trigger instruction.
  • the electronic device before the electronic device turns on the light sensor, the electronic device is in an unlocked state, and when the trigger instruction is detected, the light sensor is controlled to start, and fingerprint information of the user's finger is collected.
  • the preset threshold may be 50000lux, 40000lux, etc., which is not limited here.
  • FIG. 3 is a schematic flowchart of a fingerprint collection method provided by an embodiment of the present application, which is applied to the electronic device shown in FIG. 1A.
  • the preset area of the display screen is provided with an under-screen fingerprint module.
  • the fingerprint collection method includes:
  • the electronic device turns on a light-sensitive sensor to collect light-sensitive values.
  • the electronic device detects whether the light sensing value is greater than or equal to a preset threshold.
  • the electronic device collects a first fingerprint image when the brightness of the display screen is the first brightness.
  • the electronic device collects a second fingerprint image when the brightness of the display screen is the second brightness.
  • the electronic device performs image difference operation on the first fingerprint image and the second fingerprint image to obtain a target fingerprint image.
  • the electronic device first collects at least one first fingerprint image when the brightness of the display screen is the first brightness, and collects at least one of the first fingerprint images when the brightness of the display screen is the second brightness
  • One second fingerprint image obtains at least two fingerprint images, the first brightness is less than the second brightness
  • the target fingerprint image is determined according to the at least two fingerprint images.
  • the electronic device according to the embodiment of the present application can adjust the brightness of different display screens and further collect fingerprint images under different brightnesses.
  • the present application can solve the problem of light interference and collect accurate fingerprints, thereby improving the unlock success rate. Improve the accuracy and intelligence of electronic devices for fingerprint collection.
  • the electronic device adjusts the brightness value when collecting fingerprints according to the current ambient light brightness of the display screen, which is conducive to the collection of fingerprint information.
  • the fingerprint recognition speed is fast and accurate, and the effect of light interference is removed through differential operations to improve the collection of fingerprint information Accuracy and efficiency, the user experience is better.
  • FIG. 4 is a schematic flow chart of a fingerprint collection method provided by an embodiment of the present application, which is applied to the electronic device shown in FIG. 1A.
  • the preset area of the display screen is provided with an under-screen fingerprint module.
  • the fingerprint collection method includes:
  • the electronic device turns on a light-sensitive sensor to collect light-sensitive values.
  • the electronic device detects whether the light sensing value is greater than or equal to a preset threshold.
  • the electronic device adjusts the brightness of the display screen to the second brightness.
  • the electronic device collects a fingerprint image of the user under the second brightness to obtain a target fingerprint image.
  • the electronic device matches the target fingerprint image with a preset fingerprint template to obtain a reference matching value.
  • the electronic device first collects at least one first fingerprint image when the brightness of the display screen is the first brightness, and collects at least one of the first fingerprint images when the brightness of the display screen is the second brightness
  • One second fingerprint image obtains at least two fingerprint images, the first brightness is less than the second brightness
  • the target fingerprint image is determined according to the at least two fingerprint images.
  • the electronic device of the embodiment of the present application can adjust the display screen to different brightnesses, and further collect fingerprint images under different brightnesses.
  • the present application can solve the problem of light interference and collect accurate fingerprints, thereby increasing the unlock success rate. Improve the accuracy and intelligence of electronic devices for fingerprint collection.
  • the electronic device adjusts the brightness value when collecting fingerprints according to the current ambient light brightness of the display screen, which is conducive to the collection of fingerprint information.
  • the fingerprint recognition speed is fast and accurate, and the effect of light interference is removed through differential operations to improve the collection of fingerprint information Accuracy and efficiency, the user experience is better.
  • the electronic device matches the finally determined target fingerprint image with the fingerprint template, which improves the accuracy of identity authentication, guarantees the security of device information, and improves the accuracy and security of fingerprint identification by electronic devices.
  • FIG. 5 is a schematic structural diagram of an electronic device 500 provided by an embodiment of the present application.
  • the electronic device 500 includes an application processor 510, a memory 520, a communication interface 530, and one or more programs 521, wherein the one or more programs 521 are stored in the above-mentioned memory 520 and are configured to be executed by the above-mentioned application processor 510,
  • the one or more programs 521 include instructions for performing the following steps;
  • the brightness of the display screen is the first brightness
  • the brightness of the display screen is the second brightness
  • collect at least one second fingerprint image to obtain at least two fingerprint images
  • the first brightness is less than the second brightness
  • the target fingerprint image is determined according to the at least two fingerprint images.
  • the electronic device first collects at least one first fingerprint image when the brightness of the display screen is the first brightness, and collects at least one of the first fingerprint images when the brightness of the display screen is the second brightness
  • One second fingerprint image obtains at least two fingerprint images, the first brightness is less than the second brightness
  • the target fingerprint image is determined according to the at least two fingerprint images.
  • the electronic device of the embodiment of the present application can adjust the brightness of different display screens and further collect fingerprint images under different brightnesses. The present application can solve the problem of light interference and collect accurate fingerprints, thereby improving the unlock success rate To improve the accuracy and intelligence of fingerprint collection by electronic devices.
  • the instructions in the program are specifically used to perform the following operations: scan the at least one first fingerprint image and the At least one second fingerprint image to obtain an image feature value of each fingerprint image; comparing each image feature value with a preset feature value, selecting a first target feature value and a second value greater than the preset image feature value Target feature value, the first target feature value is selected from the at least one first fingerprint image, the second target feature value is selected from the at least one second fingerprint image; An image difference operation is performed between a target fingerprint image and the second target fingerprint image to obtain a target fingerprint image.
  • the at least two fingerprint images include a first fingerprint image and a second fingerprint image.
  • the instructions in the program specifically use To perform the following operations: performing image difference operation on the first fingerprint image and the second fingerprint image to obtain a target fingerprint image.
  • the program before the determining the target fingerprint image based on the at least two fingerprint images, the program further includes instructions for performing the following operations: determining the first touch corresponding to the first fingerprint image The position of the screen and the position of the second touch screen corresponding to the second fingerprint image; matching the position of the first touch screen and the position of the second touch screen to obtain a matching value; if the matching value is lower than Preset matching value, then calibrate the first fingerprint image and the second fingerprint image to obtain the calibrated reference first fingerprint image and reference second fingerprint image, the reference first fingerprint image and the reference The second fingerprint image is used for the image difference operation.
  • the instructions in the program are also specifically used to perform the following operations: collect light sensing values; detect Whether the light sensing value is greater than or equal to a preset threshold; when the brightness of the display screen is the first brightness, at least one first fingerprint image is collected, and when the brightness of the display screen is the second brightness, Acquiring at least one second fingerprint image to obtain at least two fingerprint images, the first brightness being less than the second brightness includes: if it is detected that the light perception value is greater than or equal to a preset threshold, the When the brightness is the first brightness, at least one first fingerprint image is collected, and when the brightness of the display screen is the second brightness, at least one second fingerprint image is collected to obtain at least two fingerprint images.
  • the program further includes the following operations: if it is detected that the light-sensing value is less than the preset threshold, Collect the user fingerprint image at the second brightness to obtain the target fingerprint image.
  • the instructions in the program are specifically used to perform the following operations: use the target fingerprint image with a preset fingerprint template Match, get the reference match value; if the reference match value is greater than or equal to the preset match value, then pass the identity authentication, remove the lock screen interface; or, if the reference match value is less than the preset match value, then regain the target Fingerprint image.
  • the first brightness is 0.
  • the instructions in the program are also specifically used to perform the following operations: determine that the display screen is in an unlocked state; obtain a trigger instruction; according to the trigger Command to activate the light sensor.
  • the electronic device includes a hardware structure and/or a software module corresponding to each function.
  • the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is executed by hardware or computer software driven hardware depends on the specific application and design constraints of the technical solution. Professional technicians can use different methods for each specific application to implement the described functions, but such implementation should not be considered beyond the scope of this application.
  • the embodiments of the present application may divide the functional unit of the electronic device according to the above method example, for example, each functional unit may be divided corresponding to each function, or two or more functions may be integrated into one processing unit.
  • the above integrated unit may be implemented in the form of hardware or software functional unit. It should be noted that the division of the units in the embodiments of the present application is schematic, and is only a division of logical functions. In actual implementation, there may be another division manner.
  • FIG. 6 is a block diagram of functional units of a fingerprint collection device 600 involved in an embodiment of the present application.
  • the fingerprint collection device 600 is applied to electronic equipment, and includes a collection unit 601 and a determination unit 602, wherein,
  • the collection unit 601 is configured to collect at least one first fingerprint image when the brightness of the display screen is the first brightness, and collect at least one second fingerprint when the brightness of the display screen is the second brightness Image to obtain at least two fingerprint images, the first brightness is less than the second brightness;
  • the determining unit 602 is configured to determine a target fingerprint image according to the at least two fingerprint images.
  • the fingerprint collecting apparatus 600 may further include a storage unit 603 for storing program codes and data of electronic devices, and the storage unit 603 may be a memory.
  • the electronic device first collects at least one first fingerprint image when the brightness of the display screen is the first brightness, and collects at least one of the first fingerprint images when the brightness of the display screen is the second brightness
  • One second fingerprint image obtains at least two fingerprint images, the first brightness is less than the second brightness
  • the target fingerprint image is determined according to the at least two fingerprint images.
  • the electronic device according to the embodiment of the present application can adjust the brightness of different display screens and further collect fingerprint images under different brightnesses.
  • the present application can solve the problem of light interference and collect accurate fingerprints, thereby improving the unlock success rate. Improve the accuracy and intelligence of electronic devices for fingerprint collection.
  • the determining unit 602 is specifically configured to: scan the at least one first fingerprint image and the at least one first fingerprint image Two fingerprint images to obtain the image feature value of each fingerprint image; comparing each image feature value with a preset feature value, and selecting a first target feature value and a second target feature value greater than the preset image feature value, The first target feature value is selected from the at least one first fingerprint image, and the second target feature value is selected from the at least one second fingerprint image; the first target fingerprint image is Perform image difference operation with the second target fingerprint image to obtain a target fingerprint image.
  • the at least two fingerprint images include a first fingerprint image and a second fingerprint image
  • the determining unit 602 is specifically configured to determine the target fingerprint image based on the at least two fingerprint images : Perform image difference operation on the first fingerprint image and the second fingerprint image to obtain a target fingerprint image.
  • the determining unit 602 is further specifically configured to: before determining the target fingerprint image according to the at least two fingerprint images, determine the position of the first touch screen corresponding to the first fingerprint image and A position of the second touch screen corresponding to the second fingerprint image; matching the position of the first touch screen and the position of the second touch screen to obtain a matching value; if the matching value is lower than a preset match Value, then calibrate the first fingerprint image and the second fingerprint image to obtain the calibrated reference first fingerprint image and reference second fingerprint image, the reference first fingerprint image and the reference second fingerprint The image is used for the image difference operation.
  • the collection unit 601 is specifically configured to: collect a light-sensing value; detect the light-sensing value Is greater than or equal to a preset threshold; when the brightness of the display screen is the first brightness, at least one first fingerprint image is collected, and when the brightness of the display screen is the second brightness, at least one first fingerprint image is collected Two fingerprint images to obtain at least two fingerprint images, the first brightness being less than the second brightness includes: if it is detected that the light perception value is greater than or equal to a preset threshold, the brightness on the display screen is the first brightness Next, collect at least one first fingerprint image, and collect at least one second fingerprint image to obtain at least two fingerprint images when the brightness of the display screen is the second brightness.
  • the collection unit 601 after detecting whether the light sensing value is greater than or equal to a preset threshold, the collection unit 601 is specifically configured to: when it is detected that the light sensing value is less than the preset threshold, Collect the user fingerprint image at the second brightness to obtain the target fingerprint image.
  • the determination unit 602 is further specifically configured to: when the first brightness of the display screen is 0, collect at least one A first fingerprint image; when the brightness of the display screen is the second brightness, at least one second fingerprint image is collected.
  • the collecting unit 601 is further specifically configured to: determine that the display screen is in an unlocked state; obtain a trigger instruction; and start the light sensing according to the trigger instruction sensor.
  • the under-screen fingerprint module is disposed below the preset area of the display screen.
  • An embodiment of the present application further provides a computer storage medium, wherein the computer storage medium stores a computer program for electronic data exchange, and the computer program causes the computer to perform part or all of the steps of any method described in the foregoing method embodiments ,
  • the aforementioned computer includes electronic devices.
  • An embodiment of the present application also provides a computer program product, the computer program product includes a non-transitory computer-readable storage medium that stores the computer program, and the computer program is operable to cause the computer to perform any of the methods described in the foregoing method embodiments Some or all steps of the method.
  • the computer program product may be a software installation package, and the computer includes an electronic device.
  • the disclosed device may be implemented in other ways.
  • the device embodiments described above are only schematic.
  • the division of the above-mentioned units is only a division of logical functions.
  • there may be other division methods for example, multiple units or components may be combined or integrated To another system, or some features can be ignored, or not implemented.
  • the displayed or discussed mutual couplings or direct couplings or communication connections may be indirect couplings or communication connections through some interfaces, devices or units, and may be in electrical or other forms.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place or may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit.
  • the above integrated unit may be implemented in the form of hardware or software functional unit.
  • the above integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it may be stored in a computer readable memory.
  • the technical solution of the present application essentially or part of the contribution to the existing technology or all or part of the technical solution can be embodied in the form of a software product, the computer software product is stored in a memory, Several instructions are included to enable a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the above methods in various embodiments of the present application.
  • the aforementioned memory includes: U disk, Read-Only Memory (ROM, Read-Only Memory), Random Access Memory (RAM, Random Access Memory), mobile hard disk, magnetic disk or optical disk and other media that can store program codes.
  • the program may be stored in a computer-readable memory, and the memory may include: a flash disk , Read-Only Memory (English: Read-Only Memory, abbreviation: ROM), Random Access Device (English: Random Access Memory, abbreviation: RAM), magnetic disk or optical disk, etc.
  • ROM Read-Only Memory
  • RAM Random Access Device
  • magnetic disk or optical disk etc.

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Abstract

一种指纹采集方法及电子设备，所述电子设备的显示屏的预设区域设置有屏下指纹模组，所述方法包括：在所述显示屏的亮度为第一亮度下，采集至少一张第一指纹图像，在所述显示屏的亮度为第二亮度下，采集至少一张第二指纹图像，得到至少两张指纹图像，所述第一亮度小于所述第二亮度（S201）；根据所述至少两张指纹图像确定目标指纹图像（S202）。该方法能够解决光干扰的问题，采集准确的指纹，进而使得解锁成功率提高，提高电子设备进行指纹采集的准确性和智能性。

Description

指纹采集方法及相关装置 技术领域
本申请涉及智能移动终端技术领域，具体涉及一种指纹采集方法及相关装置。
背景技术
目前市面上的智能电子设备基本都支持触摸屏幕操作功能，用户通常提前将几组指纹录入终端的数据库中，用户直接点击屏幕就可以进行操作，与设备交互。有些智能终端还有指纹识别功能，可以利用指纹进行唤醒解锁、身份验证等。然而外界的光线能够干扰指纹识别功能，导致无法快捷的进行解锁等操作，降低了用户的体验度。
发明内容
本申请实施例提供了一种指纹采集方法及相关装置，提高电子设备进行指纹采集的准确性和智能性。
第一方面，本申请实施例提供一种指纹采集方法，应用于电子设备，所述电子设备的显示屏的预设区域设置有屏下指纹模组，所述方法包括：
在所述显示屏的亮度为第一亮度下，采集至少一张第一指纹图像，在所述显示屏的亮度为第二亮度下，采集至少一张第二指纹图像，得到至少两张指纹图像，所述第一亮度小于所述第二亮度；
根据所述至少两张指纹图像确定目标指纹图像。
第二方面，本申请实施例提供一种指纹采集装置，应用于电子设备，所述电子设备的显示屏的预设区域设置有屏下指纹模组，所述指纹采集装置包括采集单元和确定单元，其中，
所述采集单元，用于在所述显示屏的亮度为第一亮度下，采集至少一张第一指纹图像，在所述显示屏的亮度为第二亮度下，采集至少一张第二指纹图像，得到至少两张指纹图像，所述第一亮度小于所述第二亮度；
所述确定单元，用于根据所述至少两张指纹图像确定目标指纹图像。
第三方面，本申请实施例提供一种电子设备，包括处理器、存储器、通信接口以及一个或多个程序，其中，上述一个或多个程序被存储在上述存储器中，并且被配置由上述处理器执行，上述程序包括用于执行本申请实施例第一方面任一方法中的步骤的指令。
第四方面，本申请实施例提供了一种计算机可读存储介质，其中，上述计算机可读存储介质存储用于电子数据交换的计算机程序，其中，上述计算机程序使得计算机执行如本申请实施例第一方面任一方法中所描述的部分或全部步骤。
第五方面，本申请实施例提供了一种计算机程序产品，其中，上述计算机程序产品包括存储了计算机程序的非瞬时性计算机可读存储介质，上述计算机程序可操作来使计算机执行如本申请实施例第一方面任一方法中所描述的部分或全部步骤。该计算机程序产品可以为一个软件安装包。
可以看出，本申请实施例中，电子设备首先在所述显示屏的亮度为第一亮度下，采集至少一张第一指纹图像，在所述显示屏的亮度为第二亮度下，采集至少一张第二指纹图像，得到至少两张指纹图像，所述第一亮度小于所述第二亮度，最后，根据所述至少两张指纹图像确定目标指纹图像。可见，本申请实施例的电子设备能够根据调整不同的显示屏的亮度，进一步的采集在不同亮度下的指纹图像，本申请能够解决光干扰的问题，采集准确的指纹，进而使得解锁成功率提高，提高电子设备进行指纹采集的准确性和智能性。
附图说明
为了更清楚地说明本申请实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本申请的一 些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1A是本申请实施例提供的一种电子设备采集指纹的示意图；
图1B是本申请实施例提供的一种电子设备的结构示意图；
图2是本申请实施例提供的一种指纹采集方法的流程示意图；
图3是本申请实施例提供的另一种指纹采集方法的流程示意图；
图4是本申请实施例提供的另一种指纹采集方法的流程示意图；
图5是本申请实施例提供的一种电子设备的结构示意图；
图6是本申请实施例提供的一种指纹采集装置的功能单元组成框图。
具体实施方式
为了使本技术领域的人员更好地理解本申请方案，下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
本申请的说明书和权利要求书及上述附图中的术语“第一”、“第二”等是用于区别不同对象，而不是用于描述特定顺序。此外，术语“包括”和“具有”以及它们任何变形，意图在于覆盖不排他的包含。例如包含了一系列步骤或单元的过程、方法、系统、产品或设备没有限定于已列出的步骤或单元，而是可选地还包括没有列出的步骤或单元，或可选地还包括对于这些过程、方法、产品或设备固有的其他步骤或单元。
在本文中提及“实施例”意味着，结合实施例描述的特定特征、结构或特性可以包含在本申请的至少一个实施例中。在说明书中的各个位置出现该短语并不一定均是指相同的实施例，也不是与其它实施例互斥的独立的或备选的实施例。本领域技术人员显式地和隐式地理解的是，本文所描述的实施例可以与其它实施例相结合。
本申请实施例所涉及到的电子设备可以是具备指纹识别能力的电子设备，该电子设备可以包括各种具有指纹识别功能的手持设备、车载设备、可穿戴设备、计算设备或连接到无线调制解调器的其他处理设备，以及各种形式的用户设备(User Equipment，UE)，移动台(Mobile Station，MS)，终端设备(terminal device)等等。
下面对本申请实施例进行详细介绍。
指纹识别技术把一个人同他的指纹对应起来，通过比较他的指纹和预先保存的指纹进行比较，比较不同指纹的细节特征点来进行鉴别，就可以验证他的真实身份。指纹图像是以图像形式作为载体的指纹的数据。指纹是人类手指末端指腹上由凹凸的皮肤所形成的纹路。指纹是人类手指末端指腹上由凹凸的皮肤所形成的纹路，由于人的指纹是遗传与环境共同作用的，其与人体健康也密切相关，因而指纹人人皆有，却各不相同，由于指纹重复率极小，大约150亿分之一，故其称为“人体身份证”。正是基于指纹的这种特征，指纹作为身份认证的信息被广泛使用。指纹纹路经常出现中断、分叉或转折，这些断点、分叉点和转折点被称为"特征点"。每个人指纹纹路在图案、断点和交叉点上各不相同，是唯一的，依靠这种唯一性和稳定性，我们才能创造指纹识别技术。每个人包括指纹在内的皮肤纹路在图案、断点和交叉点上各不相同，呈现唯一性且终生不变。指纹识别技术拥有识别速度快、采集方便和价格低廉等优点，被广泛应用于图像处理、模式识别、计算机视觉等众多学科领域。
一般在指纹识别的应用中，用户通常提前将几组指纹录入数据库中，每一组指纹为用户的一个手指对应的指纹。比如，一组指纹为用户的食指的指纹，另一组指纹为用户的拇指的指纹。针对每一组，系统会将该组指纹的特征点等信息提取出来，并保存成一组指纹对应的特征点模板。当用户需要输入指纹进行某项操作时，用户将指纹放置在指纹识别装置上，以使指纹识别装置识别出用户输入的指纹，之后终端提取出该用户输入的指纹的特征点，并与之前用户预先录入数据库中的多组指纹进行一一匹配，若用户输入的指纹的特征点与终端的 数据库中预先录入的一组指纹的特征点匹配，则匹配成功，终端允许执行相应的操作。例如，比如用户需要对终端的屏幕进行解锁，此时，用户输入的指纹匹配成功时，终端将屏幕解锁。
获得良好的指纹图像是一个十分复杂的问题。因为用于测量的指纹仅是相当小的一片表皮，所以指纹采集设备应有足够好的分辨率以获得指纹的细节。目前所用的指纹图像采集设备，基本上基于三种技术基础：光学技术、半导体硅技术、超声波技术。
借助光学技术采集指纹是历史最久远、使用最广泛的技术。将手指放在光学镜片上，手指在内置光源照射下，用棱镜将其投射在电荷耦合器件上，进而形成脊线(指纹图像中具有一定宽度和走向的纹线)呈黑色、谷线(纹线之间的凹陷部分)呈白色的数字化的、可被指纹设备算法处理的多灰度指纹图像。
光感屏幕指纹识别技术即屏下指纹识别技术，就是将识别模组放置在手机屏幕面板之下，在识别的时候通过模组发射的RGB射光穿透面板在指尖形成指纹光膜，随后将采集的指纹信息反馈回识别模组，通过系统比对完成操作。示例性的，如图1A所示，电子设备为101，显示屏为102，采集指纹的预设区域为103,104为指纹放大图；一个电子设备101采集指纹104的示意图，当手指接触屏幕时，OLED屏幕发出的光线穿透盖板将指纹纹理照亮，指纹反射光线穿透屏幕返回传感器，最终形成指纹图像来进行识别。
其中，所述电子设备101的显示屏102的预设区域103设置有屏下指纹模组105。所述屏下指纹模组105设于所述显示屏102的预设区域103的下方，具体如图1B所示。
在比较指纹与存储数据之前，扫描仪处理器要确保获取到了清晰的图像。它会检查像素暗度的平均值或者一个小样本的整体值，如果图像整体太暗或太亮，该次扫描便会被放弃。于是扫描仪调整曝光时间以允许更多或者更少的光线进入，再扫描一次。如果暗度合适，扫描仪系统会继续检查图像的清晰度(指纹扫描的锐度)。处理器将查看在图像上沿垂直和水平方向移动的若干直线。如果与嵴纹垂直的线由非常暗的像素和非常亮的像素交互组成，那么就意味着指纹图像有很好的清晰度。
指纹识别系统是一个典型的模式识别系统，包括指纹图像获取、处理、特征提取和比对等模块。
其中，触控屏包括显示屏和触控面板(Touch Panel，TP)，触控屏包括指纹采集区域。该指纹采集区域是触控屏中的一片区域，即大小能够供多个手指同时按压的大区域，而非仅能够供单个手指按压的小区域。该指纹采集区域所在的位置可以是触控屏的中间区域、触控屏的上部分区域、触控屏的下部分区域等，在此不作限定。
需要说明的是，图1A中所示的电子设备和显示屏的形态和数量仅用于举例，并不构成对本申请实施例的限定。
请参阅图2，图2是本申请实施例提供了一种指纹采集方法的流程示意图，应用于电子设备，所述电子设备的显示屏的预设区域设置有屏下指纹模组；如图所示，本指纹采集方法包括：
S201，在所述显示屏的亮度为第一亮度下，采集至少一张第一指纹图像，在所述显示屏的亮度为第二亮度下，采集至少一张第二指纹图像，得到至少两张指纹图像，所述第一亮度小于所述第二亮度。
其中，所述第一亮度可以为电子设备中显示屏的0％亮度，即当前显示屏为黑屏状态，所述第二亮度可以为电子设备中显示屏的100％亮度，即当前显示屏为高亮状态，即不同的显示屏亮度可以为强光模式、正常模式或黑屏模式。
举例来说，电子设备启动光感传感器读取光感值，当检测到光强达到50000lux以上时，进入强光模式——首先将手指下显示屏的亮度调黑，利用外界光穿透采集第一张指纹图像，设定为A；接下来将显示屏的亮度打到高亮，再采集第二张指纹图像，设定为B，将B-A，从而得到目标指纹图像，如果光感在50000lux以下时，进入正常模式，将手指下显示屏的亮度调到高亮，然后采集目标指纹图像。
S202，所述电子设备根据所述至少两张指纹图像确定目标指纹图像。
其中，所述预设区域可以是所述显示屏的下侧或者上侧部分显示区域，具体根据屏下指纹模组的设置位置来确定。
可以看出，本申请实施例中，电子设备首先在所述显示屏的亮度为第一亮度下，采集至少一张第一指纹图像，在所述显示屏的亮度为第二亮度下，采集至少一张第二指纹图像，得到至少两张指纹图像，所述第一亮度小于所述第二亮度，最后，根据所述至少两张指纹图像确定目标指纹图像。可见，本申请实施例的电子设备能够调整不同的显示屏的亮度，进一步的采集在不同亮度下的指纹图像，本申请能够解决光干扰的问题，采集准确的指纹，进而使得解锁成功率提高，提高电子设备进行指纹采集的准确性和智能性。
可选的，所述根据所述至少两张指纹图像确定目标指纹图像，包括：扫描所述至少一张第一指纹图像和所述至少一张第二指纹图像，得到每张指纹图像的图像特征值；将所述每个图像特征值与预设特征值比对，选取大于预设图像特征值的第一目标特征值和第二目标特征值，所述第一目标特征值是从所述至少一张第一指纹图像中选取，所述第二目标特征值是从所述至少一张第二指纹图像中选取；将所述第一目标指纹图像和所述第二目标指纹图像做图像差分运算，得到目标指纹图像。
其中，所述预设特征值可以为电子设备分析用户提前在电子设备上录制的指纹模板得到的特征值。
其中，所述指纹图像与图像特征值之间为一一对应的关系。
其中，图像差分运算又称为图像相减运算，是指对同一景物在不同时间拍摄的图像或同一景物在不同波段的图像进行相减，得到一个输出图像的过程。
可见，本示例中，电子设备能够从多个指纹图像中通过其特征值，得到最优指纹图像，避免出现采集的图像模糊的情况，在将选取好的指纹图像做差分运算，能够解决光干扰的问题，得到准去的指纹图像，进而使得解锁成功率提高，提高电子设备进行指纹采集的准确性和智能性。
可选的，所述至少两张指纹图像包括第一指纹图像和第二指纹图像，所述根据所述至少两张指纹图像确定目标指纹图像，包括：将所述第一指纹图像和所述第二指纹图像做图像差分运算，得到目标指纹图像。
其中，所述第一指纹图像和所述第二指纹图像处于同一位置。
可见，本示例中，电子设备根据显示屏当前的环境光亮度调整采集指纹时的亮度值，有利于指纹信息的采集，指纹识别速度快，精准，并通过差分运算，去除了光干扰的影响，提高采集指纹信息的准确度和效率，用户体验更好。
可以理解，所述屏下指纹模组设置于所述显示屏的预设区域下方。
可以理解，在根据所述至少两张指纹图像确定目标指纹图像之前，所述方法还包括：确定所述第一指纹图像对应的第一触控屏位置和所述第二指纹图像对应的第二触控屏位置；将所述第一触控屏位置和所述第二触控屏位置做匹配，得到匹配值；若所述匹配值低于预设匹配值，则将所述第一指纹图像和所述第二指纹图像进行校准，得到校准后的参考第一指纹图像和参考第二指纹图像，所述参考第一指纹图像和所述参考第二指纹图像用于所述图像差分运算。
其中，电子设备通过每个角上电荷的相对差异进行计算，准确地定位触摸事件发生的位置，并将此信息传输给触摸屏驱动程序。
其中，最佳的指纹图像的触控屏位置为显示屏的预设区域，通过调整所述预设区域的亮度值，将所述预设区域的亮度提高到可以用清晰准确采集指纹信息的亮度阈值，便于指纹的采集。
其中，预设匹配值为出厂时厂商自定。
其中，所述图像校正是指对失真图像进行的复原性处理，根据图像失真原因，建立相应的数学模型，使其能从失真图象中计算得到真实图象的估值，使其根据预先规定的误差准则， 沿着使图象失真的逆过程最大程度恢复地接近真实图象。
可见，本示例中，电子设备在进行图像差分运算时，需要满足前提条件，两次采集的图像位置需在同一对应的位置上，若不在，进行图像校准后，在进行差分运算，有利于指纹信息采集的准确性和智能性。
在一个可能的示例中，在所述显示屏的亮度为第一亮度下，采集至少一张第一指纹图像之前，所述方法还包括：采集光感值；检测所述光感值是否大于或等于预设阈值；
所述在所述显示屏的亮度为第一亮度下，采集至少一张第一指纹图像，在所述显示屏的亮度为第二亮度下，采集至少一张第二指纹图像，得到至少两张指纹图像，所述第一亮度小于所述第二亮度包括：若检测到所述光感值大于或等于预设阈值，在所述显示屏的亮度为第一亮度下，采集至少一张第一指纹图像，在所述显示屏的亮度为第二亮度下，采集至少一张第二指纹图像，得到至少两张指纹图像。
其中，所述第一亮度为0的场景可以指关闭显示屏，或者对于有背光的LCD屏幕，关闭背光，自身完全不发光的场景，此处不做唯一限定。
可见，本示例中，电子设备首先采集第一显示屏亮度为黑屏的特定情况下的指纹图像，之后在采集第二显示屏亮度下的指纹图像，根据两种不同的亮度特征，提高电子设备进行指纹采集的准确性和智能性。
可以理解，开启光感传感器采集光感值之前，所述方法还包括：确定所述显示屏处于未解锁状态；获取触发指令；根据所述触发指令启动光感传感器。
可选的，在所述检测所述光感值是否大于或等于预设阈值之后，所述方法还包括：若检测到所述光感值小于预设阈值时，在所述第二亮度下采集用户指纹图像，得到目标指纹图像。
其中，所述第二亮度可以为电子设备中显示屏的100％亮度，即当前显示屏为高亮状态。
可见，本示例中，电子设备根据显示屏当前的环境光亮度调整采集指纹时的亮度值，有利于指纹信息的采集，去除了光干扰的影响，提高采集指纹信息的准确度和效率。
可以理解，在根据所述至少两张指纹图像确定目标指纹图像之后，所述方法还包括：将所述目标指纹图像与预设的指纹模板做匹配，得到参考匹配值；若所述参考匹配值大于或等于预设匹配值，则通过身份认证，移除锁屏界面；或者，若所述参考匹配值小于预设匹配值，则重新得到目标指纹图像。
其中，所述预设指纹模板为用户提前在电子设备上录制的指纹模板。
其中，预设匹配值可以为图像的相似度。
具体实现中，电子设备在检测到所述指纹信息后，将检测到的指纹信息与电子设备预设的指纹信息进行匹配。例如，用户用食指触控电子设备显示屏，电子设备检测到食指的指纹后，将检测到的食指指纹与电子设备内预设的指纹信息一一比对，得到预设指纹信息中匹配度最高的一个指纹信息的匹配度。通过身份认证后，显示主界面或启动某些应用等。
可见，本示例中，电子设备将最终确定的目标指纹图像与指纹模板做匹配，提高了身份认证的准确性，保障了设备信息的安全性，提高电子设备进行指纹设别的准确性和安全性。
可选的，所述第一亮度为0。
可选的，开启光感传感器采集光感值之前，所述方法还包括：确定所述显示屏处于未解锁状态；获取触发指令；根据所述触发指令启动光感传感器。
其中，在电子设备开启光感传感器之前，电子设备处于未解锁状态，当检测到触发指令时，控制启动光感传感器，并采集用户的手指指纹信息。
其中，预设阈值可以为50000lux、40000lux等，此处不做唯一限定。
与上述图2所示的实施例一致的，请参阅图3，图3是本申请实施例提供的一种指纹采集方法的流程示意图，应用于如图1A所述的电子设备，所述电子设备的显示屏的预设区域设置有屏下指纹模组，如图所示，本指纹采集方法包括：
S301，所述电子设备开启光感传感器采集光感值。
S302，所述电子设备检测所述光感值是否大于或等于预设阈值。
S303，所述电子设备在所述显示屏的亮度为第一亮度下，采集第一指纹图像。
S304，所述电子设备在所述显示屏的亮度为第二亮度下，采集第二指纹图像。
S305，所述电子设备将所述第一指纹图像和所述第二指纹图像做图像差分运算，得到目标指纹图像。
可以看出，本申请实施例中，电子设备首先在所述显示屏的亮度为第一亮度下，采集至少一张第一指纹图像，在所述显示屏的亮度为第二亮度下，采集至少一张第二指纹图像，得到至少两张指纹图像，所述第一亮度小于所述第二亮度，最后，根据所述至少两张指纹图像确定目标指纹图像。可见，本申请实施例的电子设备能够调整不同的显示屏的亮度，进一步的采集在不同亮度下的指纹图像，本申请能够解决光干扰的问题，采集准确的指纹，进而使得解锁成功率提高，提高电子设备进行指纹采集的准确性和智能性。
此外，电子设备根据显示屏当前的环境光亮度调整采集指纹时的亮度值，有利于指纹信息的采集，指纹识别速度快，精准，并通过差分运算，去除了光干扰的影响，提高采集指纹信息的准确度和效率，用户体验更好。
与上述图2所示的实施例一致的，请参阅图4，图4是本申请实施例提供的一种指纹采集方法的流程示意图，应用于如图1A所述的电子设备，所述电子设备的显示屏的预设区域设置有屏下指纹模组，如图所示，本指纹采集方法包括：
S401，所述电子设备开启光感传感器采集光感值。
S402，所述电子设备检测所述光感值是否大于或等于预设阈值。
S403，若否，所述电子设备将所述显示屏的亮度调整为第二亮度。
S404，所述电子设备在所述第二亮度下采集用户指纹图像，得到目标指纹图像。
S405，所述电子设备将所述目标指纹图像与预设的指纹模板做匹配，得到参考匹配值。
S406，若所述参考匹配值大于或等于预设匹配值，则通过身份认证，移除锁屏界面。
可以看出，本申请实施例中，电子设备首先在所述显示屏的亮度为第一亮度下，采集至少一张第一指纹图像，在所述显示屏的亮度为第二亮度下，采集至少一张第二指纹图像，得到至少两张指纹图像，所述第一亮度小于所述第二亮度，最后，根据所述至少两张指纹图像确定目标指纹图像。可见，本申请实施例的电子设备能够调整显示屏为不同的亮度，进一步的采集在不同亮度下的指纹图像，本申请能够解决光干扰的问题，采集准确的指纹，进而使得解锁成功率提高，提高电子设备进行指纹采集的准确性和智能性。
此外，电子设备根据显示屏当前的环境光亮度调整采集指纹时的亮度值，有利于指纹信息的采集，指纹识别速度快，精准，并通过差分运算，去除了光干扰的影响，提高采集指纹信息的准确度和效率，用户体验更好。
此外，电子设备将最终确定的目标指纹图像与指纹模板做匹配，提高了身份认证的准确性，保障了设备信息的安全性，提高电子设备进行指纹设别的准确性和安全性。
与上述图2、图3、图4所示的实施例一致的，请参阅图5，图5是本申请实施例提供的一种电子设备500的结构示意图，如图所示，所述电子设备500包括应用处理器510、存储器520、通信接口530以及一个或多个程序521，其中，所述一个或多个程序521被存储在上述存储器520中，并且被配置由上述应用处理器510执行，所述一个或多个程序521包括用于执行以下步骤的指令；
在所述显示屏的亮度为第一亮度下，采集至少一张第一指纹图像，在所述显示屏的亮度为第二亮度下，采集至少一张第二指纹图像，得到至少两张指纹图像，所述第一亮度小于所述第二亮度；
根据所述至少两张指纹图像确定目标指纹图像。
可以看出，本申请实施例中，电子设备首先在所述显示屏的亮度为第一亮度下，采集至少一张第一指纹图像，在所述显示屏的亮度为第二亮度下，采集至少一张第二指纹图像，得到至少两张指纹图像，所述第一亮度小于所述第二亮度，最后，根据所述至少两张指纹图像 确定目标指纹图像。可见，本申请实施例的电子设备能够根调整不同的显示屏的亮度，进一步的采集在不同亮度下的指纹图像，本申请能够解决光干扰的问题，采集准确的指纹，进而使得解锁成功率提高，提高电子设备进行指纹采集的准确性和智能性。
在一个可能的示例中，在所述根据所述至少两张指纹图像确定目标指纹图像方面，所述程序中的指令具体用于执行以下操作：扫描所述至少一张第一指纹图像和所述至少一张第二指纹图像，得到每张指纹图像的图像特征值；将所述每个图像特征值与预设特征值比对，选取大于预设图像特征值的第一目标特征值和第二目标特征值，所述第一目标特征值是从所述至少一张第一指纹图像中选取，所述第二目标特征值是从所述至少一张第二指纹图像中选取；将所述第一目标指纹图像和所述第二目标指纹图像做图像差分运算，得到目标指纹图像。
在一个可能的示例中，所述至少两张指纹图像包括第一指纹图像和第二指纹图像，在所述根据所述至少两张指纹图像确定目标指纹图像方面，所述程序中的指令具体用于执行以下操作：将所述第一指纹图像和所述第二指纹图像做图像差分运算，得到目标指纹图像。
在一个可能的示例中，在所述根据所述至少两张指纹图像确定目标指纹图像之前，所述程序还包括用于执行以下操作的指令：确定所述第一指纹图像对应的第一触控屏位置和所述第二指纹图像对应的第二触控屏位置；将所述第一触控屏位置和所述第二触控屏位置做匹配，得到匹配值；若所述匹配值低于预设匹配值，则将所述第一指纹图像和所述第二指纹图像进行校准，得到校准后的参考第一指纹图像和参考第二指纹图像，所述参考第一指纹图像和所述参考第二指纹图像用于所述图像差分运算。
在一个可能的示例中，在所述显示屏的亮度为第一亮度下，采集至少一张第一指纹图像之前，所述程序中的指令还具体用于执行以下操作：采集光感值；检测所述光感值是否大于或等于预设阈值；所述在所述显示屏的亮度为第一亮度下，采集至少一张第一指纹图像，在所述显示屏的亮度为第二亮度下，采集至少一张第二指纹图像，得到至少两张指纹图像，所述第一亮度小于所述第二亮度包括：若检测到所述光感值大于或等于预设阈值，在所述显示屏的亮度为第一亮度下，采集至少一张第一指纹图像，在所述显示屏的亮度为第二亮度下，采集至少一张第二指纹图像，得到至少两张指纹图像。
在一个可能的示例中，在所述检测所述光感值是否大于或等于预设阈值之后，所述程序还包括用于执行以下操作：若检测到所述光感值小于预设阈值时，在所述第二亮度下采集用户指纹图像，得到目标指纹图像。
在一个可能的示例中，在所述根据所述至少两张指纹图像确定目标指纹图像之后，所述程序中的指令具体用于执行以下操作：将所述目标指纹图像与预设的指纹模板做匹配，得到参考匹配值；若所述参考匹配值大于或等于预设匹配值，则通过身份认证，移除锁屏界面；或者，若所述参考匹配值小于预设匹配值，则重新得到目标指纹图像。
在一个可能的示例中，所述第一亮度为0。
在一个可能的示例中，在开启光感传感器采集光感值之前，所述程序中的指令还具体用于执行以下操作：确定所述显示屏处于未解锁状态；获取触发指令；根据所述触发指令启动光感传感器。
上述主要从方法侧执行过程的角度对本申请实施例的方案进行了介绍。可以理解的是，电子设备为了实现上述功能，其包含了执行各个功能相应的硬件结构和/或软件模块。本领域技术人员应该很容易意识到，结合本文中所提供的实施例描述的各示例的单元及算法步骤，本申请能够以硬件或硬件和计算机软件的结合形式来实现。某个功能究竟以硬件还是计算机软件驱动硬件的方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用使用不同方法来实现所描述的功能，但是这种实现不应认为超出本申请的范围。
本申请实施例可以根据上述方法示例对电子设备进行功能单元的划分，例如，可以对应各个功能划分各个功能单元，也可以将两个或两个以上的功能集成在一个处理单元中。上述集成的单元既可以采用硬件的形式实现，也可以采用软件功能单元的形式实现。需要说明的 是，本申请实施例中对单元的划分是示意性的，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式。
图6是本申请实施例中所涉及的指纹采集装置600的功能单元组成框图。该指纹采集装置600应用于电子设备，包括采集单元601、确定单元602，其中，
所述采集单元601，用于在所述显示屏的亮度为第一亮度下，采集至少一张第一指纹图像，在所述显示屏的亮度为第二亮度下，采集至少一张第二指纹图像，得到至少两张指纹图像，所述第一亮度小于所述第二亮度；
所述确定单元602，用于根据所述至少两张指纹图像确定目标指纹图像。
其中，所述指纹采集装置600还可以包括存储单元603，用于存储电子设备的程序代码和数据，存储单元603可以是存储器。
可以看出，本申请实施例中，电子设备首先在所述显示屏的亮度为第一亮度下，采集至少一张第一指纹图像，在所述显示屏的亮度为第二亮度下，采集至少一张第二指纹图像，得到至少两张指纹图像，所述第一亮度小于所述第二亮度，最后，根据所述至少两张指纹图像确定目标指纹图像。可见，本申请实施例的电子设备能够调整不同的显示屏的亮度，进一步的采集在不同亮度下的指纹图像，本申请能够解决光干扰的问题，采集准确的指纹，进而使得解锁成功率提高，提高电子设备进行指纹采集的准确性和智能性。
在一个可能的示例中，在所述根据所述至少两张指纹图像确定目标指纹图像方面，所述确定单元602具体用于：扫描所述至少一张第一指纹图像和所述至少一张第二指纹图像，得到每张指纹图像的图像特征值；将所述每个图像特征值与预设特征值比对，选取大于预设图像特征值的第一目标特征值和第二目标特征值，所述第一目标特征值是从所述至少一张第一指纹图像中选取，所述第二目标特征值是从所述至少一张第二指纹图像中选取；将所述第一目标指纹图像和所述第二目标指纹图像做图像差分运算，得到目标指纹图像。
在一个可能的示例中，所述至少两张指纹图像包括第一指纹图像和第二指纹图像，在所述根据所述至少两张指纹图像确定目标指纹图像方面，所述确定单元602具体用于：将所述第一指纹图像和所述第二指纹图像做图像差分运算，得到目标指纹图像。
在一个可能的示例中，所述确定单元602还具体用于：在所述根据所述至少两张指纹图像确定目标指纹图像之前，确定所述第一指纹图像对应的第一触控屏位置和所述第二指纹图像对应的第二触控屏位置；将所述第一触控屏位置和所述第二触控屏位置做匹配，得到匹配值；若所述匹配值低于预设匹配值，则将所述第一指纹图像和所述第二指纹图像进行校准，得到校准后的参考第一指纹图像和参考第二指纹图像，所述参考第一指纹图像和所述参考第二指纹图像用于所述图像差分运算。
在一个可能的示例中，在所述显示屏的亮度为第一亮度下，采集至少一张第一指纹图像之前，所述采集单元601具体用于：采集光感值；检测所述光感值是否大于或等于预设阈值；所述在所述显示屏的亮度为第一亮度下，采集至少一张第一指纹图像，在所述显示屏的亮度为第二亮度下，采集至少一张第二指纹图像，得到至少两张指纹图像，所述第一亮度小于所述第二亮度包括：若检测到所述光感值大于或等于预设阈值，在所述显示屏的亮度为第一亮度下，采集至少一张第一指纹图像，在所述显示屏的亮度为第二亮度下，采集至少一张第二指纹图像，得到至少两张指纹图像。
在一个可能的示例中，在所述检测所述光感值是否大于或等于预设阈值之后，所述采集单元601具体用于：若检测到所述光感值小于预设阈值时，在所述第二亮度下采集用户指纹图像，得到目标指纹图像。
在一个可能的示例中，在所述根据所述至少两张指纹图像确定目标指纹图像之后，所述确定单元602还具体用于：在所述显示屏的第一亮度为0时，采集至少一张第一指纹图像；在所述显示屏的亮度为第二亮度下，采集至少一张第二指纹图像。
在一个可能的示例中，在开启光感传感器采集光感值之前，所述采集单元601还具体用于：确定所述显示屏处于未解锁状态；获取触发指令；根据所述触发指令启动光感传感器。
在一个可能的示例中，所述屏下指纹模组设置于所述显示屏的预设区域下方。
本申请实施例还提供一种计算机存储介质，其中，该计算机存储介质存储用于电子数据交换的计算机程序，该计算机程序使得计算机执行如上述方法实施例中记载的任一方法的部分或全部步骤，上述计算机包括电子设备。
本申请实施例还提供一种计算机程序产品，上述计算机程序产品包括存储了计算机程序的非瞬时性计算机可读存储介质，上述计算机程序可操作来使计算机执行如上述方法实施例中记载的任一方法的部分或全部步骤。该计算机程序产品可以为一个软件安装包，上述计算机包括电子设备。
需要说明的是，对于前述的各方法实施例，为了简单描述，故将其都表述为一系列的动作组合，但是本领域技术人员应该知悉，本申请并不受所描述的动作顺序的限制，因为依据本申请，某些步骤可以采用其他顺序或者同时进行。其次，本领域技术人员也应该知悉，说明书中所描述的实施例均属于优选实施例，所涉及的动作和模块并不一定是本申请所必须的。
在上述实施例中，对各个实施例的描述都各有侧重，某个实施例中没有详述的部分，可以参见其他实施例的相关描述。
在本申请所提供的几个实施例中，应该理解到，所揭露的装置，可通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如上述单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是电性或其它的形式。
上述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
另外，在本申请各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。上述集成的单元既可以采用硬件的形式实现，也可以采用软件功能单元的形式实现。
上述集成的单元如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储器中。基于这样的理解，本申请的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的全部或部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储器中，包括若干指令用以使得一台计算机设备(可为个人计算机、服务器或者网络设备等)执行本申请各个实施例上述方法的全部或部分步骤。而前述的存储器包括：U盘、只读存储器(ROM，Read-Only Memory)、随机存取存储器(RAM，Random Access Memory)、移动硬盘、磁碟或者光盘等各种可以存储程序代码的介质。
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，该程序可以存储于一计算机可读存储器中，存储器可以包括：闪存盘、只读存储器(英文：Read-Only Memory，简称：ROM)、随机存取器(英文：Random Access Memory，简称：RAM)、磁盘或光盘等。
以上对本申请实施例进行了详细介绍，本文中应用了具体个例对本申请的原理及实施方式进行了阐述，以上实施例的说明只是用于帮助理解本申请的方法及其核心思想；同时，对于本领域的一般技术人员，依据本申请的思想，在具体实施方式及应用范围上均会有改变之处，综上所述，本说明书内容不应理解为对本申请的限制。

Claims (20)

  1. 一种指纹采集方法，其特征在于，应用于电子设备，所述电子设备的显示屏的预设区域设置有屏下指纹模组，所述方法包括：
    在所述显示屏的亮度为第一亮度下，采集至少一张第一指纹图像，在所述显示屏的亮度为第二亮度下，采集至少一张第二指纹图像，得到至少两张指纹图像，所述第一亮度小于所述第二亮度；
    根据所述至少两张指纹图像确定目标指纹图像。
  2. 根据权利要求1所述的方法，其特征在于，所述根据所述至少两张指纹图像确定目标指纹图像，包括：
    扫描所述至少一张第一指纹图像和所述至少一张第二指纹图像，得到每张指纹图像的图像特征值；
    将所述每个图像特征值与预设特征值比对，选取大于预设图像特征值的第一目标特征值和第二目标特征值；
    根据所述第一目标特征值从所述至少一张第一指纹图像中选取第一目标指纹图像，及根据所述第二目标特征值从所述至少一张第二指纹图像中选取第二目标指纹图像；
    将所述第一目标指纹图像和所述第二目标指纹图像做图像差分运算，得到目标指纹图像。
  3. 根据权利要求1所述的方法，其特征在于，所述至少两张指纹图像包括第一指纹图像和第二指纹图像，所述根据所述至少两张指纹图像确定目标指纹图像，包括：
    将所述第一指纹图像和所述第二指纹图像做图像差分运算，得到目标指纹图像。
  4. 根据权利要求2或3所述的方法，其特征在于，在所述根据所述至少两张指纹图像确定目标指纹图像之前，所述方法还包括：
    确定所述第一指纹图像对应的第一触控屏位置和所述第二指纹图像对应的第二触控屏位置；
    将所述第一触控屏位置和所述第二触控屏位置做匹配，得到匹配值；
    若所述匹配值低于预设匹配值，则将所述第一指纹图像和所述第二指纹图像进行校准，得到校准后的参考第一指纹图像和参考第二指纹图像，所述参考第一指纹图像和所述参考第二指纹图像用于所述图像差分运算。
  5. 根据权利要求1所述的方法，其特征在于，在所述显示屏的亮度为第一亮度下，采集至少一张第一指纹图像之前，所述方法还包括：
    采集光感值；
    检测所述光感值是否大于或等于预设阈值；
    所述在所述显示屏的亮度为第一亮度下，采集至少一张第一指纹图像，在所述显示屏的亮度为第二亮度下，采集至少一张第二指纹图像，得到至少两张指纹图像，所述第一亮度小于所述第二亮度包括：
    若检测到所述光感值大于或等于预设阈值，在所述显示屏的亮度为第一亮度下，采集至少一张第一指纹图像，在所述显示屏的亮度为第二亮度下，采集至少一张第二指纹图像，得到至少两张指纹图像。
  6. 根据权利要求5所述的方法，其特征在于，在所述检测所述光感值是否大于或等于预设阈值之后，所述方法还包括：
    若检测到所述光感值小于预设阈值时，在所述第二亮度下采集用户指纹图像，得到目标指纹图像。
  7. 根据权利要求1或6所述的方法，其特征在于，在所述根据所述至少两张指纹图像确定目标指纹图像之后，所述方法还包括：
    将所述目标指纹图像与预设的指纹模板做匹配，得到参考匹配值；
    若所述参考匹配值大于或等于预设匹配值，则通过身份认证，移除锁屏界面；或者，
    若所述参考匹配值小于预设匹配值，则重新得到目标指纹图像。
  8. 根据权利要求1所述的方法，其特征在于，所述第一亮度为0。
  9. 根据权利要求1所述的方法，其特征在于，在开启光感传感器采集光感值之前，所述方法还包括：
    确定所述显示屏处于未解锁状态；
    获取触发指令；
    根据所述触发指令启动光感传感器。
  10. 一种指纹采集装置，其特征在于，应用于电子设备，所述电子设备的显示屏的预设区域设置有屏下指纹模组，所述指纹采集装置包括采集单元和确定单元，其中，
    所述采集单元，用于在所述显示屏的亮度为第一亮度下，采集至少一张第一指纹图像，在所述显示屏的亮度为第二亮度下，采集至少一张第二指纹图像，得到至少两张指纹图像，所述第一亮度小于所述第二亮度；
    所述确定单元，用于根据所述至少两张指纹图像确定目标指纹图像。
  11. 根据权利要求10所述的装置，其特征在于，在所述根据所述至少两张指纹图像确定目标指纹图像方面，所述确定单元具体用于：扫描所述至少一张第一指纹图像和所述至少一张第二指纹图像，得到每张指纹图像的图像特征值；将所述每个图像特征值与预设特征值比对，选取大于预设图像特征值的第一目标特征值和第二目标特征值；根据所述第一目标特征值从所述至少一张第一指纹图像中选取第一目标指纹图像，及根据所述第二目标特征值从所述至少一张第二指纹图像中选取第二目标指纹图像；将所述第一目标指纹图像和所述第二目标指纹图像做图像差分运算，得到目标指纹图像。
  12. 根据权利要求10所述的装置，其特征在于，在所述至少两张指纹图像包括第一指纹图像和第二指纹图像，所述根据所述至少两张指纹图像确定目标指纹图像方面，所述确定单元具体用于：将所述第一指纹图像和所述第二指纹图像做图像差分运算，得到目标指纹图像。
  13. 根据权利要求11或12所述的装置，其特征在于，在所述根据所述至少两张指纹图像确定目标指纹图像之前，所述确定单元还用于：确定所述第一指纹图像对应的第一触控屏位置和所述第二指纹图像对应的第二触控屏位置；将所述第一触控屏位置和所述第二触控屏位置做匹配，得到匹配值；若所述匹配值低于预设匹配值，则将所述第一指纹图像和所述第二指纹图像进行校准，得到校准后的参考第一指纹图像和参考第二指纹图像，所述参考第一指纹图像和所述参考第二指纹图像用于所述图像差分运算。
  14. 根据权利要求10所述的装置，其特征在于，所述指纹采集装置还包括检测单元，所述检测单元用于在所述显示屏的亮度为第一亮度下，采集至少一张第一指纹图像之前，采集光感值；检测所述光感值是否大于或等于预设阈值；
    所述采集单元具体用于：所述在所述显示屏的亮度为第一亮度下，采集至少一张第一指纹图像，在所述显示屏的亮度为第二亮度下，采集至少一张第二指纹图像，得到至少两张指纹图像，所述第一亮度小于所述第二亮度包括：
    若检测到所述光感值大于或等于预设阈值，在所述显示屏的亮度为第一亮度下，采集至少一张第一指纹图像，在所述显示屏的亮度为第二亮度下，采集至少一张第二指纹图像，得到至少两张指纹图像。
  15. 根据权利要求14所述的装置，其特征在于，在所述检测所述光感值是否大于或等于预设阈值之后，所述采集单元还具体用于：在检测到所述光感值小于预设阈值时，在所述第二亮度下采集用户指纹图像，得到目标指纹图像。
  16. 根据权利要求10或15所述的装置，其特征在于，在所述根据所述至少两张指纹图像确定目标指纹图像之后，所述确定单元还具体用于：将所述目标指纹图像与预设的指纹模板做匹配，得到参考匹配值；若所述参考匹配值大于或等于预设匹配值，则通过身份认证，移除锁屏界面；或者，若所述参考匹配值小于预设匹配值，则重新得到目标指纹图像。
  17. 根据权利要求10所述的装置，其特征在于，所述第一亮度为0。
  18. 根据权利要求10所述的装置，其特征在于，在开启光感传感器采集光感值之前，所述采集单元还具体用于：确定所述显示屏处于未解锁状态；获取触发指令；根据所述触发指令启动光感传感器。
  19. 一种电子设备，其特征在于，包括处理器、存储器、通信接口，以及一个或多个程序，所述一个或多个程序被存储在所述存储器中，并且被配置由所述处理器执行，所述程序包括用于执行如权利要求1-9任一项所述的方法中的步骤的指令。
  20. 一种计算机可读存储介质，其特征在于，存储用于电子数据交换的计算机程序，其中，所述计算机程序使得计算机执行如权利要求1-9任一项所述的方法。
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