CN114973342A - Fingerprint acquisition method and device, storage medium and electronic equipment - Google Patents

Fingerprint acquisition method and device, storage medium and electronic equipment Download PDF

Info

Publication number
CN114973342A
CN114973342A CN202210587584.1A CN202210587584A CN114973342A CN 114973342 A CN114973342 A CN 114973342A CN 202210587584 A CN202210587584 A CN 202210587584A CN 114973342 A CN114973342 A CN 114973342A
Authority
CN
China
Prior art keywords
information
fingerprint
exposure
brightness
display screen
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
CN202210587584.1A
Other languages
Chinese (zh)
Inventor
袁学剑
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Guangdong Oppo Mobile Telecommunications Corp Ltd
Original Assignee
Guangdong Oppo Mobile Telecommunications Corp Ltd
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 Guangdong Oppo Mobile Telecommunications Corp Ltd filed Critical Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority to CN202210587584.1A priority Critical patent/CN114973342A/en
Publication of CN114973342A publication Critical patent/CN114973342A/en
Pending legal-status Critical Current

Links

Images

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
    • G06V40/1306—Sensors therefor non-optical, e.g. ultrasonic or capacitive sensing
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/048—Interaction techniques based on graphical user interfaces [GUI]
    • G06F3/0484—Interaction techniques based on graphical user interfaces [GUI] for the control of specific functions or operations, e.g. selecting or manipulating an object, an image or a displayed text element, setting a parameter value or selecting a range
    • G06F3/04847—Interaction techniques to control parameter settings, e.g. interaction with sliders or dials
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/048—Interaction techniques based on graphical user interfaces [GUI]
    • G06F3/0487—Interaction techniques based on graphical user interfaces [GUI] using specific features provided by the input device, e.g. functions controlled by the rotation of a mouse with dual sensing arrangements, or of the nature of the input device, e.g. tap gestures based on pressure sensed by a digitiser
    • G06F3/0488—Interaction techniques based on graphical user interfaces [GUI] using specific features provided by the input device, e.g. functions controlled by the rotation of a mouse with dual sensing arrangements, or of the nature of the input device, e.g. tap gestures based on pressure sensed by a digitiser using a touch-screen or digitiser, e.g. input of commands through traced gestures
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Abstract

The application discloses a fingerprint acquisition method, a fingerprint acquisition device, a storage medium and electronic equipment. The fingerprint acquisition method is applied to electronic equipment, the electronic equipment comprises a display screen, and the fingerprint acquisition method comprises the following steps: acquiring screen parameter information of a display screen; determining target exposure information of fingerprint acquisition according to the screen parameter information; and collecting fingerprints according to the target exposure information. The method and the device can improve the accuracy of fingerprint collection.

Description

Fingerprint acquisition method and device, storage medium and electronic equipment
Technical Field
The present application belongs to the field of electronic technologies, and in particular, to a fingerprint acquisition method and apparatus, a storage medium, and an electronic device.
Background
With the progress of technology, biometrics is gradually applied to the electronic field for identifying identity, avoiding the trouble of input. For example, the technology of fingerprint recognition under the screen is increasingly widely applied to electronic devices such as smart phones. However, the fingerprint recognition scheme provided by the related art has poor accuracy in fingerprint acquisition.
Disclosure of Invention
The embodiment of the application provides a fingerprint acquisition method, a fingerprint acquisition device, a storage medium and electronic equipment, which can improve the accuracy of fingerprint acquisition.
In a first aspect, an embodiment of the present application provides a fingerprint acquisition method, which is applied to an electronic device, where the electronic device includes a display screen, and the fingerprint acquisition method includes:
acquiring screen parameter information of the display screen;
determining target exposure information of fingerprint acquisition according to the screen parameter information;
and collecting fingerprints according to the target exposure information.
In a second aspect, an embodiment of the present application provides a fingerprint acquisition device, which is applied to an electronic device, the electronic device includes a display screen, the fingerprint acquisition device includes:
the acquisition module is used for acquiring screen parameter information of the display screen;
the determining module is used for determining target exposure information acquired by the fingerprint according to the screen parameter information;
and the acquisition module is used for acquiring fingerprints according to the target exposure information.
In a third aspect, an embodiment of the present application provides a storage medium, on which a computer program is stored, and when the computer program is executed on a computer, the computer is caused to execute the fingerprint acquisition method provided in the embodiment of the present application.
In a fourth aspect, an embodiment of the present application further provides an electronic device, which includes a memory and a processor, where the processor is configured to execute the fingerprint acquisition method provided in the embodiment of the present application by calling a computer program stored in the memory.
In the embodiment of the application, the screen parameter information of the display screen is acquired, the target exposure information acquired by the fingerprint is determined according to the screen parameter information, and the fingerprint is acquired according to the target exposure information. The phenomenon that cross stripes with dark brightness exist in a fingerprint image generated by brightness drop due to pixel reset in a display screen refresh period in the fingerprint acquisition process can be avoided, so that a relatively accurate fingerprint image is obtained, and the accuracy of fingerprint acquisition can be improved.
Drawings
The technical solutions and advantages of the present application will become apparent from the following detailed description of specific embodiments of the present application when taken in conjunction with the accompanying drawings.
Fig. 1 is a schematic flowchart of a fingerprint acquisition method according to an embodiment of the present disclosure.
Fig. 2 is a voltage diagram corresponding to the brightness drop of the display panel in the related art.
Fig. 3 is a schematic view of an exposure process of a fingerprint acquisition method according to an embodiment of the present application.
Fig. 4 is a second flowchart of a fingerprint acquisition method according to an embodiment of the present application.
Fig. 5 is a schematic structural diagram of a fingerprint acquisition device according to an embodiment of the present application.
Fig. 6 is a schematic structural diagram of an electronic device provided in an embodiment of the present application.
Detailed Description
Referring to the drawings, wherein like reference numbers refer to like elements, the principles of the present application are illustrated as being implemented in a suitable computing environment. The following description is based on illustrated embodiments of the application and should not be taken as limiting the application with respect to other embodiments that are not detailed herein.
It is understood that the execution subject of the embodiment of the present application may be an electronic device such as a smart phone or a tablet computer.
Referring to fig. 1, fig. 1 is a first flowchart illustrating a fingerprint acquisition method according to an embodiment of the present disclosure. The fingerprint acquisition method is applied to electronic equipment, the electronic equipment comprises a display screen, and the process can comprise the following steps:
and 101, acquiring screen parameter information of a display screen.
Taking an electronic device as an example of a smart phone, in the related art, fingerprint identification under a screen needs to perform light supplement on fingerprint unlocking through a display screen, for example, there is a process of resetting pixels of the display screen in the process of acquiring each frame of fingerprint image, and during the period of resetting the pixels, the luminance supplemented by the display screen is reduced, which is referred to as luminance drop for short, please refer to fig. 2, where fig. 2 is a voltage schematic diagram corresponding to the luminance drop of the display screen in the related art. Fig. 2 shows a luminance drop voltage curve measured by a photodiode during the light filling of fingerprints under the screen, where fig. 2.1 shows that one display period a-b is 2.8ms, one display period a-b has one luminance drop, and fig. 2.2 shows that the time of the one luminance drop period a-b is 0.44ms, and since each frame of fingerprint image is collected by line-by-line exposure, the luminance drop due to pixel reset reduces the perceived luminance of the fingerprint sensor when exposing the corresponding line image along with the luminance drop, if the pixel reset times of the display screen during partial line exposure are different from the pixel reset times of the display screen during the adjacent line exposure in the whole exposure period, for example, when the pixel reset times of the display screen during partial line exposure are greater than the pixel reset times of the display screen during the adjacent line exposure, the luminance value of the fingerprint line image obtained during partial line exposure is lower than the fingerprint line image obtained during the adjacent line exposure, eventually appearing as darker horizontal stripes in intensity on the fingerprint image. Therefore, it can be known that the accuracy of the acquired fingerprint image is low in the related art.
It should be noted that, in this embodiment, the electronic device is provided with the fingerprint identification module to when making the user press the region that the screen corresponds the fingerprint identification module with the finger, can accomplish fingerprint identification to user's fingerprint information, obtain the fingerprint identification result, thereby can carry out further operation according to the fingerprint identification result, for example, unblock screen, confirm payment, etc.
In this embodiment, the purpose of obtaining the screen parameter information of the display screen is to obtain specific information of the drop of the pixel brightness of the display screen.
102, determining the target exposure information of fingerprint collection according to the screen parameter information.
After screen parameter information related to the brightness drop of the pixels of the display screen is obtained, target exposure information of fingerprint collection is determined according to the screen parameter information. Specifically, the brightness drop information of the pixels of the display screen can be obtained according to the screen parameter information, and the target exposure information of fingerprint collection can be determined according to the brightness drop information.
In some optional embodiments, the brightness falling period may be determined according to the brightness falling information; and determining the target exposure information according to the brightness falling periods, wherein each frame of fingerprint image is acquired in a line-by-line exposure mode, the target exposure information comprises each line of exposure time, and the number of the brightness falling periods corresponding to each line of exposure time is the same.
Specifically, the brightness falling period may be a brightness falling period shown in fig. 2.2 in fig. 2, each frame of fingerprint image is obtained in a line-by-line exposure manner, an optimal target exposure time is obtained by calculation according to the brightness falling period, the number of the brightness falling periods corresponding to each line of exposure time in the optimal target exposure time is the same, please refer to fig. 3, and fig. 3 is a schematic view of an exposure process of the fingerprint acquisition method provided in the embodiment of the present application. Illustratively, the exposure of the first row corresponds to 4 brightness falling periods, the exposure of the second row also corresponds to 4 brightness falling periods, the exposure of the nth row also corresponds to 4 brightness falling periods, and the exposure of the last row (M rows) also corresponds to 4 brightness falling periods, that is, the number of the pixel brightness falling periods corresponding to the exposure time of each row is the same. The phenomenon of fingerprint image horizontal stripes caused by different pixel brightness falling periods between exposure lines can be avoided. From the realization of a hardware structure, the exposure time of each line of the fingerprint sensor can be adjusted according to the brightness falling period so as to obtain the target exposure time with the same number of brightness falling periods corresponding to each line of exposure time.
In some optional embodiments, a fall time interval between two adjacent brightness falls may be determined according to the brightness fall information; determining target exposure information of fingerprint acquisition according to the fall time interval, wherein each frame of fingerprint image is acquired in a line-by-line exposure mode, the target exposure information of the fingerprint acquisition comprises line interval time for acquiring two adjacent lines of image information in one frame of fingerprint image and total line interval time for acquiring one frame of fingerprint image, the total line interval time is equal to the line interval time multiplied by the total line number, and the total line interval time is less than the fall time interval.
Specifically, the time interval between two adjacent brightness drops is shown in fig. 3, Ta may be used to represent the time interval between two adjacent brightness drops, a time interval exists between the exposure of the first row of image information and the exposure of the second row of image information, a time interval exists between the exposure of the second row of image information and the exposure of the third row of image information, and so on, a time interval also exists between the exposure of the penultimate row of image information and the exposure of the last row (M rows) of image information, the time intervals are the same and can be represented by Tb, because the exposure time of each row is the same, if the influence of the brightness drops on the fingerprint image is to be avoided, M × Tb < Ta needs to be constrained, the number of brightness drop cycles corresponding to each row of exposure time is ensured to be the same, and the phenomenon of horizontal streaks of the fingerprint image caused by the difference of the brightness drop cycles corresponding to the row and the adjacent row of exposure time is avoided, from the aspect of hardware structure implementation, the line interval time of exposing two adjacent lines of image information by the fingerprint sensor can be adjusted according to the time interval between two adjacent brightness drops, so that the target exposure time of which the total line interval time is less than the drop time interval is obtained.
And 103, collecting fingerprints according to the target exposure information.
After the target exposure information is determined through the above mode, in the fingerprint acquisition process, fingerprint images are acquired through the target exposure information. For example, after determining that the exposure time of each line corresponds to the target exposure time with the same number of brightness drop cycles, the optional embodiment controls the fingerprint sensor to acquire the fingerprint image through the target exposure time, and for example, after determining that the total line interval time is less than the target exposure time of the drop time interval, the optional embodiment may calculate that the exposure is started only when the waiting time of the fingerprint sensor does not exceed Ta-M × Tb after the brightness drop time of the display screen is detected, so as to avoid the acquired fingerprint image from generating horizontal stripes.
In an alternative embodiment, in order to improve the efficiency of fingerprint image acquisition, the exposure may be started immediately after the brightness drop of the display screen pixels is detected, and the fingerprint is acquired according to the determined target exposure time.
In the above embodiment, it is important to accurately detect the brightness drop information of the pixels of the display screen, and the brightness drop information of the pixels of the display screen can be determined by obtaining the frame rate and the duty ratio of the display screen. The refresh rate of the display screen can be obtained through the frame rate, the time period when the pixels of the display screen are in brightness can be obtained through the duty ratio, the time period when the pixels of the display screen are in brightness drop during resetting can be obtained according to the refresh rate and the duty ratio, and if the fingerprint sensor supports external trigger control information, the refresh rate and the duty ratio of the display screen can be obtained through a vertical synchronization signal (VSYNC) or a te (tracking Effect signal) signal output by the display screen, so that pixel brightness drop information is obtained. If the fingerprint sensor does not support external triggering, the FOV (field of view) small window area drawing is supported, the duration and the period of pixel brightness falling can be obtained by controlling the fingerprint sensor to expose and draw the image brightness of the central local area (the data transmission quantity can be reduced). If the drawing of the small window area of the FOV does not support, a complete picture needs to be taken, the data of the complete picture is transmitted, and the brightness falling duration and period are obtained through the complete picture. When the image brightness falling information is obtained through the small-window image or the whole image, the brightness information of a series of image sequences can reflect the pixel brightness falling period.
In the embodiment of the application, the screen parameter information of the display screen is acquired, the target exposure information acquired by the fingerprint is determined according to the screen parameter information, and the fingerprint is acquired according to the target exposure information. The phenomenon that the fingerprint image generated by brightness drop has cross stripes with dark brightness due to pixel reset in the refresh period of the display screen in the fingerprint acquisition process can be avoided, so that a relatively accurate fingerprint image is obtained, and the accuracy of fingerprint acquisition can be improved.
Referring to fig. 4, fig. 4 is a second flowchart illustrating a fingerprint acquisition method according to an embodiment of the present disclosure. The fingerprint acquisition method is applied to electronic equipment, the electronic equipment comprises a display screen, and the process can comprise the following steps:
initial exposure information is acquired by pre-exposure 201.
The initial exposure information of the fingerprint sensor can be obtained through one-time pre-exposure calculation, wherein the pre-exposure can be understood as one piece of initial exposure information obtained by pre-exposure before fingerprint acquisition or in the fingerprint acquisition process. The initial exposure information may include an initial exposure start time at which the fingerprint sensor initially acquires an image of one frame, an initial line interval time at which adjacent lines of image information are acquired, an initial per-line exposure time, and/or an initial total exposure time, etc.
202, acquiring the frame rate and the duty ratio of the display screen.
And 203, determining the brightness drop information of the pixels of the display screen according to the frame rate and the duty ratio.
With respect to steps 202-203:
taking an electronic device as an example of a smart phone, in the related art, fingerprint identification under a screen needs to perform light supplement on fingerprint unlocking through a display screen, for example, there is a process of resetting pixels of the display screen in the process of acquiring each frame of fingerprint image, and during the period of resetting the pixels, the luminance supplemented by the display screen is reduced, which is referred to as luminance drop for short, please refer to fig. 2, where fig. 2 is a voltage schematic diagram corresponding to the luminance drop of the display screen in the related art. Fig. 2 shows a luminance drop voltage curve measured by a photodiode during the light filling of fingerprints under the screen, where fig. 2.1 shows that one display period a-b is 2.8ms, one display period a-b has one luminance drop, and fig. 2.2 shows that the time of the one luminance drop period a-b is 0.44ms, and since each frame of fingerprint image is collected by line-by-line exposure, the luminance drop due to pixel reset reduces the perceived luminance of the fingerprint sensor when exposing the corresponding line image along with the luminance drop, if the pixel reset times of the display screen during partial line exposure are different from the pixel reset times of the display screen during the adjacent line exposure in the whole exposure period, for example, when the pixel reset times of the display screen during partial line exposure are greater than the pixel reset times of the display screen during the adjacent line exposure, the luminance value of the fingerprint line image obtained during partial line exposure is lower than the fingerprint line image obtained during the adjacent line exposure, eventually appearing as darker horizontal stripes in intensity on the fingerprint image. Therefore, it can be seen that the accuracy of the acquired fingerprint image is low in the related art.
In this embodiment, the brightness drop information of the pixels of the display screen can be determined by obtaining the frame rate and the duty ratio of the display screen. The refresh rate of the display screen can be obtained through the frame rate, the time period when the pixels of the display screen are in brightness can be obtained through the duty ratio, the time period when the pixels of the display screen are in brightness falling (brightness falling period) can be obtained according to the refresh rate and the duty ratio, if the fingerprint sensor supports external trigger control information, the refresh rate and the duty ratio of the display screen can be obtained through a vertical synchronizing signal (VSYNC) or a te (tracking Effect signal) signal output by the display screen, and then pixel brightness falling information is obtained. If the fingerprint sensor does not support external triggering, the FOV (field of view) small window area drawing is supported, the duration and the period of pixel brightness falling can be obtained by controlling the fingerprint sensor to expose and draw the image brightness of the central local area (the data transmission quantity can be reduced). If the drawing of the small window area of the FOV does not support, a complete picture needs to be taken, the data of the complete picture is transmitted, and the brightness falling duration and period are obtained through the complete picture. When the image brightness falling information is obtained through the small-window image or the whole image, the brightness information of a series of image sequences can reflect the pixel brightness falling period.
And 204, adjusting the initial exposure time according to the brightness falling information to obtain target exposure information.
And adjusting the initial exposure information according to the brightness falling period to obtain target exposure information.
In some optional embodiments, the initial exposure information includes initial exposure time of each line of one frame of image acquired by the fingerprint sensor, the brightness drop information may include a brightness drop period, the brightness drop period adjusts the initial exposure time of each line to obtain target exposure information, the target exposure time includes exposure time of each line of target, and the number of the brightness drop periods corresponding to the exposure time of each line is the same.
Specifically, the brightness dropping period may be a brightness dropping period shown in fig. 2.2 in fig. 2, each frame of fingerprint image is obtained by line-by-line exposure, an optimal target exposure time is obtained by calculation according to the brightness dropping period, and the number of brightness dropping periods corresponding to each line of exposure time in the optimal target exposure time is the same, as shown in fig. 3, 4 brightness dropping periods correspond to the first line of exposure, 4 brightness dropping periods also correspond to the second line of exposure, and 4 brightness dropping periods also correspond to the nth line of exposure until the last line of exposure (M lines) is also corresponding to the 4 brightness dropping periods, that is, the number of pixel brightness dropping periods corresponding to each line of exposure time is the same. The phenomenon of fingerprint image horizontal stripes caused by different pixel brightness falling periods between exposure lines can be avoided. In terms of hardware structure implementation, the exposure time of each line of the fingerprint sensor can be adjusted according to the brightness falling period, so that the exposure time of each line of targets with the same number of brightness falling periods corresponding to each line of exposure time can be obtained. And after the exposure time of each line of the target is obtained, adjusting the initial exposure time of each line according to the exposure time of each line of the target so as to adjust the initial exposure time of each line to the exposure time of each line of the target.
In some optional embodiments, the initial exposure information includes an initial line interval time for acquiring adjacent line image information of a frame of fingerprint image initially acquired by the fingerprint sensor, the luminance drop information may include a drop time interval between two adjacent luminance drops, the initial line interval time is adjusted according to the drop time interval to obtain target exposure information, the target exposure information includes a target line interval time for acquiring two adjacent lines of image information of a frame of fingerprint image and a total line interval time for acquiring a frame of fingerprint image, the total line interval time is equal to the line interval time multiplied by the total line number, and the total line interval time is smaller than the luminance drop time interval.
Specifically, the time interval between two adjacent brightness drops is shown in fig. 3, Ta may be used to represent the time interval between two adjacent brightness drops, a time interval exists between the exposure of the first row of image information and the exposure of the second row of image information, a time interval exists between the exposure of the second row of image information and the exposure of the third row of image information, and so on, a time interval also exists between the exposure of the penultimate row of image information and the exposure of the last row (M rows) of image information, the time intervals may be represented by Tb, because the exposure time of each row is the same, if the influence of the brightness drops on the fingerprint image is to be avoided, M × Tb < Ta needs to be constrained, it is ensured that the same number of brightness drop cycles corresponding to each row of exposure time is obtained, and the phenomenon of fingerprint image horizontal streaks caused by the difference of the brightness drop cycles corresponding to the adjacent row of exposure time is avoided, and adjusting the time for initially acquiring the adjacent line image information interval according to the constraint condition, wherein the time is adjusted to be the line interval time for acquiring the adjacent line image information of the target according to the constraint condition. In terms of hardware structure implementation, the initial row interval time obtained by the fingerprint sensor through initial exposure can be adjusted according to the time interval between two adjacent brightness falls, so as to obtain the target row interval time of which the total row interval time is less than the fall time interval.
The exposure is started immediately after the end of the brightness drop of the display screen pixels is detected 205.
And 206, collecting fingerprints according to the target exposure information.
With respect to steps 205-206:
in order to improve the efficiency of fingerprint image acquisition, exposure can be started immediately after the brightness drop of pixels of a display screen is detected, and fingerprints are acquired according to determined target exposure information. Specifically, whether the brightness drop of the display screen pixels is finished or not can be detected by detecting whether the display screen pixels are reset or not, if the display screen pixels are reset, the brightness drop of the display screen pixels is finished, and if the display screen pixels are not reset, the brightness drop of the display screen pixels is not finished.
In an optional embodiment, the fingerprint sensor may wait for a period of time to restart exposure after detecting that the brightness falls, and after determining that the total line interval time is less than the target line interval time of the fall time interval through the above optional embodiment, it may be calculated only to ensure that exposure is started when the waiting time of the fingerprint sensor does not exceed Ta-M Tb after detecting that the brightness of the display screen falls, so as to avoid the collected fingerprint image from generating horizontal stripes.
According to the fingerprint acquisition method provided by the embodiment, the initial time and the total exposure time of the fingerprint sensor are controlled from the essence generated by the transverse stripes of the fingerprint image, so that the number of brightness falling periods corresponding to each line of fingerprint image information in the exposure process is the same, the brightness falling amount of all lines of fingerprint images is consistent, the generation of the transverse stripes of the fingerprint image is effectively inhibited, the acquisition of more accurate fingerprint images is facilitated, and the unlocking success rate of the fingerprint image is ensured.
Referring to fig. 5, fig. 5 is a schematic structural diagram of a fingerprint acquisition device according to an embodiment of the present application. This fingerprint collection device 300 is applied to electronic equipment, and this electronic equipment includes the display screen, and this fingerprint collection device 300 includes: an acquisition module 301, a determination module 302, and an acquisition module 303.
An obtaining module 301, configured to obtain screen parameter information of a display screen.
And the determining module 302 is configured to determine the target exposure information of fingerprint acquisition according to the screen parameter information.
And the acquisition module 303 is used for acquiring fingerprints according to the target exposure information.
In an alternative embodiment, the determining module 302 is further configured to:
acquiring the brightness drop information of the display screen pixels according to the screen parameter information;
and determining target exposure information of fingerprint acquisition according to the brightness drop information.
In an alternative embodiment, the determining module 302 is further configured to:
determining a brightness falling period according to the brightness falling information;
and determining the target exposure information according to the brightness falling periods, wherein each frame of fingerprint image is acquired in a line-by-line exposure mode, the target exposure information comprises each line of exposure time, and the number of the brightness falling periods corresponding to each line of exposure time is the same.
In an alternative embodiment, the determining module 302 is further configured to:
determining a falling time interval between two adjacent brightness falls according to the brightness falling information;
and determining target exposure information of fingerprint acquisition according to the fall time interval, wherein each frame of fingerprint image is acquired in a line-by-line exposure mode, the target exposure information of fingerprint acquisition comprises line interval time for acquiring two adjacent lines of image information in one frame of fingerprint image and total line interval time for acquiring one frame of fingerprint image, the total line interval time is equal to the line interval time multiplied by the total line number, and the total line interval time is less than the fall time interval.
In an optional embodiment, the obtaining module 301 is further configured to:
acquiring initial exposure information acquired by a fingerprint and screen parameter information of the display screen;
the determination module 302 is further configured to:
and determining the target exposure information of the fingerprint acquisition according to the screen parameter information and the initial exposure information.
In an optional embodiment, the obtaining module 301 is further configured to:
acquiring the initial exposure information through pre-exposure;
acquiring the frame rate and the duty ratio of the display screen;
the determination module 302 is further configured to:
determining brightness falling information of pixels of the display screen according to the frame rate and the duty ratio;
and adjusting the initial exposure time according to the brightness drop information to obtain target exposure information.
In an optional embodiment, the acquisition module 303 is further configured to:
starting exposure immediately after the brightness drop of the pixels of the display screen is detected to be finished;
and collecting fingerprints according to the target exposure information.
It should be noted that the fingerprint acquisition apparatus provided in the embodiment of the present application and the fingerprint acquisition method in the foregoing embodiment belong to the same concept, and specific implementation processes thereof are described in the foregoing embodiment and are not described herein again.
The embodiment of the present application provides a storage medium, on which a computer program is stored, and when the computer program stored in the storage medium is executed on a processor of an electronic device provided in the embodiment of the present application, the processor of the electronic device is caused to execute any of the steps in the fingerprint acquisition method suitable for the electronic device. The storage medium may be a magnetic disk, an optical disk, a Read Only Memory (ROM), a Random Access Memory (RAM), or the like.
Referring to fig. 6, the electronic device 400 includes a processor 401 and a memory 402. Those skilled in the art will appreciate that the electronic device configuration shown in fig. 6 does not constitute a limitation of the electronic device and may include more or fewer components than those shown, or some components may be combined, or a different arrangement of components. For example, the electronic device 400 may also include a display screen, a fingerprint sensor, a frame rate detection circuit, a duty cycle detection circuit, and so forth.
The processor 401 in the embodiment of the present application may be a general-purpose processor, such as a processor of an ARM architecture.
The memory 402 stores a computer program, which may be a high speed random access memory, but also may be a non-volatile memory, such as at least one magnetic disk storage device, a flash memory device, or other volatile solid state storage device. Accordingly, the memory 402 may also include a memory controller to provide the processor 401 access to the memory 402. The processor 401, by executing the computer program in the memory 402, is configured to perform:
acquiring screen parameter information of the display screen;
determining target exposure information of fingerprint acquisition according to the screen parameter information;
and collecting fingerprints according to the target exposure information.
In an optional embodiment, when the target exposure information of fingerprint collection is determined according to the screen parameter information, the processor may be further configured to:
acquiring brightness falling information of the display screen pixels according to the screen parameter information;
and determining target exposure information of fingerprint acquisition according to the brightness falling information.
In an optional embodiment, in the determining the target exposure information of fingerprint acquisition according to the brightness drop information, the processor is further configured to:
determining a brightness falling period according to the brightness falling information;
and determining the target exposure information according to the brightness falling periods, wherein each frame of fingerprint image is acquired in a line-by-line exposure mode, the target exposure information comprises each line of exposure time, and the number of the brightness falling periods corresponding to each line of exposure time is the same.
In an optional embodiment, in the determining the target exposure information of fingerprint acquisition according to the brightness drop information, the processor is further configured to:
determining a falling time interval between two adjacent brightness falls according to the brightness falling information;
and determining target exposure information of fingerprint acquisition according to the fall time interval, wherein each frame of fingerprint image is acquired in a line-by-line exposure mode, the target exposure information of fingerprint acquisition comprises line interval time for acquiring two adjacent lines of image information in one frame of fingerprint image and total line interval time for acquiring one frame of fingerprint image, the total line interval time is equal to the line interval time multiplied by the total line number, and the total line interval time is less than the fall time interval.
In an optional embodiment, in the acquiring the screen parameter information of the display screen, the processing may be configured to perform:
acquiring initial exposure information acquired by a fingerprint and screen parameter information of the display screen;
when determining the target exposure information of fingerprint acquisition according to the screen parameter information, the processor may be configured to:
and determining the target exposure information of the fingerprint acquisition according to the screen parameter information and the initial exposure information.
In an optional embodiment, in the acquiring initial exposure information of fingerprint acquisition and screen parameter information of the display screen, the processor may be configured to:
acquiring the initial exposure information through pre-exposure;
acquiring the frame rate and the duty ratio of the display screen;
when the target exposure information of fingerprint collection is determined according to the screen parameter information and the initial exposure information, a processor may be configured to:
determining brightness falling information of pixels of the display screen according to the frame rate and the duty ratio;
and adjusting the initial exposure time according to the brightness drop information to obtain target exposure information.
In an alternative embodiment, the processor is operable to perform, when the fingerprint is acquired based on the target exposure information:
starting exposure immediately after the brightness drop of the pixels of the display screen is detected to be finished;
and collecting fingerprints according to the target exposure information.
The fingerprint acquisition method, the fingerprint acquisition device, the storage medium and the electronic device provided by the application are introduced in detail, specific examples are applied in the description to explain the principle and the implementation of the application, and the description of the embodiments is only used for helping to understand the method and the core idea of the application; meanwhile, for those skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.

Claims (10)

1. A fingerprint collection method is applied to electronic equipment, the electronic equipment comprises a display screen, and the fingerprint collection method comprises the following steps:
acquiring screen parameter information of the display screen;
determining target exposure information of fingerprint acquisition according to the screen parameter information;
and collecting fingerprints according to the target exposure information.
2. The fingerprint acquisition method according to claim 1, wherein the determining target exposure information of fingerprint acquisition according to the screen parameter information comprises:
acquiring brightness falling information of the display screen pixels according to the screen parameter information;
and determining target exposure information of fingerprint acquisition according to the brightness drop information.
3. The fingerprint acquisition method according to claim 2, wherein the determining target exposure information for fingerprint acquisition according to the brightness drop information comprises:
determining a brightness falling period according to the brightness falling information;
and determining the target exposure information according to the brightness falling periods, wherein each frame of fingerprint image is acquired in a line-by-line exposure mode, the target exposure information comprises each line of exposure time, and the number of the brightness falling periods corresponding to each line of exposure time is the same.
4. The fingerprint acquisition method according to claim 2, wherein the determining target exposure information for fingerprint acquisition according to the brightness drop information comprises:
determining a falling time interval between two adjacent brightness falls according to the brightness falling information;
and determining target exposure information of fingerprint acquisition according to the fall time interval, wherein each frame of fingerprint image is acquired in a line-by-line exposure mode, the target exposure information of fingerprint acquisition comprises line interval time for acquiring two adjacent lines of image information in one frame of fingerprint image and total line interval time for acquiring one frame of fingerprint image, the total line interval time is equal to the line interval time multiplied by the total line number, and the total line interval time is less than the fall time interval.
5. The fingerprint acquisition method of claim 1, wherein the acquiring screen parameter information of the display screen comprises:
acquiring initial exposure information acquired by a fingerprint and screen parameter information of the display screen;
the determining of the target exposure information of the fingerprint collection according to the screen parameter information comprises:
and determining the target exposure information of the fingerprint acquisition according to the screen parameter information and the initial exposure information.
6. The fingerprint acquisition method according to claim 5, wherein the acquiring initial exposure information of fingerprint acquisition and screen parameter information of the display screen comprises:
acquiring the initial exposure information through pre-exposure;
acquiring the frame rate and the duty ratio of the display screen;
the determining the target exposure information of the fingerprint collection according to the screen parameter information and the initial exposure information comprises:
determining brightness falling information of pixels of the display screen according to the frame rate and the duty ratio;
and adjusting the initial exposure information according to the brightness drop information to obtain target exposure information.
7. The fingerprint acquisition method according to any one of claims 1-6, wherein the acquiring fingerprints according to the target exposure information comprises:
starting exposure immediately after the brightness drop of the pixels of the display screen is detected to be finished;
and collecting fingerprints according to the target exposure information.
8. The utility model provides a fingerprint collection device which characterized in that is applied to electronic equipment, electronic equipment includes the display screen, fingerprint collection device includes:
the acquisition module is used for acquiring screen parameter information of the display screen;
the determining module is used for determining target exposure information acquired by the fingerprint according to the screen parameter information;
and the acquisition module is used for acquiring fingerprints according to the target exposure information.
9. A storage medium having stored thereon a computer program which, when run on a computer, causes the computer to execute the fingerprint acquisition method according to any one of claims 1 to 7.
10. An electronic device, characterized in that the electronic device comprises a processor and a memory, wherein the memory stores a computer program, and the processor is configured to execute the fingerprint acquisition method according to any one of claims 1 to 7 by calling the computer program stored in the memory.
CN202210587584.1A 2022-05-25 2022-05-25 Fingerprint acquisition method and device, storage medium and electronic equipment Pending CN114973342A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210587584.1A CN114973342A (en) 2022-05-25 2022-05-25 Fingerprint acquisition method and device, storage medium and electronic equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210587584.1A CN114973342A (en) 2022-05-25 2022-05-25 Fingerprint acquisition method and device, storage medium and electronic equipment

Publications (1)

Publication Number Publication Date
CN114973342A true CN114973342A (en) 2022-08-30

Family

ID=82955401

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202210587584.1A Pending CN114973342A (en) 2022-05-25 2022-05-25 Fingerprint acquisition method and device, storage medium and electronic equipment

Country Status (1)

Country Link
CN (1) CN114973342A (en)

Similar Documents

Publication Publication Date Title
US7834931B2 (en) Apparatus and method for capturing an image using a flash and a solid-state image pickup device
US20210243347A1 (en) Generating static images with an event camera
CN102158654B (en) Image capture apparatus and zooming method
JP7405845B2 (en) Display panel grayscale compensation method, grayscale compensation device, and grayscale compensation system
KR102659504B1 (en) Electronic device for capturing image based on difference between a plurality of images and method thereof
JP5979961B2 (en) FOCUS DETECTION DEVICE, FOCUS DETECTION METHOD, AND IMAGING DEVICE
US20060245643A1 (en) Method and apparatus for incorporating iris color in red-eye correction
CN105141853A (en) Image processing method and electronic device
JP2011244046A (en) Imaging apparatus, image processing method, and program storage medium
CN104780320B (en) Ambient light detection method and electronic device
US20170142313A1 (en) Image sensor system
JP2018031907A (en) Imaging apparatus, control method thereof and program
JP2016099626A (en) Method of controlling the flash time of external flash lamp
CN108983250B (en) Proximity detection method and apparatus, electronic apparatus, storage medium, and device
CN113963645B (en) Method and device for testing residual shadow of display panel
US9635277B2 (en) Image sensor, image sensing method, and image photographing apparatus including image sensor
EP3989535A1 (en) Photoelectric conversion device, method of controlling photoelectric conversion device, and information processing apparatus
CN114140834A (en) Optical fingerprint sensing device, driving device and operation method thereof
CN108492266B (en) Image processing method, image processing device, storage medium and electronic equipment
CN114973342A (en) Fingerprint acquisition method and device, storage medium and electronic equipment
CN103139471A (en) Digital photographing apparatus and control method thereof
US10154196B2 (en) Adjusting length of living images
US20220166916A1 (en) Imaging apparatus and method of controlling the same
GB2409288A (en) Indicating exposure information during image capture
JPWO2022205521A5 (en)

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination