CN118262386A - Fingerprint identification method, fingerprint identification device and storage medium - Google Patents
Fingerprint identification method, fingerprint identification device and storage medium Download PDFInfo
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- CN118262386A CN118262386A CN202211642509.7A CN202211642509A CN118262386A CN 118262386 A CN118262386 A CN 118262386A CN 202211642509 A CN202211642509 A CN 202211642509A CN 118262386 A CN118262386 A CN 118262386A
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Abstract
The disclosure relates to a fingerprint identification method, a fingerprint identification device, fingerprint identification equipment and a storage medium. The method comprises the following steps: acquiring a brightness value of first reflected light received by a fingerprint sensor positioned below a terminal screen; determining a first light leakage ratio of a terminal screen according to the brightness value of the first reflected light; adjusting the brightness of the terminal screen to a first brightness based on the first light leakage ratio; and under the condition that the terminal screen is at the first brightness, acquiring second reflected light received by the fingerprint sensor. According to the technical scheme provided by the embodiment of the disclosure, the influence of screen aging on fingerprint information acquisition is reduced, the accuracy of the acquired fingerprint information is improved, the success rate of fingerprint unlocking and fingerprint identification is improved, the terminal screen is adjusted according to the overall brightness of the first reflected light as a reference, the brightness change of each pixel point is not required to be determined, the operation is simple and convenient, and the brightness adjustment efficiency of the terminal screen is improved.
Description
Technical Field
The embodiment of the disclosure relates to the technical field of terminals, in particular to a fingerprint identification method, a fingerprint identification device and a storage medium.
Background
Off-screen optical fingerprint unlocking is also a popular terminal unlocking scheme.
In the related art, a fingerprint sensor is arranged on the back of a terminal screen, when a fingerprint is unlocked, screen light is reflected by a user fingerprint, and then the fingerprint sensor receives reflected fingerprint brightness information and extracts the fingerprint information from the fingerprint brightness information so as to perform subsequent fingerprint unlocking.
However, in the above related art, fingerprint unlocking success rate is low due to the influence of screen aging.
Disclosure of Invention
The embodiment of the disclosure provides a fingerprint identification method, a fingerprint identification device and a storage medium, wherein the technical scheme is as follows:
According to an aspect of an embodiment of the present disclosure, there is provided a fingerprint identification method, the method including:
acquiring a brightness value of first reflected light received by a fingerprint sensor positioned below a terminal screen, wherein the first reflected light refers to reflected light of the terminal screen, which is reflected to the fingerprint sensor by a finger of a user;
determining a first light leakage ratio of the terminal screen according to the brightness value of the first reflected light, wherein the first light leakage ratio refers to the ratio between the brightness value of noise light received by the fingerprint sensor and the brightness value of the first reflected light, and the noise light refers to light received by the fingerprint sensor when the terminal screen is in a screen-off state;
adjusting the brightness of the terminal screen to a first brightness based on the first light leakage ratio;
And under the condition that the terminal screen is at the first brightness, acquiring second reflected light received by the fingerprint sensor, wherein the second reflected light comprises fingerprint information of the user finger.
Optionally, the method further comprises:
Acquiring a corresponding relation between the light leakage ratio of the terminal screen and a compensation parameter, wherein the compensation parameter is used for adjusting the brightness of the terminal screen;
Determining a compensation parameter corresponding to the first light leakage ratio from the corresponding relation between the light leakage ratio and the compensation parameter as a first compensation parameter;
and adjusting the brightness of the terminal screen to the first brightness according to the first compensation parameter.
Optionally, the method further comprises:
Determining a current adjustment parameter for the terminal screen according to the first compensation parameter, wherein the current adjustment parameter refers to an adjustment parameter of input current for a fingerprint sensing area of the terminal screen;
and adjusting the input current of the fingerprint sensing area based on the current adjustment parameter so as to enable the brightness of the fingerprint sensing area to reach the first brightness.
Optionally, the method further comprises:
determining the brightness value of the noise light of the terminal screen from the brightness values of the candidate noise light of different scenes;
And determining a first light leakage ratio of the terminal screen according to the brightness value of the noise light and the brightness value of the first reflected light.
Optionally, the method further comprises:
Acquiring brightness values of a plurality of candidate noise lights, wherein different candidate noise lights correspond to different scenes;
Acquiring current scene information of the terminal screen;
And determining the brightness value of the candidate noise light corresponding to the scene matched with the current scene information from the brightness values of the candidate noise light as the brightness value of the noise light of the terminal screen.
Optionally, the method further comprises:
acquiring a corresponding relation between a brightness value of reflected light of the terminal screen and a light leakage ratio;
And determining the light leakage ratio corresponding to the brightness value of the first reflected light from the corresponding relation between the brightness value of the reflected light and the light leakage ratio, so as to obtain the first light leakage ratio of the terminal screen.
Optionally, the method further comprises:
Determining the maximum brightness of the terminal screen based on the first brightness under the condition that fingerprint identification cannot be realized based on the fingerprint information contained in the second reflected light;
And controlling the terminal screen to gradually trend to the maximum brightness from the first brightness, and acquiring third reflected light received by the fingerprint sensor in the brightness adjustment process of the terminal screen until fingerprint identification is successful, wherein the third reflected light is reflected light containing fingerprint information of the user, which is acquired in the brightness adjustment process.
According to an aspect of the embodiments of the present disclosure, there is provided a fingerprint recognition device, the device including:
the brightness acquisition module is configured to acquire a brightness value of first reflected light received by a fingerprint sensor positioned below a terminal screen, wherein the first reflected light refers to reflected light of the terminal screen, which is reflected to the fingerprint sensor by a finger of a user;
The light leakage ratio acquisition module is configured to determine a first light leakage ratio of the terminal screen according to the brightness value of the first reflected light, wherein the first light leakage ratio refers to the ratio between the brightness value of noise light received by the fingerprint sensor and the brightness value of the first reflected light, and the noise light refers to light received by the fingerprint sensor when the terminal screen is in a screen-off state;
a brightness adjustment module configured to adjust brightness of the terminal screen to a first brightness based on the first light leakage ratio;
And the fingerprint identification module is configured to acquire second reflected light received by the fingerprint sensor under the condition that the terminal screen is at the first brightness, wherein the second reflected light comprises fingerprint information of the user finger.
Optionally, the brightness adjustment module includes:
A relationship obtaining unit configured to obtain a correspondence relationship between a light leakage ratio of the terminal screen and a compensation parameter for adjusting brightness of the terminal screen;
A parameter acquisition unit configured to determine, as a first compensation parameter, a compensation parameter corresponding to the first light leakage ratio from a correspondence between the light leakage ratio and the compensation parameter;
And a brightness adjustment unit configured to adjust the brightness of the terminal screen to the first brightness according to the first compensation parameter.
Optionally, the brightness adjustment unit is configured to:
Determining a current adjustment parameter for the terminal screen according to the first compensation parameter, wherein the current adjustment parameter refers to an adjustment parameter of input current for a fingerprint sensing area of the terminal screen;
and adjusting the input current of the fingerprint sensing area based on the current adjustment parameter so as to enable the brightness of the fingerprint sensing area to reach the first brightness.
Optionally, the light leakage ratio obtaining module includes:
A noise acquisition unit configured to determine a luminance value of noise light of the terminal screen from luminance values of candidate noise light of different scenes;
And a light leakage ratio determining unit configured to determine a first light leakage ratio of the terminal screen according to the brightness value of the noise light and the brightness value of the first reflected light.
Optionally, the noise acquisition unit is configured to:
Acquiring brightness values of a plurality of candidate noise lights, wherein different candidate noise lights correspond to different scenes;
Acquiring current scene information of the terminal screen;
And determining the brightness value of the candidate noise light corresponding to the scene matched with the current scene information from the brightness values of the candidate noise light as the brightness value of the noise light of the terminal screen.
Optionally, the light leakage ratio obtaining module is configured to:
acquiring a corresponding relation between a brightness value of reflected light of the terminal screen and a light leakage ratio;
And determining the light leakage ratio corresponding to the brightness value of the first reflected light from the corresponding relation between the brightness value of the reflected light and the light leakage ratio, so as to obtain the first light leakage ratio of the terminal screen.
Optionally, the apparatus further comprises:
A brightness determining module configured to determine a maximum brightness of the terminal screen based on the first brightness in a case where fingerprint identification cannot be achieved based on fingerprint information contained in the second reflected light;
The fingerprint identification module is configured to control the terminal screen to gradually trend to the maximum brightness from the first brightness, and acquire third reflected light received by the fingerprint sensor in the brightness adjustment process of the terminal screen until fingerprint identification is successful, wherein the third reflected light is reflected light containing fingerprint information of the user finger acquired in the brightness adjustment process.
According to an aspect of the embodiments of the present disclosure, there is provided a fingerprint recognition device, the device including:
A processor;
a memory for storing executable instructions of the processor;
Wherein the processor is configured to:
acquiring a brightness value of first reflected light received by a fingerprint sensor positioned below a terminal screen, wherein the first reflected light refers to reflected light of the terminal screen, which is reflected to the fingerprint sensor by a finger of a user;
determining a first light leakage ratio of the terminal screen according to the brightness value of the first reflected light, wherein the first light leakage ratio refers to the ratio between the brightness value of noise light received by the fingerprint sensor and the brightness value of the first reflected light, and the noise light refers to light received by the fingerprint sensor when the terminal screen is in a screen-off state;
adjusting the brightness of the terminal screen to a first brightness based on the first light leakage ratio;
And under the condition that the terminal screen is at the first brightness, acquiring second reflected light received by the fingerprint sensor, wherein the second reflected light comprises fingerprint information of the user finger.
According to an aspect of the disclosed embodiments, there is provided a non-transitory computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of the fingerprint identification method described above.
According to an aspect of the disclosed embodiments, there is provided a computer program product comprising computer instructions stored in a computer readable storage medium, from which a processor reads and executes the computer instructions to implement the steps of the above-described fingerprint identification method.
The technical scheme provided by the embodiment of the disclosure can bring the following beneficial effects:
The brightness value of the first reflected light is used for determining a first light leakage ratio, the brightness of a terminal screen is adjusted according to the first light leakage ratio, fingerprint information of a user finger is collected according to the adjusted brightness of the screen, when the fingerprint information is obtained, the brightness of the terminal screen is adjusted, after the screen is aged, the brightness of the screen before being aged can be achieved through brightness adjustment, the influence of the screen aging on fingerprint information collection is reduced, the accuracy of the collected fingerprint information is improved, and the success rate of fingerprint unlocking and fingerprint identification is further improved; and the brightness of the screen is adjusted based on the light leakage ratio, the light leakage ratio is the ratio between the brightness value of noise light and the brightness value of first reflected light, the terminal screen is adjusted according to the overall brightness of the first reflected light as a reference, the brightness change of each pixel point is not required to be determined, the operation is simple and convenient, and the brightness adjustment efficiency of the terminal screen is improved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description, serve to explain the principles of the disclosure.
Fig. 1 is a schematic diagram of a terminal device according to an exemplary embodiment;
FIG. 2 is a flowchart illustrating a method of fingerprint identification, according to an example embodiment;
FIG. 3 schematically illustrates a noisy light and a first reflected light;
FIG. 4 is a schematic diagram illustrating a manner in which a relationship curve is stored during a burn-in test;
FIG. 5 is a schematic diagram illustrating a manner of adjusting brightness of a terminal screen during use;
FIG. 6 is a flowchart illustrating a method of fingerprint identification according to another exemplary embodiment;
FIG. 7 is a block diagram of a fingerprint recognition device, according to an exemplary embodiment;
FIG. 8 is a block diagram of a fingerprint recognition device, according to another exemplary embodiment;
Fig. 9 is a block diagram of an apparatus according to an example embodiment.
Detailed Description
Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary examples are not representative of all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with some aspects of the present disclosure as detailed in the accompanying claims.
According to the technical scheme provided by the embodiment of the disclosure, the execution main body of each step can be a terminal device, such as a mobile phone, a tablet personal computer, a game host, an electronic book reader, a multimedia playing device, a wearable device and other portable electronic devices. Alternatively, a variety of applications such as shopping applications, music applications, information applications, and the like are installed in the terminal device.
As shown in fig. 1, an operating system 11 may be installed and run in a terminal device 10. The operating system 11 is a computer program for managing hardware and software resources of the terminal device 10. In the embodiment of the present disclosure, the kind of the operating system is not limited, such as an Android (Android) operating system, an iOS operating system, a Windows operating system, or other customized operating systems based on the Android operating system, or a self-grinding operating system, etc. In addition, as shown in fig. 1, various applications 12 may be installed and run in the terminal device 10. Alternatively, the application 12 includes an application, such as a shopping application, a reading application, a gaming application, and the like.
In the embodiment of the present disclosure, the terminal device 10 may further include a fingerprint sensor 13 therein. The terminal device 10 collects fingerprint information of a user's finger through the fingerprint sensor 13, and further performs fingerprint identification based on the fingerprint information to determine a user identity corresponding to the fingerprint information.
In some embodiments, the operating system 11 may collect fingerprint information via the fingerprint sensor 13, e.g., collect fingerprint information via the fingerprint sensor, based on which the operating system 11 identifies the user, e.g., unlocks the fingerprint.
In some embodiments, the application 12 may collect fingerprint information via the fingerprint sensor 13, e.g., collect fingerprint information via the fingerprint sensor, and the application 12 may identify the user based on the fingerprint information, thereby determining the user's usage rights with respect to the application 12 based on the user's identity.
Of course, in some embodiments, communication may be between the operating system 11 and the application programs 12.
In the embodiments of the present disclosure, the execution body of each step may be an operating system, and for convenience of description, in the following embodiments, description will be made only with the execution body of each step as a terminal device, except for specific description. The terminal device illustratively comprises a mobile terminal.
Fig. 2 is a flow chart illustrating a fingerprint identification method according to an exemplary embodiment. The method may comprise the following steps (201-204):
Step 201, obtaining a brightness value of first reflected light received by a fingerprint sensor located below a terminal screen.
The first reflected light refers to the reflected light of the terminal screen reflected to the fingerprint sensor by the user's finger. In the embodiment of the disclosure, the terminal device emits light outwards through a terminal screen, a finger of a user serves as a shielding object to reflect the emitted light to a fingerprint sensor below the screen, reflected light received by the fingerprint sensor is determined to be first reflected light, and a brightness value of the first reflected light is obtained. The luminance value of the first reflected light means, for example, an average value of the luminance of each pixel point in the first reflected light.
In some embodiments, a fingerprint sensing area is included in the terminal screen, and when the first reflected light is acquired, a user's finger is placed over the fingerprint sensing area, an emitted light is generated by the fingerprint sensing area, and the emitted light is reflected by the user's fingerprint to generate the first reflected light. The fingerprint sensing area may be located at any position in the terminal screen, which is not limited in the embodiment of the present application. In some embodiments, the finger of the user may be tightly attached to the fingerprint sensing area, or may be attached above the fingerprint sensing area through a transparent barrier (such as a mobile phone film, etc.), or a gap (such as a gap of 0.05mm, a gap of 0.1mm, etc.) may be formed between the finger of the user and the fingerprint sensing area.
Step 202, determining a first light leakage ratio of the terminal screen according to the brightness value of the first reflected light.
In the embodiment of the disclosure, after acquiring the brightness value of the first reflected light, the terminal device determines a first light leakage ratio of the terminal screen according to the brightness value of the first reflected light. The first light leakage ratio is a ratio between a brightness value of noise light received by the fingerprint sensor and a brightness value of first reflected light, and the noise light is light received by the fingerprint sensor when the terminal screen is in a screen off state. Illustratively, as shown in fig. 3, taking an OLED screen as an example, a fingerprint sensor is disposed below the OLED screen, when the OLED screen is in an off-screen state, light P 1 received by the fingerprint sensor is determined as noise light, and when the OLED screen is in a light-emitting state, reflected light P 2 reflected by a user's finger to the fingerprint sensor is determined as first reflected light. For example, the above noise light may also be referred to as light leakage. The above-described light-emitting state may also be referred to as an uninterruptable screen state, for example.
In one possible implementation manner, after the terminal device obtains the first reflected light, the first light leakage ratio is calculated in real time based on the brightness value of the noise light and the brightness value of the first reflected light. In some embodiments, in order to improve the accuracy of the luminance value of the noise light, when the first light leakage ratio is obtained, the terminal device determines the luminance value of the noise light of the terminal screen from the luminance values of the candidate noise lights of different scenes, and further determines the first light leakage ratio of the terminal screen according to the luminance value of the noise light and the luminance value of the first reflected light. In order to improve the efficiency of acquiring the first light leakage ratio, the brightness values of the candidate noise lights of the different scenes refer to data stored in advance by the terminal device. For example, a screen in the same model as the terminal screen is determined as a test sample, and the test sample is subjected to a burn-in test to record the brightness value of candidate noise light of which the terminal screen is in a different scene. In some embodiments, when acquiring the brightness value of the noise light, the terminal device acquires the brightness values of a plurality of candidate noise lights, and different candidate noise lights correspond to different scenes; and then, the terminal equipment acquires the current scene information of the terminal screen, and further determines the brightness value of the candidate noise light corresponding to the scene matched with the current scene information from the brightness values of the candidate noise lights as the brightness value of the noise light of the terminal screen. Wherein, the current scene information includes, but is not limited to, at least one of the following: the use duration of the terminal screen, the time period (such as a day time period, a night time period, etc.) in which the first reflected light is acquired.
In another possible implementation manner, after the terminal device obtains the first reflected light, the terminal device directly obtains a first light leakage ratio corresponding to the first reflected light based on a pre-stored correspondence relationship. In some embodiments, when the first light leakage ratio is obtained, the terminal device obtains a correspondence between a brightness value of the reflected light of the terminal screen and the light leakage ratio, and further determines the light leakage ratio corresponding to the brightness value of the first reflected light from the correspondence between the brightness value of the reflected light and the light leakage ratio, so as to obtain the first light leakage ratio of the terminal screen. In order to improve the efficiency of acquiring the first light leakage ratio, the correspondence between the brightness value of the reflected light of the terminal screen and the light leakage ratio refers to data stored in advance by the terminal device. For example, a screen in the same model as the terminal screen is determined as a test sample, and the test sample is subjected to an aging test to record the correspondence between the brightness value of the reflected light of the terminal screen and the light leakage ratio. It should be noted that, the correspondence between the brightness value of the reflected light and the light leakage ratio may be stored in the terminal device in a curve, a table, or the like, which is not limited in the embodiment of the present application.
And step 203, adjusting the brightness of the terminal screen to the first brightness based on the first light leakage ratio.
In the embodiment of the disclosure, after acquiring the first light leakage ratio, the terminal device adjusts the brightness of the terminal screen to the first brightness based on the first light leakage ratio. The first luminance is illustratively determined according to an initial luminance when the terminal screen is not aged, the first luminance being smaller than the initial luminance and larger than a current luminance of the terminal screen, the current luminance referring to the luminance of the terminal screen when the first reflected light is acquired. For example, the difference between the first brightness and the initial brightness is smaller than a first target value, the first target value may be any value, and the first target value may be flexibly set and adjusted according to the actual situation, which is not limited by the embodiment of the present application.
In some embodiments, the terminal device determines the compensation parameter corresponding to the first light leakage ratio according to a pre-stored correspondence. The compensation parameter is used for adjusting the brightness of the terminal screen. In an exemplary embodiment, the step 203 includes at least one of the following steps:
1. And acquiring a corresponding relation between the light leakage ratio of the terminal screen and a compensation parameter, wherein the compensation parameter is used for adjusting the brightness of the terminal screen.
In some embodiments, in order to improve the efficiency of acquiring the first compensation parameter, the correspondence between the light leakage ratio and the compensation parameter is recorded in advance through an aging test on the terminal screen. Illustratively, a screen which is in the same model as the terminal screen is determined as a test sample, as shown in fig. 4, the screen brightness of the test sample is adjusted, the brightness value of a fingerprint light spot received by a fingerprint sensor is recorded in the process of maintaining the screen brightness, and then the light leakage ratio of the test sample is recorded based on the brightness value of the fingerprint light spot and the brightness value of noise light, and a relation curve between the light leakage ratio and the screen lighting time is stored; and in the process of changing the light leakage ratio, the compensation parameter is debugged so that the brightness of the terminal screen is kept at the first brightness, and a relation curve between the light leakage ratio and the compensation parameter is stored. For example, a relationship curve between the light leakage ratio and the brightness value of the fingerprint light panel may also be stored during the burn-in test.
In the embodiment of the disclosure, the terminal device acquires the corresponding relation between the light leakage ratio of the terminal screen and the compensation parameter from the stored data. The correspondence between the light leakage ratio and the compensation parameter may be stored in the terminal device in a curve, a table, or the like, which is not limited in the embodiment of the present application.
2. And determining a compensation parameter corresponding to the first light leakage ratio from the corresponding relation between the light leakage ratio and the compensation parameter as the first compensation parameter.
In the embodiment of the disclosure, after obtaining the correspondence between the light leakage ratio and the compensation parameter, the terminal device determines the compensation parameter corresponding to the first light leakage ratio as the first compensation parameter of the terminal screen from the correspondence with the first light leakage ratio as a reference.
3. And adjusting the brightness of the terminal screen to the first brightness according to the first compensation parameter.
In the embodiment of the disclosure, after acquiring the first compensation parameter, the terminal device adjusts the brightness of the terminal screen to the first brightness according to the first compensation parameter. As shown in fig. 5, the terminal device obtains the brightness of the first reflected light, determines the first light leakage ratio based on the brightness of the first reflected light, reads the corresponding first compensation parameter through the first light leakage ratio, and performs brightness compensation based on the first compensation parameter.
In some embodiments, the terminal device determines a current adjustment parameter for the terminal screen according to the first compensation parameter, wherein the current adjustment parameter is an adjustment parameter of an input current of a finger to a fingerprint sensing area of the terminal screen; further, the input current of the fingerprint sensing area is adjusted based on the current adjustment parameter, so that the brightness of the fingerprint sensing area reaches the first brightness. The first compensation parameter includes the current adjustment parameter.
Step 204, under the condition that the terminal screen is at the first brightness, obtaining the second reflected light received by the fingerprint sensor.
In the embodiment of the disclosure, after brightness adjustment, the terminal device acquires the second reflected light received by the fingerprint sensor in the case that the terminal screen is at the first brightness. The second reflected light is reflected light of the terminal screen reflected to the fingerprint sensor by the finger of the user at the first brightness. In an embodiment of the disclosure, the second reflected light includes fingerprint information of a user's finger. In some embodiments, after acquiring the second reflected light, the terminal device acquires fingerprint information from the second reflected light, and further performs storage or identification based on the fingerprint information.
In summary, in the technical solution provided in the embodiments of the present disclosure, the first light leakage ratio is determined according to the brightness value of the first reflected light, and then the brightness of the terminal screen is adjusted according to the first light leakage ratio, fingerprint information of the user's finger is collected according to the adjusted brightness of the screen, when the fingerprint information is obtained, the brightness of the terminal screen is adjusted, and after the screen ages, the brightness of the screen before the screen is not aged can be reached through brightness adjustment, so that the influence of the screen aging on the collection of the fingerprint information is reduced, the accuracy of the collected fingerprint information is improved, and then the success rate of fingerprint unlocking and fingerprint identification is improved; and the brightness of the screen is adjusted based on the light leakage ratio, the light leakage ratio is the ratio between the brightness value of noise light and the brightness value of first reflected light, the terminal screen is adjusted according to the overall brightness of the first reflected light as a reference, the brightness change of each pixel point is not required to be determined, the operation is simple and convenient, and the brightness adjustment efficiency of the terminal screen is improved.
In addition, through the corresponding relation between the prestored light leakage ratio and the compensation parameters, the corresponding compensation parameters are directly determined through the light leakage ratio of the terminal screen, so that the acquisition efficiency of the compensation parameters is improved, the brightness of the terminal screen is adjusted based on the compensation parameters, and the brightness adjustment efficiency of the terminal screen is improved; and the current adjustment parameters are determined according to the compensation parameters so as to adjust the current of the fingerprint sensing area in the terminal screen, and the current is directly adjusted without considering the change of each pixel point, so that the brightness adjustment efficiency of the terminal screen is improved, and the fingerprint sensing area is only adjusted, so that the brightness adjustment load of the terminal screen is reduced.
Fig. 6 is a flowchart illustrating a fingerprint recognition method according to another exemplary embodiment. The method may comprise the following steps (601-606):
In step 601, a brightness value of a first reflected light received by a fingerprint sensor located below a terminal screen is obtained.
Step 602, determining a first light leakage ratio of the terminal screen according to the brightness value of the first reflected light.
Step 603, adjusting the brightness of the terminal screen to the first brightness based on the first light leakage ratio.
Step 604, under the condition that the terminal screen is at the first brightness, acquiring the second reflected light received by the fingerprint sensor.
The steps 601-604 are the same as steps 201-204 in the embodiment of fig. 2, and refer specifically to the embodiment of fig. 2, and are not described herein.
In step 605, in the case that fingerprint identification cannot be achieved based on the fingerprint information contained in the second reflected light, the maximum brightness of the terminal screen is determined based on the first brightness.
In some embodiments, after acquiring the second reflected light, the terminal device acquires fingerprint information from the second reflected light, and performs fingerprint identification based on the fingerprint information. And then, under the condition that fingerprint identification cannot be realized through the fingerprint information, determining that the brightness of the terminal screen needs to be continuously adjusted, and further determining the maximum brightness of the terminal screen based on the first brightness. The difference between the first brightness and the maximum brightness is smaller than a second target value, and the second target value can be any value, and can be flexibly set and adjusted according to practical situations, which is not limited by the embodiment of the present application.
In some embodiments, the maximum luminance is greater than the first luminance and less than the initial luminance described above. After the terminal device acquires the first luminance, determining a second luminance based on the second target value and the first luminance, further, determining the second luminance as the maximum luminance when the second luminance is smaller than the initial luminance, and determining the initial luminance as the maximum luminance when the second luminance is larger than the initial luminance.
And step 606, controlling the terminal screen to gradually trend to the maximum brightness from the first brightness, and acquiring third reflected light received by the fingerprint sensor in the brightness adjustment process of the terminal screen until the fingerprint identification is successful.
In the embodiment of the disclosure, after the terminal device obtains the maximum brightness, the terminal device controls the terminal screen to gradually trend to the maximum brightness from the first brightness, and obtains the third reflected light received by the fingerprint sensor in the brightness adjustment process of the terminal screen until the fingerprint identification is successful. The third reflected light is the reflected light containing fingerprint information of the user's finger, which is obtained in the brightness adjustment process. It should be noted that, the process of changing from the first brightness to the maximum brightness is a gradual change process, when the terminal device adjusts the brightness of the terminal screen to a first brightness value between the first brightness and the maximum brightness, the terminal device obtains the third reflected light to perform fingerprint identification, if the fingerprint identification is successful, the brightness adjustment for the terminal screen is stopped, if the fingerprint identification fails, the brightness of the terminal screen is further adjusted to a second brightness value between the first brightness and the maximum brightness, and obtains the new third reflected light to perform fingerprint identification. In some embodiments, in the brightness adjustment process of the terminal screen, the terminal device may continuously obtain the third reflected light based on the uniform time interval until the fingerprint identification is successful.
In some embodiments, the terminal device stores a correspondence between the brightness of the screen and the adjustment parameter, and in the brightness adjustment process of the terminal screen, the adjustment parameter corresponding to the first brightness is used as an initial value, the adjustment parameter corresponding to the maximum brightness is the final value, the adjustment parameter is gradually changed from the initial value to the final value, and the brightness of the terminal screen is adjusted according to the adjustment parameter, so that the brightness of the terminal screen gradually tends to the maximum brightness from the first brightness.
In summary, in the technical scheme provided by the embodiment of the disclosure, when the adjusted screen brightness does not meet the condition of fingerprint identification, the brightness of the terminal screen is continuously adjusted, so that the success rate of fingerprint identification is improved.
The following are device embodiments of the present disclosure that may be used to perform method embodiments of the present disclosure. For details not disclosed in the embodiments of the apparatus of the present disclosure, please refer to the embodiments of the method of the present disclosure.
Fig. 7 is a block diagram illustrating a fingerprint recognition device according to an exemplary embodiment. The device has the function of realizing the fingerprint identification method at the terminal equipment side, and the function can be realized by hardware or by executing corresponding software by the hardware. The device may be a terminal device, and also be provided in the terminal device. The apparatus 700 may include: a brightness acquisition module 710, a light leakage ratio acquisition module 720, a brightness adjustment module 730, and a fingerprint identification module 740.
The brightness acquisition module 710 is configured to acquire a brightness value of first reflected light received by a fingerprint sensor located below a terminal screen, where the first reflected light is reflected by a finger of a user to the fingerprint sensor.
The light leakage ratio obtaining module 720 is configured to determine a first light leakage ratio of the terminal screen according to the brightness value of the first reflected light, where the first light leakage ratio is a ratio between the brightness value of the noise light received by the fingerprint sensor and the brightness value of the first reflected light, and the noise light is light received by the fingerprint sensor when the terminal screen is in a screen off state.
And a brightness adjustment module 730 configured to adjust the brightness of the terminal screen to a first brightness based on the first light leakage ratio.
The fingerprint identification module 740 is configured to obtain second reflected light received by the fingerprint sensor when the terminal screen is at the first brightness, where the second reflected light includes fingerprint information of the user's finger.
In an exemplary embodiment, as shown in fig. 8, the brightness adjustment module 730 includes: a relationship acquisition unit 731, a parameter acquisition unit 732, and a luminance adjustment unit 733.
And a relationship obtaining unit 731 configured to obtain a correspondence relationship between the light leakage ratio of the terminal screen and a compensation parameter for adjusting the brightness of the terminal screen.
And a parameter acquisition unit 732 configured to determine, as a first compensation parameter, a compensation parameter corresponding to the first light leakage ratio from a correspondence relation between the light leakage ratio and the compensation parameter.
And a brightness adjustment unit 733 configured to adjust the brightness of the terminal screen to the first brightness 733 according to the first compensation parameter.
In an exemplary embodiment, the brightness adjustment unit 733 is configured to:
Determining a current adjustment parameter for the terminal screen according to the first compensation parameter, wherein the current adjustment parameter refers to an adjustment parameter of input current for a fingerprint sensing area of the terminal screen;
and adjusting the input current of the fingerprint sensing area based on the current adjustment parameter so as to enable the brightness of the fingerprint sensing area to reach the first brightness.
In an exemplary embodiment, as shown in fig. 8, the light leakage ratio obtaining module 720 includes: a noise acquisition unit 721, and a light leakage ratio determination unit 722.
And a noise acquisition unit 721 configured to determine a luminance value of noise light of the terminal screen from luminance values of candidate noise light of different scenes.
And a light leakage ratio determining unit 722 configured to determine a first light leakage ratio of the terminal screen according to the brightness value of the noise light and the brightness value of the first reflected light.
In an exemplary embodiment, the noise acquisition unit 721 is configured to:
Acquiring brightness values of a plurality of candidate noise lights, wherein different candidate noise lights correspond to different scenes;
Acquiring current scene information of the terminal screen;
And determining the brightness value of the candidate noise light corresponding to the scene matched with the current scene information from the brightness values of the candidate noise light as the brightness value of the noise light of the terminal screen.
In an exemplary embodiment, the light leakage ratio obtaining module 720 is configured to:
acquiring a corresponding relation between a brightness value of reflected light of the terminal screen and a light leakage ratio;
And determining the light leakage ratio corresponding to the brightness value of the first reflected light from the corresponding relation between the brightness value of the reflected light and the light leakage ratio, so as to obtain the first light leakage ratio of the terminal screen.
In an exemplary embodiment, as shown in fig. 8, the apparatus 700 further includes: the brightness determination module 750.
The brightness determining module 750 is configured to determine the maximum brightness of the terminal screen based on the first brightness in a case where fingerprint identification cannot be achieved based on fingerprint information contained in the second reflected light.
The fingerprint recognition module 740 is configured to control the terminal screen to gradually trend from the first brightness to the maximum brightness, and obtain third reflected light received by the fingerprint sensor in the brightness adjustment process of the terminal screen until fingerprint recognition is successful, where the third reflected light is the reflected light containing the fingerprint information of the user finger obtained in the brightness adjustment process.
In summary, in the technical solution provided in the embodiments of the present disclosure, the first light leakage ratio is determined according to the brightness value of the first reflected light, and then the brightness of the terminal screen is adjusted according to the first light leakage ratio, fingerprint information of the user's finger is collected according to the adjusted brightness of the screen, when the fingerprint information is obtained, the brightness of the terminal screen is adjusted, and after the screen ages, the brightness of the screen before the screen is not aged can be reached through brightness adjustment, so that the influence of the screen aging on the collection of the fingerprint information is reduced, the accuracy of the collected fingerprint information is improved, and then the success rate of fingerprint unlocking and fingerprint identification is improved; and the brightness of the screen is adjusted based on the light leakage ratio, the light leakage ratio is the ratio between the brightness value of noise light and the brightness value of first reflected light, the terminal screen is adjusted according to the overall brightness of the first reflected light as a reference, the brightness change of each pixel point is not required to be determined, the operation is simple and convenient, and the brightness adjustment efficiency of the terminal screen is improved.
An exemplary embodiment of the present disclosure further provides a fingerprint identification apparatus, which can implement the fingerprint identification method provided by the present disclosure. The device comprises: a processor, and a memory for storing executable instructions of the processor. Wherein the processor is configured to:
acquiring a brightness value of first reflected light received by a fingerprint sensor positioned below a terminal screen, wherein the first reflected light refers to reflected light of the terminal screen, which is reflected to the fingerprint sensor by a finger of a user;
determining a first light leakage ratio of the terminal screen according to the brightness value of the first reflected light, wherein the first light leakage ratio refers to the ratio between the brightness value of noise light received by the fingerprint sensor and the brightness value of the first reflected light, and the noise light refers to light received by the fingerprint sensor when the terminal screen is in a screen-off state;
adjusting the brightness of the terminal screen to a first brightness based on the first light leakage ratio;
And under the condition that the terminal screen is at the first brightness, acquiring second reflected light received by the fingerprint sensor, wherein the second reflected light comprises fingerprint information of the user finger.
In some possible designs, the processor is further configured to:
Acquiring a corresponding relation between the light leakage ratio of the terminal screen and a compensation parameter, wherein the compensation parameter is used for adjusting the brightness of the terminal screen;
Determining a compensation parameter corresponding to the first light leakage ratio from the corresponding relation between the light leakage ratio and the compensation parameter as a first compensation parameter;
and adjusting the brightness of the terminal screen to the first brightness according to the first compensation parameter.
In some possible designs, the processor is further configured to:
Determining a current adjustment parameter for the terminal screen according to the first compensation parameter, wherein the current adjustment parameter refers to an adjustment parameter of input current for a fingerprint sensing area of the terminal screen;
and adjusting the input current of the fingerprint sensing area based on the current adjustment parameter so as to enable the brightness of the fingerprint sensing area to reach the first brightness.
In some possible designs, the processor is further configured to:
determining the brightness value of the noise light of the terminal screen from the brightness values of the candidate noise light of different scenes;
And determining a first light leakage ratio of the terminal screen according to the brightness value of the noise light and the brightness value of the first reflected light.
In some possible designs, the processor is further configured to:
Acquiring brightness values of a plurality of candidate noise lights, wherein different candidate noise lights correspond to different scenes;
Acquiring current scene information of the terminal screen;
And determining the brightness value of the candidate noise light corresponding to the scene matched with the current scene information from the brightness values of the candidate noise light as the brightness value of the noise light of the terminal screen.
In some possible designs, the processor is further configured to:
acquiring a corresponding relation between a brightness value of reflected light of the terminal screen and a light leakage ratio;
And determining the light leakage ratio corresponding to the brightness value of the first reflected light from the corresponding relation between the brightness value of the reflected light and the light leakage ratio, so as to obtain the first light leakage ratio of the terminal screen.
In some possible designs, the processor is further configured to:
Determining the maximum brightness of the terminal screen based on the first brightness under the condition that fingerprint identification cannot be realized based on the fingerprint information contained in the second reflected light;
And controlling the terminal screen to gradually trend to the maximum brightness from the first brightness, and acquiring third reflected light received by the fingerprint sensor in the brightness adjustment process of the terminal screen until fingerprint identification is successful, wherein the third reflected light is reflected light containing fingerprint information of the user, which is acquired in the brightness adjustment process.
Fig. 9 is a block diagram of an apparatus 900 according to an example embodiment. For example, the apparatus 900 may be a terminal device such as a mobile phone, a tablet computer, a game console, an electronic book reader, a multimedia playing device, a wearable device, and the like.
Referring to fig. 9, apparatus 900 may include one or more of the following components: a processing component 902, a memory 904, a power component 906, a multimedia component 908, an audio component 910, an Input/Output (I/O) interface 912, a sensor component 914, and a communication component 916.
The processing component 902 generally controls overall operations of the apparatus 900, such as operations associated with display, telephone calls, data communications, camera operations, and recording operations. The processing component 902 may include one or more processors 920 to execute instructions to perform all or part of the steps of the methods described above. Further, the processing component 902 can include one or more modules that facilitate interaction between the processing component 902 and other components. For example, the processing component 902 can include a multimedia module to facilitate interaction between the multimedia component 908 and the processing component 902.
The memory 904 is configured to store various types of data to support operations at the apparatus 900. Examples of such data include instructions for any application or method operating on the device 900, contact data, phonebook data, messages, pictures, videos, and the like. The Memory 904 may be implemented by any type or combination of volatile or non-volatile Memory devices, such as Static Random Access Memory (SRAM), electrically erasable programmable Read-Only Memory (EEPROM, ELECTRICALLY ERASABLE PROGRAMMABLE READ ONLY MEMORY), erasable programmable Read-Only Memory (EPROM, ELECTRICAL PROGRAMMABLE READ ONLY MEMORY), programmable Read-Only Memory (PROM, programmable Read-Only Memory), read-Only Memory (ROM), magnetic Memory, flash Memory, magnetic or optical disk.
The power supply component 906 provides power to the various components of the device 900. Power supply components 906 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power for device 900.
The multimedia component 908 comprises a screen between the device 900 and the user that provides an output interface. In some embodiments, the screen may include a Liquid Crystal Display (LCD), a Touch Panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive input signals from a user. The touch panel includes one or more touch sensors to sense touches, swipes, and gestures on the touch panel. The touch sensor may sense not only the boundary of a touch or slide action, but also the duration and pressure associated with the touch or slide operation. In some embodiments, the multimedia component 908 includes a front-facing camera and/or a rear-facing camera. The front-facing camera and/or the rear-facing camera may receive external multimedia data when the apparatus 900 is in an operational mode, such as a photographing mode or a video mode. Each front camera and rear camera may be a fixed optical lens system or have focal length and optical zoom capabilities.
The audio component 910 is configured to output and/or input audio signals. For example, the audio component 910 includes a Microphone (MIC) configured to receive external audio signals when the device 900 is in an operational mode, such as a call mode, a recording mode, and a voice recognition mode. The received audio signals may be further stored in the memory 904 or transmitted via the communication component 916. In some embodiments, the audio component 910 further includes a speaker for outputting audio signals.
The I/O interface 912 provides an interface between the processing component 902 and peripheral interface modules, which may be keyboards, click wheels, buttons, etc. These buttons may include, but are not limited to: homepage button, volume button, start button, and lock button.
The sensor assembly 914 includes one or more sensors for providing status assessment of various aspects of the apparatus 900. For example, the sensor assembly 914 may detect the on/off state of the device 900, the relative positioning of the components, such as the display and keypad of the device 900, the sensor assembly 914 may also detect the change in position of the device 900 or one component of the device 900, the presence or absence of user contact with the device 900, the orientation or acceleration/deceleration of the device 900, and the change in temperature of the device 900. The sensor assembly 914 may include a proximity sensor configured to detect the presence of nearby objects without any physical contact. The sensor assembly 914 may also include a light sensor, such as a Complementary Metal Oxide Semiconductor (CMOS) or image sensor (CCD, charge Coupled Device), for use in imaging applications. In some embodiments, the sensor assembly 914 may also include an acceleration sensor, a gyroscopic sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.
The communication component 916 is configured to facilitate communication between the apparatus 900 and other devices in a wired or wireless manner. The apparatus 900 may access a wireless network based on a communication standard, such as Wi-Fi,2g,3g,4g,5g, or a combination thereof. In one exemplary embodiment, the communication component 916 receives broadcast signals or broadcast-related information from an external broadcast management system via a broadcast channel. In one exemplary embodiment, the Communication component 916 further includes a Near Field Communication (NFC) module to facilitate short range Communication.
In an exemplary embodiment, the apparatus 900 may be implemented by one or more Application Specific Integrated Circuits (ASICs), digital signal processors (DSP, digital Signal Processing), digital signal Processing devices (DSPDs, DIGITAL SIGNAL processors), programmable logic devices (PLDs, programmable logic device), field programmable gate arrays (FPGAs, field Programmable GATE ARRAY), controllers, microcontrollers, microprocessors, or other electronic elements for performing the above-described fingerprint identification methods.
In an exemplary embodiment, a non-transitory computer readable storage medium is also provided, such as a memory 904 comprising a computer program executable by the processor 920 of the apparatus 900 to perform the fingerprint identification method described above. For example, the non-transitory computer readable storage medium may be a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a compact disk Read-Only Memory (CD-ROM, compact disc Read-Only Memory), a magnetic tape, a floppy disk, an optical data storage device, and the like.
In an exemplary embodiment, a computer program product is also provided, the computer program product comprising computer instructions stored in a computer readable storage medium. The processor of the terminal device reads the computer instructions from the computer readable storage medium, and the processor executes the computer instructions, so that the terminal device performs the fingerprint identification method.
It should be understood that references herein to "a plurality" are to two or more. "and/or", describes an association relationship of an association object, and indicates that there may be three relationships, for example, a and/or B, and may indicate: a exists alone, A and B exist together, and B exists alone. The character "/" generally indicates that the context-dependent object is an "or" relationship.
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any adaptations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
It is to be understood that the present disclosure is not limited to the precise arrangements and instrumentalities shown in the drawings, and that various modifications and changes may be effected without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.
Claims (11)
1. A method of fingerprint identification, the method comprising:
acquiring a brightness value of first reflected light received by a fingerprint sensor positioned below a terminal screen, wherein the first reflected light refers to reflected light of the terminal screen, which is reflected to the fingerprint sensor by a finger of a user;
determining a first light leakage ratio of the terminal screen according to the brightness value of the first reflected light, wherein the first light leakage ratio refers to the ratio between the brightness value of noise light received by the fingerprint sensor and the brightness value of the first reflected light, and the noise light refers to light received by the fingerprint sensor when the terminal screen is in a screen-off state;
adjusting the brightness of the terminal screen to a first brightness based on the first light leakage ratio;
And under the condition that the terminal screen is at the first brightness, acquiring second reflected light received by the fingerprint sensor, wherein the second reflected light comprises fingerprint information of the user finger.
2. The method of claim 1, wherein the adjusting the brightness of the terminal screen to a first brightness based on the first light leakage ratio comprises:
Acquiring a corresponding relation between the light leakage ratio of the terminal screen and a compensation parameter, wherein the compensation parameter is used for adjusting the brightness of the terminal screen;
Determining a compensation parameter corresponding to the first light leakage ratio from the corresponding relation between the light leakage ratio and the compensation parameter as a first compensation parameter;
and adjusting the brightness of the terminal screen to the first brightness according to the first compensation parameter.
3. The method of claim 2, wherein said adjusting the brightness of the terminal screen to the first brightness according to the first compensation parameter comprises:
Determining a current adjustment parameter for the terminal screen according to the first compensation parameter, wherein the current adjustment parameter refers to an adjustment parameter of input current for a fingerprint sensing area of the terminal screen;
and adjusting the input current of the fingerprint sensing area based on the current adjustment parameter so as to enable the brightness of the fingerprint sensing area to reach the first brightness.
4. The method of claim 1, wherein determining the first light leakage ratio of the terminal screen based on the brightness value of the first reflected light comprises:
determining the brightness value of the noise light of the terminal screen from the brightness values of the candidate noise light of different scenes;
And determining a first light leakage ratio of the terminal screen according to the brightness value of the noise light and the brightness value of the first reflected light.
5. The method of claim 4, wherein determining the luminance value of the noise light of the terminal screen from the luminance values of the candidate noise light of the different scenes comprises:
Acquiring brightness values of a plurality of candidate noise lights, wherein different candidate noise lights correspond to different scenes;
Acquiring current scene information of the terminal screen;
And determining the brightness value of the candidate noise light corresponding to the scene matched with the current scene information from the brightness values of the candidate noise light as the brightness value of the noise light of the terminal screen.
6. The method of claim 1, wherein determining the first light leakage ratio of the terminal screen based on the brightness value of the first reflected light comprises:
acquiring a corresponding relation between a brightness value of reflected light of the terminal screen and a light leakage ratio;
And determining the light leakage ratio corresponding to the brightness value of the first reflected light from the corresponding relation between the brightness value of the reflected light and the light leakage ratio, so as to obtain the first light leakage ratio of the terminal screen.
7. The method of any one of claims 1 to 6, further comprising, after the acquiring the second reflected light received by the fingerprint sensor:
Determining the maximum brightness of the terminal screen based on the first brightness under the condition that fingerprint identification cannot be realized based on the fingerprint information contained in the second reflected light;
And controlling the terminal screen to gradually trend to the maximum brightness from the first brightness, and acquiring third reflected light received by the fingerprint sensor in the brightness adjustment process of the terminal screen until fingerprint identification is successful, wherein the third reflected light is reflected light containing fingerprint information of the user, which is acquired in the brightness adjustment process.
8. A fingerprint recognition device, the device comprising:
the brightness acquisition module is configured to acquire a brightness value of first reflected light received by a fingerprint sensor positioned below a terminal screen, wherein the first reflected light refers to reflected light of the terminal screen, which is reflected to the fingerprint sensor by a finger of a user;
The light leakage ratio acquisition module is configured to determine a first light leakage ratio of the terminal screen according to the brightness value of the first reflected light, wherein the first light leakage ratio refers to the ratio between the brightness value of noise light received by the fingerprint sensor and the brightness value of the first reflected light, and the noise light refers to light received by the fingerprint sensor when the terminal screen is in a screen-off state;
a brightness adjustment module configured to adjust brightness of the terminal screen to a first brightness based on the first light leakage ratio;
And the fingerprint identification module is configured to acquire second reflected light received by the fingerprint sensor under the condition that the terminal screen is at the first brightness, wherein the second reflected light comprises fingerprint information of the user finger.
9. A fingerprint recognition device, the device comprising:
A processor;
a memory for storing executable instructions of the processor;
Wherein the processor is configured to:
acquiring a brightness value of first reflected light received by a fingerprint sensor positioned below a terminal screen, wherein the first reflected light refers to reflected light of the terminal screen, which is reflected to the fingerprint sensor by a finger of a user;
determining a first light leakage ratio of the terminal screen according to the brightness value of the first reflected light, wherein the first light leakage ratio refers to the ratio between the brightness value of noise light received by the fingerprint sensor and the brightness value of the first reflected light, and the noise light refers to light received by the fingerprint sensor when the terminal screen is in a screen-off state;
adjusting the brightness of the terminal screen to a first brightness based on the first light leakage ratio;
And under the condition that the terminal screen is at the first brightness, acquiring second reflected light received by the fingerprint sensor, wherein the second reflected light comprises fingerprint information of the user finger.
10. A non-transitory computer readable storage medium, on which a computer program is stored, characterized in that the computer program, when being executed by a processor, implements the steps of the method according to any one of claims 1 to 7.
11. A computer program product comprising computer instructions stored in a computer readable storage medium, from which a processor reads and executes the computer instructions to implement the steps of the method according to any of claims 1 to 7.
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| CN202211642509.7A CN118262386A (en) | 2022-12-20 | 2022-12-20 | Fingerprint identification method, fingerprint identification device and storage medium |
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