CN110287842A - fingerprint scanning method and related product - Google Patents

Abstract

The embodiment of the application discloses a fingerprint scanning method and a related product, wherein the fingerprint scanning method is applied to electronic equipment, the electronic equipment comprises a touch screen and a fingerprint sensor, and the method comprises the following steps: detecting whether a preset fingerprint identification area in the electronic equipment is in an open state, wherein the preset fingerprint identification area is an area which is displayed on a touch screen and used for receiving user fingerprint pressing; if the preset fingerprint identification area is determined to be in the opening state, the pressing detection scanning frequency of the fingerprint sensor is increased from the first preset frequency to the second preset frequency, and the fingerprint scanning frequency of the fingerprint sensor is increased from the third preset frequency to the fourth preset frequency. According to the embodiment of the application, when the fingerprint identification area is determined to be in the open state, the pressing detection scanning frequency and the fingerprint scanning frequency are improved, the efficiency of pressing determination and fingerprint scanning is improved, and the efficiency of unlocking the fingerprint under the screen is improved.

Description

Fingerprint scanning method and related products

technical field

The present application relates to the technical field of fingerprint identification, in particular to a fingerprint scanning method and related products.

Background technique

Fingerprint recognition refers to identification by comparing the minutiae points of different fingerprints. Fingerprint recognition technology involves image processing, pattern recognition, computer vision, mathematical morphology, wavelet analysis and many other disciplines. Since each person's fingerprints are different, that is, between the ten fingers of the same person, the fingerprints are also significantly different, so the fingerprints can be used for identification.

Traditional front or rear capacitive fingerprints are always in the state of detection and recognition, but cannot meet the requirements of full screen; the current optical screen fingerprints use a touch screen (TP) as the trigger source of the fingerprint under the screen, which improves the recognition trigger. Speed can effectively optimize the fingerprint unlocking speed. However, when the user's fingerprint is scanned for under-screen fingerprint unlocking, the scanning frequency is low, which makes the fingerprint unlocking efficiency also low, and cannot meet the user's demand for quick unlocking.

SUMMARY OF THE INVENTION

The embodiments of the present application provide a fingerprint scanning method and related products, so as to increase the scanning frequency of pressing detection and the scanning frequency of fingerprints when it is determined that the preset fingerprint identification area is in an open state, improve the efficiency of pressing determination and fingerprint scanning, and further improve the screen The efficiency of fingerprint unlocking.

In a first aspect, an embodiment of the present application provides a fingerprint scanning method, which is applied to an electronic device, where the electronic device includes a touch screen and a fingerprint sensor. The method includes:

Detecting whether a preset fingerprint identification area in the electronic device is in an open state, wherein the preset fingerprint identification area is an area displayed on the touch screen for receiving user fingerprint pressing;

If it is determined that the preset fingerprint recognition area is in an open state, the pressing detection scanning frequency of the fingerprint sensor is increased from the first preset frequency to the second preset frequency, and the fingerprint scanning frequency of the fingerprint sensor is increased from the third preset frequency to the fourth preset frequency.

In a second aspect, an embodiment of the present application provides a fingerprint scanning device, and the fingerprint scanning device includes:

a detection unit, configured to detect whether a preset fingerprint identification area in the electronic device is in an open state, wherein the preset fingerprint identification area is an area displayed on the touch screen for receiving user fingerprint pressing;

The adjustment unit is configured to increase the press detection scanning frequency of the fingerprint sensor from the first preset frequency to the second preset frequency if it is determined that the preset fingerprint identification area is in an open state, and increase the fingerprint scanning frequency of the fingerprint sensor from the first preset frequency to the second preset frequency. The third preset frequency is increased to the fourth preset frequency.

In a third aspect, embodiments of the present application provide an electronic device, including a processor, a memory, a communication interface, and one or more programs, where the one or more programs are stored in the memory and configured by the is executed by the processor, and the program includes instructions for performing the steps in any of the methods of the first aspect.

In a fourth aspect, embodiments of the present application provide a computer-readable storage medium storing a computer program for electronic data exchange, wherein the computer program causes a computer to execute instructions of the steps described in any of the methods in the first aspect.

In a fifth aspect, an embodiment of the present application provides a computer program product, wherein the computer program product includes a non-transitory computer-readable storage medium storing a computer program, and the computer program is operable to cause a computer to execute as implemented in the present application. Examples include some or all of the steps described in any method of the first aspect. The computer program product may be a software installation package.

It can be seen that the fingerprint scanning method and device provided by the embodiments of the present application are applied to electronic equipment, and the electronic equipment includes a touch screen and a fingerprint sensor. When it is detected that the preset fingerprint identification area in the electronic device is in an open state, the pressing detection scanning frequency is increased from the first preset frequency to the second preset frequency, and the fingerprint scanning frequency is increased from the third preset frequency to the fourth preset frequency preset frequency. Since the preset fingerprint recognition area is an area displayed on the touch screen for receiving user fingerprint pressing, increasing the frequency when it is detected that the fingerprint recognition area is in an open state can reduce the power consumption when the fingerprint recognition area is in an off state. Increasing the scanning frequency of pressing detection and the scanning frequency of fingerprints can effectively improve the efficiency of detecting user's pressing operation and the efficiency of fingerprint scanning, thereby effectively improving the efficiency of unlocking fingerprints under the screen.

Description of drawings

The accompanying drawings involved in the embodiments of the present application will be briefly introduced below.

FIG. 1A is a schematic structural diagram of an electronic device provided by an embodiment of the present application;

FIG. 1B is a schematic flowchart of a fingerprint scanning method provided by an embodiment of the present application;

2 is a schematic flowchart of another fingerprint scanning method provided by an embodiment of the present application;

3 is a schematic flowchart of another fingerprint scanning method provided by an embodiment of the present application;

4 is a schematic flowchart of another fingerprint scanning method provided by an embodiment of the present application;

FIG. 5 is a schematic structural diagram of an electronic device provided by an embodiment of the present application;

FIG. 6 is a block diagram of functional units of a fingerprint scanning device provided by an embodiment of the present application.

Detailed ways

In order to make those skilled in the art better understand the solutions of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only It is a part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

The embodiments of the present application will be described in detail below.

Please refer to FIG. 1A . FIG. 1A is a schematic structural diagram of an electronic device provided by an embodiment of the present application. The electronic device 100 includes a touch screen 101, a fingerprint sensor 102, and a fingerprint identification area 103, wherein the touch screen 101 is used to emit light and display the fingerprint identification area 103, and the fingerprint identification area 103 is used to receive user fingerprints to press, notify The user's press and lift operations. In the under-screen fingerprint unlocking, the touch screen actively emits light, so it can be an organic light-emitting diode (Organic Light-Emitting Diode, OLED) screen. In addition, the electronic device 100 has an Idle state and an Active state. When in the Idle state, the touch screen 101 is in a low power consumption mode and only detects whether a press is generated on the screen. If a press is detected, it exits the Idle state and enters the Active state. state. When in the Active state, the touch screen 101 detects all the signals on the screen, and performs the calculation of whether to report the point and the coordinates of the point. The fingerprint sensor 102 is used for pressing detection scanning and fingerprint scanning. The former is used to obtain a pressing image in the Idle state to determine whether there is a pressing operation on the screen, and the latter is used to obtain a fingerprint image and perform fingerprint recognition in the Active state. Wherein, the fingerprint sensor 102 in this embodiment of the present application may be a complementary metal-oxide-semiconductor (Complementary Metal-Oxide-Semiconductor, CMOS) sensor, and the electronic device 100 may include various handheld devices, vehicle-mounted devices, wearable devices with wireless communication functions A device, computing device or other processing device connected to a wireless modem, and various forms of User Equipment (UE), Mobile Station (MS), terminal device, and the like.

The whole process of the fingerprint on the screen is: the user triggers the fingerprint recognition function of the electronic device because of moving or touching the electronic device 100, and turns on the fingerprint recognition module; the touch screen 101 emits light and displays the fingerprint recognition area 103; the electronic device 100 is in the idle state , perform press detection scanning according to the first preset frequency; after confirming the user's pressing operation, the electronic device 100 switches to the Active state, performs fingerprint scanning according to the third preset frequency, and obtains the user's fingerprint image in the fingerprint recognition area 103 . Finally, the fingerprint identification module performs fingerprint identification according to the obtained fingerprint image.

In this process, the touch screen will actively emit light after the fingerprint identification module is triggered, resulting in high energy consumption. In addition, the electronic device 100 may also include a black screen gesture function, and the fingerprint unlocking under the screen adopts a mode shared with the black screen gesture, that is, the two functions are enabled at the same time, and there is also a problem of high power consumption. Therefore, in order to achieve the purpose of balancing power consumption, the fingerprint unlocking under the screen does not achieve the optimal recognition speed, that is, the efficiency of press detection scanning and fingerprint scanning are both low, resulting in low fingerprint recognition efficiency.

In order to optimize the above problems, please refer to FIG. 1B . FIG. 1B is a schematic flowchart of a fingerprint scanning method provided by an embodiment of the present application, which is applied to an electronic device. The electronic device includes a touch screen and a fingerprint sensor. As shown in FIG. 1B , The fingerprint scanning method includes the following steps:

Step 111: Detect whether a preset fingerprint identification area in the electronic device is in an open state, wherein the preset fingerprint identification area is an area displayed on the touch screen for receiving the user's fingerprint pressing.

Specifically, the preset fingerprint recognition area is an area displayed on the touch screen for receiving the user's fingerprint pressing. During the fingerprint unlocking process under the screen, since the touch screen of the electronic device is a full screen, there is no obvious physical key (such as the Home key) to receive the fingerprint press for fingerprint scanning. After that, the touch screen emits light, and a preset fingerprint recognition area is displayed on the touch screen, prompting the user to perform a fingerprint pressing operation in this area.

Step 112: If it is determined that the preset fingerprint identification area is in an open state, increase the scan frequency of the press detection of the fingerprint sensor from the first preset frequency to the second preset frequency, and increase the fingerprint scanning frequency of the fingerprint sensor from the third preset frequency. Set the frequency up to the fourth preset frequency.

Specifically, when the preset fingerprint identification area is in an open state, the fingerprint sensor disposed below the preset fingerprint identification area starts to perform press scanning according to a certain press detection scanning frequency to determine whether there is a press operation on the preset fingerprint identification area. After it is determined that there is a pressing operation, the fingerprint sensor performs fingerprint scanning according to a certain fingerprint scanning frequency to obtain a fingerprint image.

In this process, in order to improve the efficiency of determining whether there is a press operation on the preset fingerprint identification area, the scan frequency of the press detection is increased from the first preset frequency to the second preset frequency, that is, the second preset frequency is greater than the first preset frequency. Set the frequency; in order to improve the efficiency of obtaining fingerprint images, the fingerprint scanning frequency is increased from the third preset frequency to the fourth preset frequency, that is, the fourth preset frequency is greater than the third preset frequency. The first preset frequency and the third preset frequency may be the same, such as 30Hz, 40Hz, etc., or different; the second preset frequency and the fourth preset frequency may be the same, such as 100Hz, 110Hz, etc., or different.

Optionally, after increasing the pressing detection scan frequency from the first preset frequency to the second preset frequency, the method further includes: detecting that the finger of the target object presses the preset fingerprint according to the second preset frequency. Identify the pressing area of the area; determine that the pressing area exceeds a second preset area, wherein the second preset area is smaller than the first preset area, and the first preset area is detected according to the first preset frequency The pressing area that needs to be exceeded by the finger of the target object to press the preset fingerprint recognition area.

Specifically, the press detection scan frequency and the fingerprint scan frequency can be changed synchronously or asynchronously. That is, when it is determined that the preset fingerprint identification area is in an open state, only the pressing detection scanning frequency is increased from the first preset frequency to the second preset frequency, and when it is determined that there is a pressing operation in the preset fingerprint identification area, the fingerprint is scanned again. The frequency is raised from the third frequency to the fourth frequency.

The specific process of determining that there is a pressing operation in the preset fingerprint identification area is: according to the second preset frequency, the finger of the target object is detected to press the pressing area of the preset fingerprint area. Because the second preset frequency is higher than the first preset frequency, it can be Get compression images faster. All valid pressing positions in the pressing image constitute a pressing area, and when the pressing area exceeds the second preset area, it is determined that the preset fingerprint area has a pressing operation. Wherein, the second preset area is smaller than the first preset area, and the first preset area is the pressing area that needs to be exceeded by detecting the finger of the target object pressing the preset fingerprint recognition area according to the scanning frequency of the first preset frequency. For example, the first preset area may be 70% of the preset identification area, and the second preset area may be 50% of the preset identification area. Because when the finger of the target object presses the screen, as the pressing force increases, the area that contacts the preset fingerprint recognition area becomes larger, then when the pressing area in a certain frame of image reaches the second preset area, the predetermined area is determined. It is assumed that there is a pressing operation in the fingerprint pressing area, so that the determination efficiency of the pressing operation can be further improved.

Optionally, the detecting that the finger of the target object presses the pressing area of the preset fingerprint recognition area according to the second preset frequency includes: detecting the pressing image of the target object on the touch screen according to the second preset frequency; Determine the integer number of pixels included in the pressed image, where the integer number of pixels represents the number of pixels whose pixel area is all included in the range of the pressed image; obtain the area corresponding to the integer number of pixels, and determine it as the predetermined number of pixels. Set the pressing area of the fingerprint recognition area.

When the finger of the detection target object presses the pressing area of the preset fingerprint recognition area according to the second preset frequency, firstly, the pressing image of the target object on the touch screen is detected according to the second preset frequency. The higher the detection frequency is, the pressing image is obtained. faster. After one or more pressed images are obtained, the pressed area on the pressed images is determined. Because the finger is curved, the pressing area may not be a regular pattern during pressing, and if there is dirt on the finger pulp, the scanned fingerprint image may be incomplete. Therefore, it is necessary to determine the whole pixel covered by the pressing image. If the pressed image covers only 70% of a pixel A, pixel A is not included in the pressed area, and 100% of the area of pixel B is covered by the pressed image, and pixel B is included in the pressed area. Therefore, the formula for calculating the pressed area is: S ₀ =s ₁ *n, where S ₀ represents the total pressed area, s ₁ represents the area of each pixel, and n represents the number of integer pixels occupied by the pressed image.

It can be seen that, in the embodiment of the present application, the pressing image is obtained by using the second preset frequency, and the second preset frequency is greater than the first preset frequency, which can improve the obtaining efficiency of the pressing image. The pressing area can improve the accuracy of determining the pressing area and reduce the misjudgment rate of the pressing operation. After the pressing area is obtained, it is further determined whether the pressing area exceeds a second preset area, wherein the second preset area is smaller than the first predetermined area that needs to be exceeded by the finger that detects the target object at the first preset frequency to press the preset fingerprint recognition area. By setting the area, the preset area that needs to be determined for the pressing operation is reduced, and the determination efficiency of the pressing operation can be further improved. The method improves the efficiency of pressing operation recognition in the fingerprint recognition under the screen as a whole.

Optionally, the electronic device includes a black screen gesture function, and before detecting whether a preset fingerprint recognition area in the electronic device is in an enabled state, the method further includes: determining that the black screen gesture function of the electronic device is in an enabled state.

The black screen gesture refers to a process in which an electronic device accepts a preset gesture operation to directly enter an application program when the electronic device is in a black screen standby state. The black screen gesture function can bring a lot of convenience to users, and this function and the fingerprint unlocking function under the screen can be shared modes. That is, the fingerprint unlocking and black screen gesture functions are enabled at the same time. The relationship between the two is shown in Table 1:

Table 1 Function switch condition comparison table

switch Trigger (on) Trigger (Off) Under-screen fingerprint unlock set up The sensor receives the signal No signal for a long time black screen gesture set up corresponding gesture close to the body

Only when the under-screen fingerprint unlocking and black screen gesture settings are turned on, can the two functions be triggered to be turned on or off according to various trigger conditions. These two functions can use the shared mode, that is, the two functions are turned on at the same time, but their triggering conditions are different, and they are not affected by each other. You can also use the non-shared mode, you can turn on one of the functions independently.

When the under-screen fingerprint unlocking and the black screen gesture are shared modes, enabling these two functions at the same time consumes a lot of energy. In order to balance the power consumption, the scanning frequency of the under-screen fingerprint unlocking is set lower, for example, the first preset frequency. But this will reduce the efficiency of fingerprint unlocking. If the under-screen fingerprint unlocking and the black screen gesture are in non-shared mode, and the black screen gesture function is disabled, the scanning frequency of the under-screen fingerprint unlocking enabled in this case is not affected by the black screen gesture, for example, it can be directly set to the second preset The frequency is the normal frequency and does not need to be adjusted. Under this premise, when it is detected that the preset fingerprint identification area is turned on, the pressing detection scanning frequency and the fingerprint scanning frequency are increased, and a pre-judgment can be made: it is determined that the black screen gesture function of the electronic device is activated. If the black screen gesture function of the electronic device is enabled, and it is detected that the preset fingerprint recognition area is enabled, it means that the scanning frequency of the original fingerprint sensor is low and needs to be improved.

It can be seen that in the embodiment of the present application, by pre-judging whether the electronic device has the black screen gesture function enabled, and then determining whether the sensor scanning frequency (including the pressing detection scanning frequency and the fingerprint scanning frequency) of the electronic device needs to be increased, the frequency adjustment can be further improved. performance and effectiveness, and reduce the energy consumption of detecting the preset fingerprint identification area without adjustment.

Optionally, after increasing the fingerprint scanning frequency from the third preset frequency to the fourth preset frequency, the method further includes: acquiring at least one fingerprint image of the target object according to the fourth preset frequency; Perform image quality evaluation on at least one fingerprint image to obtain at least one evaluation value; select K evaluation values with the largest evaluation value from the at least one evaluation value to obtain K target evaluation values; obtain the corresponding K target evaluation values. K target fingerprint images are used as target fingerprint images to obtain K target fingerprint images; feature extraction is performed on the K target fingerprint images to obtain at least one feature point set, wherein each target fingerprint image corresponds to a feature point set; Each feature point set in the at least one feature point set is matched with the feature point set of the preset fingerprint template to obtain at least one matching value; when the maximum value in the at least one matching value is greater than the preset threshold, confirm The fingerprint image is verified successfully.

Specifically, after the fingerprint scanning frequency is increased, multiple fingerprint images of the target object are obtained. Because the fingerprint images may be unclear due to uneven force, sweaty fingers, stains, injuries, etc., it is necessary to scan the fingerprint images. Quality screening. In the embodiment of the present application, the screening is completed through image quality evaluation. The preset evaluation value may be system default or set by the user, and the preset threshold may be system default or set by the user, which is not limited here; the electronic device may perform image quality evaluation on at least one fingerprint image. Image quality evaluation is performed on each fingerprint image in the at least one fingerprint image by using an image quality evaluation index to obtain at least one image quality evaluation value. The image quality evaluation index may include at least one of the following: average gray level, mean square error, entropy, edge Retention, signal-to-noise ratio, etc., can be defined as the larger the image quality evaluation value, the better the image quality.

Further, the preset fingerprint template can be set by the user or by default by the system, and can be the fingerprint images of different regions of the user's different fingers collected by the electronic device, and the K evaluation values with the largest evaluation values can be selected from the above at least one evaluation value. , and obtain K target evaluation values. Wherein, the determination of the K value can be a fixed percentage of the total evaluation value, for example, at least one evaluation value is M evaluation values, and the fixed percentage is P, then K=M*P; Set the number of evaluation thresholds to be determined. Obtain the fingerprint images corresponding to the K target evaluation values as the target fingerprint image, so that at least one high-quality target fingerprint image can be obtained, and feature extraction is performed on the above at least one target fingerprint image, and the feature can include finger surface ridges and valley information, etc., which are not limited here, in this way, at least one feature point set can be obtained, wherein each target fingerprint image corresponds to a feature point set, and each feature point set in the above at least one feature point set is combined with the predetermined feature point set. Set the feature point set of the fingerprint template to be matched to obtain at least one matching value. Finally, when the maximum value of the at least one matching value is greater than the preset threshold, it can be confirmed that the fingerprint image has been successfully verified. In this way, the fingerprint image is completed. verify.

The method for feature extraction may include at least one of the following: Speeded Up Robust Feature (SURF), Scale Invariant Feature Transform (SIFT), and Features from Accelerated Segment Test (Features from Accelerated Segment Test, FAST), Harris corner method, etc., which are not limited here.

It can be seen that, in the embodiment of the present application, when it is detected that the preset fingerprint identification area in the electronic device is in an open state, the pressing detection scanning frequency is increased from the first preset frequency to the second preset frequency, and the fingerprint scanning frequency is increased from The third preset frequency is increased to the fourth preset frequency. Since the preset fingerprint recognition area is an area displayed on the touch screen for receiving user fingerprint pressing, increasing the frequency when it is detected that the fingerprint recognition area is in an open state can reduce the power consumption when the fingerprint recognition area is in an off state. Increasing the scanning frequency of pressing detection and the scanning frequency of fingerprints can effectively improve the efficiency of detecting user's pressing operation and the efficiency of fingerprint scanning, thereby effectively improving the efficiency of unlocking fingerprints under the screen.

Please refer to FIG. 2. FIG. 2 is a schematic flowchart of another fingerprint scanning method provided by an embodiment of the present application. As shown in FIG. 2, the fingerprint scanning method includes the following steps:

Step 201 , detecting whether a preset fingerprint identification area in the electronic device is in an open state, wherein the preset fingerprint identification area is an area displayed on the touch screen for receiving user fingerprint pressing;

Step 202, if it is determined that the preset fingerprint identification area is in an open state, increase the scan frequency for press detection from a first preset frequency to a second preset frequency;

Step 203: Detect the pressing image of the target object on the touch screen according to the second preset frequency;

Step 204: Determine the number of integer pixels included in the pressed image, where the integer number of pixels represents the number of pixels that are all included in the range of the pressed image in the pixel region;

Step 205: Obtain the area corresponding to the integer number of pixels, and determine it as the pressing area of the preset fingerprint identification area;

Step 206: Determine that the pressing area exceeds a second preset area, wherein the second preset area is smaller than the first preset area, and the first preset area is the size of the target object detected according to the first preset frequency. The pressing area that needs to be exceeded by the finger pressing the preset fingerprint identification area;

Step 207 , increasing the fingerprint scanning frequency from the third preset frequency to the fourth preset frequency.

The specific description of the above steps 201 to 207 may refer to the corresponding description of the fingerprint scanning method described in the steps 111 to 112, which will not be repeated here.

In the embodiment of the present application, the pressing image is obtained by using the second preset frequency, and the second preset frequency is greater than the first preset frequency, which can improve the obtaining efficiency of the pressing image, determine the integer number of pixels included in the pressing image, and determine the pressing area. , which can improve the accuracy of determining the pressing area and reduce the misjudgment rate of determining the pressing operation. After the pressing area is obtained, it is further determined whether the pressing area exceeds a second preset area, wherein the second preset area is smaller than the first predetermined area that needs to be exceeded by the finger that detects the target object at the first preset frequency to press the preset fingerprint recognition area. By setting the area, the preset area that needs to be determined for the pressing operation is reduced, and the determination efficiency of the pressing operation can be further improved. The method improves the efficiency of pressing operation recognition in the fingerprint recognition under the screen as a whole.

Please refer to FIG. 3. FIG. 3 is a schematic flowchart of another fingerprint scanning method provided by an embodiment of the present application. As shown in FIG. 3, the fingerprint scanning method includes the following steps:

Step 301, determining that the black screen gesture function of the electronic device is in an enabled state;

Step 302 , detecting whether a preset fingerprint identification area in the electronic device is in an open state, wherein the preset fingerprint identification area is an area displayed on the touch screen for receiving the user's fingerprint pressing;

Step 303: If it is determined that the preset fingerprint recognition area is in an open state, increase the scan frequency of the press detection of the fingerprint sensor from the first preset frequency to the second preset frequency, and increase the fingerprint scanning frequency of the fingerprint sensor from the third preset frequency. Set the frequency up to the fourth preset frequency.

The specific description of the above steps 301 to 303 may refer to the corresponding description of the fingerprint scanning method described in the steps 111 to 112, which will not be repeated here.

In the embodiment of the present application, by pre-judging whether the electronic device enables the black screen gesture function, and then determining whether the sensor scanning frequency (including the pressing detection scanning frequency and the fingerprint scanning frequency) of the electronic device needs to be increased, the pertinence and the frequency adjustment can be further improved. Effectiveness, reduce the energy consumption of the preset fingerprint identification area detection without adjustment.

Please refer to FIG. 4. FIG. 4 is a schematic flowchart of another fingerprint scanning method provided by an embodiment of the present application. As shown in FIG. 4, the fingerprint scanning method includes the following steps:

Step 401: Detect whether a preset fingerprint identification area in the electronic device is in an open state, wherein the preset fingerprint identification area is an area displayed on the touch screen for receiving user fingerprint pressing;

Step 402: If it is determined that the preset fingerprint identification area is in an open state, increase the pressing detection scanning frequency from the first preset frequency to the second preset frequency, and increase the fingerprint scanning frequency from the third preset frequency to the fourth preset frequency. preset frequency;

Step 403: Acquire at least one fingerprint image of the target object according to a fourth preset frequency;

Step 404: Perform image quality evaluation on the at least one fingerprint image to obtain at least one evaluation value;

Step 405: Select the K evaluation values with the largest evaluation value from the at least one evaluation value to obtain K target evaluation values;

Step 406: Obtain K target fingerprint images corresponding to the K target evaluation values as target fingerprint images, and obtain K target fingerprint images;

Step 407, perform feature extraction on the K target fingerprint images to obtain at least one feature point set, wherein each target fingerprint image corresponds to a feature point set;

Step 408: Match each feature point set in the at least one feature point set with the feature point set of the preset fingerprint template to obtain at least one matching value;

Step 409: When the maximum value of the at least one matching value is greater than a preset threshold, confirm that the fingerprint image is successfully verified.

For the specific description of the above steps 401 to 409, reference may be made to the corresponding description of the fingerprint scanning method described in the steps 111 to 112, which will not be repeated here.

In the embodiment of the present application, the resolution of the displayed content is increased by using the double-tri-interpolation method, and display images with increasing resolutions are sequentially displayed in multiple display layers from top to bottom, which can effectively increase the clarity of the content information being displayed. Spend.

Consistent with the above, please refer to FIG. 5 , which is a schematic structural diagram of an electronic device provided by an embodiment of the present application. As shown in FIG. 5 , the electronic device includes a processor 501 , a memory 502 , a communication interface 503 , a plurality of A display layer 504 and one or more programs 505, wherein the one or more programs are stored in the memory 502 and configured to be executed by the processor, the programs comprising instructions for performing the following steps:

Detecting whether a preset fingerprint identification area in the electronic device is in an open state, wherein the preset fingerprint identification area is an area displayed on the touch screen for receiving user fingerprint pressing;

If it is determined that the preset fingerprint recognition area is in an open state, the pressing detection scanning frequency of the fingerprint sensor is increased from the first preset frequency to the second preset frequency, and the fingerprint scanning frequency of the fingerprint sensor is increased from the third preset frequency to the fourth preset frequency.

It can be seen that, in the embodiment of the present application, when the electronic device detects that the preset fingerprint identification area in the electronic device is in an open state, the scan frequency of the press detection is increased from the first preset frequency to the second preset frequency, and the fingerprint identification area is increased from the first preset frequency to the second preset frequency. The scanning frequency is increased from the third preset frequency to the fourth preset frequency. Since the preset fingerprint recognition area is an area displayed on the touch screen for receiving user fingerprint pressing, increasing the frequency when it is detected that the fingerprint recognition area is in an open state can reduce the power consumption when the fingerprint recognition area is in an off state. Increasing the scanning frequency of pressing detection and the scanning frequency of fingerprints can effectively improve the efficiency of detecting user's pressing operation and the efficiency of fingerprint scanning, thereby effectively improving the efficiency of unlocking fingerprints under the screen.

In a possible example, after the press detection scan frequency is increased from the first preset frequency to the second preset frequency, the above program further includes instructions for performing the following steps:

Detecting that the finger of the target object presses the pressing area of the preset fingerprint recognition area according to the second preset frequency;

It is determined that the pressing area exceeds a second preset area, wherein the second preset area is smaller than the first preset area, and the first preset area is the area where the finger pressing of the target object is detected according to the first preset frequency. The pressing area that the preset fingerprint recognition area needs to exceed.

In a possible example, the electronic device includes a black screen gesture function, and before detecting whether the preset fingerprint recognition area in the electronic device is in an open state, the above program further includes instructions for performing the following steps:

It is determined that the black screen gesture function of the electronic device is enabled.

In a possible example, in terms of detecting the finger of the target object pressing the pressing area of the preset fingerprint recognition area according to the second preset frequency, the instructions in the program are specifically used to perform the following operations:

Detecting the pressed image of the target object on the touch screen according to the second preset frequency;

Determining the number of integer pixels included in the pressed image, where the integer number of pixels represents the number of pixels whose entire pixel area is included in the range of the pressed image;

The area corresponding to the whole number of pixels is acquired, and determined as the pressing area of the preset fingerprint identification area.

In a possible example, after the fingerprint scanning frequency is increased from the third preset frequency to the fourth preset frequency, the above program further includes an instruction for performing the following steps:

Acquiring at least one fingerprint image of the target object according to a fourth preset frequency;

Perform image quality evaluation on the at least one fingerprint image to obtain at least one evaluation value;

Selecting K evaluation values with the largest evaluation value from the at least one evaluation value to obtain K target evaluation values;

Obtaining K target fingerprint images corresponding to the K target evaluation values as target fingerprint images, and obtaining K target fingerprint images;

Perform feature extraction on the K target fingerprint images to obtain at least one feature point set, wherein each target fingerprint image corresponds to a feature point set;

Matching each feature point set in the at least one feature point set with the feature point set of the preset fingerprint template to obtain at least one matching value;

When the maximum value of the at least one matching value is greater than a preset threshold, it is confirmed that the fingerprint image is successfully verified.

The foregoing mainly introduces the solutions of the embodiments of the present application from the perspective of the method-side execution process. It can be understood that, in order to realize the above-mentioned functions, the electronic device includes corresponding hardware structures and/or software modules for executing each function. Those skilled in the art should easily realize that the present application can be implemented in hardware or in the form of a combination of hardware and computer software, in combination with the units and algorithm steps of each example described in the embodiments provided herein. Whether a function is performed by hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Skilled artisans may implement the described functionality using different methods for each particular application, but such implementations should not be considered beyond the scope of this application.

In this embodiment of the present application, the electronic device may be divided into functional units according to the foregoing method examples. For example, each functional unit may be divided corresponding to each function, or two or more functions may be integrated into one processing unit. The above-mentioned integrated units may be implemented in the form of hardware, or may be implemented in the form of software functional units. It should be noted that the division of units in the embodiments of the present application is schematic, and is only a logical function division, and other division methods may be used in actual implementation.

FIG. 6 is a block diagram of functional units of the fingerprint scanning device 600 involved in the embodiment of the present application. The fingerprint scanning device 600 is applied to electronic equipment, and the fingerprint scanning device 600 includes:

A detection unit 601, configured to detect whether a preset fingerprint identification area in the electronic device is in an open state, wherein the preset fingerprint identification area is an area displayed on the touch screen for receiving user fingerprint pressing;

The adjustment unit 602 is configured to increase the press detection scanning frequency of the fingerprint sensor from the first preset frequency to the second preset frequency if it is determined that the preset fingerprint identification area is in an open state, and increase the fingerprint scanning frequency of the fingerprint sensor from the first preset frequency to the second preset frequency. The third preset frequency is increased to the fourth preset frequency.

It can be seen that, in the embodiment of the present application, the fingerprint scanning device is applied to an electronic device, and the electronic device includes a touch screen and a fingerprint sensor. When the fingerprint scanning device detects that the preset fingerprint identification area in the electronic device is in an open state, the pressing detection scanning frequency is increased from the first preset frequency to the second preset frequency, and the fingerprint scanning frequency is increased from the third preset frequency. to the fourth preset frequency. Since the preset fingerprint recognition area is an area displayed on the touch screen for receiving user fingerprint pressing, increasing the frequency when it is detected that the fingerprint recognition area is in an open state can reduce the power consumption when the fingerprint recognition area is in an off state. Increasing the scanning frequency of pressing detection and the scanning frequency of fingerprints can effectively improve the efficiency of detecting user's pressing operation and the efficiency of fingerprint scanning, thereby effectively improving the efficiency of unlocking fingerprints under the screen.

In a possible example, the fingerprint scanning device further includes a determining unit 603, and after increasing the pressing detection scan frequency from the first preset frequency to the second preset frequency, the determining unit 603 is configured to:

Detecting that the finger of the target object presses the pressing area of the preset fingerprint recognition area according to the second preset frequency;

It is determined that the pressing area exceeds a second preset area, wherein the second preset area is smaller than the first preset area, and the first preset area is the area where the finger pressing of the target object is detected according to the first preset frequency. The pressing area that the preset fingerprint recognition area needs to exceed.

In a possible example, the electronic device includes a black screen gesture function, and before detecting whether a preset fingerprint recognition area in the electronic device is in an open state, the detection unit is further configured to:

It is determined that the black screen gesture function of the electronic device is enabled.

In a possible example, in terms of detecting the pressing area of the predetermined fingerprint identification area pressed by the finger of the target object according to the second predetermined frequency, the determining unit 603 is specifically configured to:

Detecting the pressed image of the target object on the touch screen according to the second preset frequency;

Determining the number of integer pixels included in the pressed image, where the integer number of pixels represents the number of pixels whose entire pixel area is included in the range of the pressed image;

The area corresponding to the whole number of pixels is acquired, and determined as the pressing area of the preset fingerprint identification area.

In a possible example, after increasing the fingerprint scanning frequency from the third preset frequency to the fourth preset frequency, the adjusting unit 602 is further configured to:

Acquiring at least one fingerprint image of the target object according to a fourth preset frequency;

Perform image quality evaluation on the at least one fingerprint image to obtain at least one evaluation value;

Selecting K evaluation values with the largest evaluation value from the at least one evaluation value to obtain K target evaluation values;

Obtaining K target fingerprint images corresponding to the K target evaluation values as target fingerprint images, and obtaining K target fingerprint images;

Perform feature extraction on the K target fingerprint images to obtain at least one feature point set, wherein each target fingerprint image corresponds to a feature point set;

Matching each feature point set in the at least one feature point set with the feature point set of the preset fingerprint template to obtain at least one matching value;

When the maximum value of the at least one matching value is greater than a preset threshold, it is confirmed that the fingerprint image is successfully verified.

Embodiments of the present application further provide a computer storage medium, wherein the computer storage medium stores a computer program for electronic data exchange, and the computer program causes the computer to execute part or all of the steps of any method described in the above method embodiments , the above computer includes a mobile terminal.

Embodiments of the present application further provide a computer program product, where the computer program product includes a non-transitory computer-readable storage medium storing a computer program, and the computer program is operable to cause a computer to execute any one of the method embodiments described above. some or all of the steps of the method. The computer program product may be a software installation package, and the above-mentioned computer includes a mobile terminal.

It should be noted that, for the sake of simple description, the foregoing method embodiments are all expressed as a series of action combinations, but those skilled in the art should know that the present application is not limited by the described action sequence. Because in accordance with the present application, certain steps may be performed in other orders or concurrently. Secondly, those skilled in the art should also know that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the present application.

In the above-mentioned embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference may be made to the relevant descriptions of other embodiments.

In the several embodiments provided in this application, it should be understood that the disclosed apparatus may be implemented in other manners. For example, the device embodiments described above are only illustrative. For example, the division of the above-mentioned units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated. to another system, or some features can be ignored, or not implemented. On the other hand, the shown or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, indirect coupling or communication connection of devices or units, and may be in electrical or other forms.

The units described above as separate components may or may not be physically separated, and components shown as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution in this embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit. The above-mentioned integrated units may be implemented in the form of hardware, or may be implemented in the form of software functional units.

If the above-mentioned integrated units are implemented in the form of software functional units and sold or used as independent products, they may be stored in a computer-readable memory. Based on this understanding, the technical solution of the present application can be embodied in the form of a software product in essence, or the part that contributes to the prior art, or all or part of the technical solution, and the computer software product is stored in a memory, Several instructions are included to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the above-mentioned methods in the various embodiments of the present application. The aforementioned memory includes: U disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), mobile hard disk, magnetic disk or optical disk and other media that can store program codes.

Those skilled in the art can understand that all or part of the steps in the various methods of the above embodiments can be completed by instructing relevant hardware through a program, and the program can be stored in a computer-readable memory, and the memory can include: a flash disk , ROM, RAM, disk or CD, etc.

The embodiments of the present application have been introduced in detail above, and the principles and implementations of the present application are described in this paper by using specific examples. The descriptions of the above embodiments are only used to help understand the methods and core ideas of the present application; at the same time, for Persons of ordinary skill in the art, based on the idea of the present application, will have changes in the specific implementation manner and application scope. In summary, the contents of this specification should not be construed as limitations on the present application.

Claims (10)

1. A fingerprint scanning method, characterized in that, applied to an electronic device, the electronic device comprising a touch screen and a fingerprint sensor, the method comprising: Detecting whether a preset fingerprint identification area in the electronic device is in an open state, wherein the preset fingerprint identification area is an area displayed on the touch screen for receiving user fingerprint pressing; If it is determined that the preset fingerprint recognition area is in an open state, the pressing detection scanning frequency of the fingerprint sensor is increased from the first preset frequency to the second preset frequency, and the fingerprint scanning frequency of the fingerprint sensor is increased from the third preset frequency to the fourth preset frequency. 2 . The method according to claim 1 , wherein after increasing the press detection scan frequency from the first preset frequency to the second preset frequency, the method further comprises: 2 . Detecting that the finger of the target object presses the pressing area of the preset fingerprint recognition area according to the second preset frequency; It is determined that the pressing area exceeds a second preset area, wherein the second preset area is smaller than the first preset area, and the first preset area is the area where the finger pressing of the target object is detected according to the first preset frequency. The pressing area that the preset fingerprint recognition area needs to exceed. 3. The method according to claim 1 or 2, wherein the electronic device includes a black screen gesture function, and before detecting whether a preset fingerprint recognition area in the electronic device is in an open state, the method further comprises: It is determined that the black screen gesture function of the electronic device is enabled. 4 . The method according to claim 3 , wherein the detecting that the finger of the target object presses the pressing area of the preset fingerprint recognition area according to the second preset frequency comprises: 4 . Detecting the pressed image of the target object on the touch screen according to the second preset frequency; Determining the number of integer pixels included in the pressed image, where the integer number of pixels represents the number of pixels whose entire pixel area is included in the range of the pressed image; The area corresponding to the whole number of pixels is acquired, and determined as the pressing area of the preset fingerprint identification area. 5. The method according to claim 4, wherein after increasing the fingerprint scanning frequency from the third preset frequency to the fourth preset frequency, the method further comprises: Acquiring at least one fingerprint image of the target object according to a fourth preset frequency; Perform image quality evaluation on the at least one fingerprint image to obtain at least one evaluation value; Selecting K evaluation values with the largest evaluation value from the at least one evaluation value to obtain K target evaluation values; Obtaining K target fingerprint images corresponding to the K target evaluation values as target fingerprint images, and obtaining K target fingerprint images; Perform feature extraction on the K target fingerprint images to obtain at least one feature point set, wherein each target fingerprint image corresponds to a feature point set; Matching each feature point set in the at least one feature point set with the feature point set of the preset fingerprint template to obtain at least one matching value; When the maximum value of the at least one matching value is greater than a preset threshold, it is confirmed that the fingerprint image is successfully verified. 6. A fingerprint scanning device, wherein the fingerprint scanning device comprises: a detection unit, configured to detect whether a preset fingerprint identification area in the electronic device is in an open state, wherein the preset fingerprint identification area is an area displayed on the touch screen for receiving user fingerprint pressing; The adjustment unit is configured to increase the press detection scanning frequency of the fingerprint sensor from the first preset frequency to the second preset frequency if it is determined that the preset fingerprint identification area is in an open state, and increase the fingerprint scanning frequency of the fingerprint sensor from the first preset frequency to the second preset frequency. The third preset frequency is increased to the fourth preset frequency. 7 . The device according to claim 6 , wherein the fingerprint scanning device further comprises a determining unit, after increasing the pressing detection scan frequency from the first preset frequency to the second preset frequency, the determining unit Used for: Detecting that the finger of the target object presses the pressing area of the preset fingerprint recognition area according to the second preset frequency; It is determined that the pressing area exceeds a second preset area, wherein the second preset area is smaller than the first preset area, and the first preset area is the area where the finger pressing of the target object is detected according to the first preset frequency. The pressing area that the preset fingerprint recognition area needs to exceed. 8. The device according to claim 6 or 7, wherein the electronic device includes a black screen gesture function, and before detecting whether a preset fingerprint recognition area in the electronic device is in an open state, the detection unit is further used for : It is determined that the black screen gesture function of the electronic device is enabled. 9. An electronic device comprising a processor, a memory, a communication interface, and one or more programs, the one or more programs being stored in the memory and configured by the processor Executing, the program includes instructions for performing the steps in the method of any of claims 1-5. 10. A computer-readable storage medium, characterized by storing a computer program for electronic data exchange, wherein the computer program causes a computer to perform the method according to any one of claims 1-5.