CN110287842B - Fingerprint scanning method and related product - Google Patents
Fingerprint scanning method and related product Download PDFInfo
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- CN110287842B CN110287842B CN201910523822.0A CN201910523822A CN110287842B CN 110287842 B CN110287842 B CN 110287842B CN 201910523822 A CN201910523822 A CN 201910523822A CN 110287842 B CN110287842 B CN 110287842B
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/26—Power supply means, e.g. regulation thereof
- G06F1/32—Means for saving power
- G06F1/3203—Power management, i.e. event-based initiation of a power-saving mode
- G06F1/3234—Power saving characterised by the action undertaken
- G06F1/325—Power saving in peripheral device
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0412—Digitisers structurally integrated in a display
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0416—Control or interface arrangements specially adapted for digitisers
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
- G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
- G06V40/12—Fingerprints or palmprints
- G06V40/13—Sensors therefor
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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
Technical Field
The present application relates to the field of fingerprint identification technology, and in particular, to a fingerprint scanning method and related products.
Background
Fingerprint identification refers to identification by comparing minutiae of different fingerprints. Fingerprint identification technology relates to a plurality of subjects such as image processing, pattern recognition, computer vision, mathematical morphology, wavelet analysis and the like. The fingerprints of each person are different, namely the fingerprints are obviously different among the ten fingers of the same person, so that the fingerprints can be used for identity authentication.
The traditional front-mounted or rear-mounted capacitive fingerprint is always in a detection and identification state, but cannot meet the requirements of a comprehensive screen; in the current optical screen lower fingerprint, a touch screen (TP) is used as a trigger source of the optical screen lower fingerprint, so that the fingerprint unlocking speed can be effectively optimized by increasing the identification trigger speed. However, when the fingerprint of the user is scanned, the scanning frequency is low, so that the efficiency of fingerprint unlocking is low, and the requirement of quick unlocking by the user cannot be met.
Disclosure of Invention
The embodiment of the application provides a fingerprint scanning method and a related product, so that when a preset fingerprint identification area is determined to be in an open state, the pressing detection scanning frequency and the fingerprint scanning frequency are improved, the pressing determination and fingerprint scanning efficiency is improved, and the efficiency of unlocking fingerprints under a screen is improved.
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, and the method includes:
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.
In a second aspect, an embodiment of the present application provides a fingerprint scanning device, including:
the detection unit is used for detecting whether a preset fingerprint identification area in the electronic equipment is in an open state or not, wherein the preset fingerprint identification area is an area which is displayed on the touch screen and used for receiving user fingerprint pressing;
and the adjusting unit is used for increasing the pressing detection scanning frequency of the fingerprint sensor from a first preset frequency to a second preset frequency and increasing the fingerprint scanning frequency of the fingerprint sensor from a third preset frequency to a fourth preset frequency if the preset fingerprint identification area is determined to be in an open state.
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, stored in the memory and configured to be executed by the processor, the programs including instructions for performing the steps of any of the methods of the first aspect.
In a fourth aspect, the present application provides a computer-readable storage medium storing a computer program for electronic data exchange, wherein the computer program causes a computer to execute the instructions of the steps of the method in the first aspect.
In a fifth aspect, 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 perform some or all of the steps as described in any one of the methods of the first aspect of the embodiments of the present application. The computer program product may be a software installation package.
It can be seen that the fingerprint scanning method and apparatus provided in the embodiment of the present application are applied to an electronic device, and the electronic device includes a touch screen and a fingerprint sensor. When detecting that a preset fingerprint identification area in the electronic equipment is in an open state, the pressing detection scanning frequency is increased from a first preset frequency to a second preset frequency, and the fingerprint scanning frequency is increased from a third preset frequency to a fourth preset frequency. Because predetermine the fingerprint identification area and be used for receiving the region that the user's fingerprint pressed on the touch screen for showing, improve the frequency when detecting that the fingerprint identification area is in the open mode then, can reduce the consumption when the fingerprint identification area is in the closed mode. The efficiency of detecting the user and pressing the operation and the efficiency of fingerprint scanning can effectively be promoted to the promotion and press detection scanning frequency and fingerprint scanning frequency, and then fingerprint unblock efficiency under the effective promotion screen.
Drawings
Reference will now be made in brief to the accompanying drawings, to which embodiments of the present application relate.
Fig. 1A is a schematic structural diagram of an electronic device according to an embodiment of the present disclosure;
fig. 1B is a schematic flowchart of a fingerprint scanning method according to an embodiment of the present disclosure;
FIG. 2 is a schematic flowchart of another fingerprint scanning method provided in the embodiments of the present application;
FIG. 3 is a schematic flowchart of another fingerprint scanning method provided in the embodiments of the present application;
FIG. 4 is a schematic flowchart of another fingerprint scanning method provided in the embodiments of the present application;
fig. 5 is a schematic structural diagram of an electronic device according to an embodiment of the present disclosure;
fig. 6 is a block diagram illustrating functional units of a fingerprint scanning apparatus according to an embodiment of the present disclosure.
Detailed Description
In order to make the technical solutions of the present application better understood, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The following describes embodiments of the present application in detail.
Referring to fig. 1A, fig. 1A is a schematic structural diagram of an electronic device according to an embodiment of the present disclosure. The electronic device 100 comprises a touch screen 101, a fingerprint sensor 102 and a fingerprint identification area 103, wherein the touch screen 101 is used for emitting light and displaying the fingerprint identification area 103, and the fingerprint identification area 103 is used for receiving a user fingerprint press and informing the user of the press and lift operations. In the under-screen fingerprint unlocking, the touch screen actively emits Light, and thus can be an Organic Light-Emitting Diode (OLED) screen. In addition, the electronic device 100 has an Idle state and an Active state, and when the Idle state is present, the touch screen 101 is in a low power consumption mode, and only detects whether a press is generated on the screen, and if the press is detected, the Idle state is exited and the Active state is entered. When the touch screen is in the Active state, the touch screen 101 detects all signals on the screen, and performs operations of reporting points and reporting point coordinates. The fingerprint sensor 102 is used for performing a press detection scan for obtaining a press image in the Idle state and determining whether there is a press operation on the screen, and a fingerprint scan for obtaining a fingerprint image in the Active state and performing fingerprint recognition. The fingerprint sensor 102 in the embodiment of the present application may be a Complementary Metal-Oxide-Semiconductor (CMOS) sensor, and the electronic device 100 may include various handheld devices, vehicle-mounted devices, wearable devices, computing devices, or other processing devices connected to a wireless modem and having a wireless communication function, as well as various forms of User Equipment (UE), a Mobile Station (MS), a terminal device (terminal device), and the like.
The whole process of the fingerprint under the screen is as follows: the user triggers the fingerprint identification function of the electronic device by moving or contacting the electronic device 100, and starts the fingerprint identification module; the touch screen 101 emits light and displays a fingerprint identification area 103; the electronic device 100 is in an Idle state, and performs pressing detection scanning according to a first preset frequency; after the pressing operation of the user is confirmed, the electronic device 100 is switched to the Active state, and performs fingerprint scanning according to a third preset frequency to acquire a fingerprint image of the user in the fingerprint identification area 103. And finally, the fingerprint identification module carries out fingerprint identification according to the obtained fingerprint image.
In the process, the touch screen needs to actively emit light after the fingerprint identification module is triggered, so that the energy consumption is high. In addition, the electronic device 100 may further include a black screen gesture function, and the unlocking of the finger print under the screen adopts a mode shared by the black screen gesture, that is, the two functions are simultaneously turned on, which also causes a problem of large power consumption. Therefore, in order to balance the power consumption, the unlocking of the fingerprint under the screen is not optimal in the recognition speed, that is, the efficiency of the pressing detection scanning and the fingerprint scanning is low, so that the fingerprint recognition efficiency is low.
In order to optimize the above problem, please refer to fig. 1B, where fig. 1B is a schematic flowchart of a fingerprint scanning method provided in an embodiment of the present application, and the fingerprint scanning method is applied to an electronic device, where the electronic device includes a touch screen and a fingerprint sensor, as shown in fig. 1B, the fingerprint scanning method includes the following steps:
Specifically, the preset fingerprint identification area is an area displayed on the touch screen for receiving a user fingerprint pressing. In the process of unlocking the fingerprint under the screen, because the touch screen of the electronic equipment is a full-screen, a physical key (such as a Home key) which is obviously arranged is not used for receiving the fingerprint and pressing the fingerprint to scan the fingerprint, but the touch screen emits light after the fingerprint unlocking function is triggered, a preset fingerprint identification area is displayed on the touch screen, and the user is prompted to press the fingerprint in the area.
Specifically, when the preset fingerprint identification area is in an open state, the fingerprint sensor arranged below the preset fingerprint identification area starts to perform pressing scanning according to a certain pressing detection scanning frequency, and whether pressing operation exists on the preset fingerprint identification area is determined. And after the pressing operation is determined, the fingerprint sensor scans the fingerprint according to a certain fingerprint scanning frequency to obtain a fingerprint image.
In the process, in order to improve the efficiency of determining whether the preset fingerprint identification area has the pressing operation, the pressing detection scanning frequency is increased from a first preset frequency to a second preset frequency, namely the second preset frequency is greater than the first preset frequency; in order to improve the efficiency of obtaining the fingerprint image, the fingerprint scanning frequency is increased from the third preset frequency to the fourth preset frequency, namely the fourth preset frequency is greater than the third preset frequency. The first preset frequency and the third preset frequency can be the same, such as 30Hz, 40Hz and the like, or can be different; the second preset frequency and the fourth preset frequency may be the same, 100Hz,110Hz, etc., or may be different.
Optionally, after increasing the compression detection scanning frequency from the first preset frequency to the second preset frequency, the method further includes: detecting the pressing area of the finger of the target object pressing the preset fingerprint identification area according to the second preset frequency; and determining that the pressing area exceeds a second preset area, wherein the second preset area is smaller than a first preset area, and the first preset area is the pressing area which is required to be exceeded when a finger of the target object is pressed on the preset fingerprint identification area according to the first preset frequency.
In particular, the press detection scan frequency and the fingerprint scan frequency may be changed synchronously or asynchronously. That is, when it is determined that the preset fingerprint identification area is in an on 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 the preset fingerprint identification area has a pressing operation, the fingerprint scanning frequency is increased from the third frequency to the fourth frequency.
The specific process of determining that the preset fingerprint identification area has the pressing operation is as follows: the pressing area of the preset fingerprint area pressed by the finger of the target object is detected according to the second preset frequency, and the pressing image can be obtained more quickly because the second preset frequency is higher than the first preset frequency. And pressing areas are formed by all effective pressing positions in the pressing image, and when the pressing areas exceed a second preset area, the preset fingerprint area is determined to have pressing operation. The second preset area is smaller than the first preset area, and the first preset area is a pressing area which is required to be exceeded when a finger of the target object is detected to press the preset fingerprint identification area according to the first preset frequency scanning frequency. For example, the first predetermined area may be 70% of the predetermined identification area, and the second predetermined area may be 50% of the predetermined identification area. When the finger of the target object presses the screen, the area contacting the preset fingerprint identification area is larger along with the increase of the pressing force, and then when the pressing area in a certain frame image reaches the second preset area, the preset fingerprint pressing area is determined to have pressing operation, so that the determining efficiency of the pressing operation can be further improved.
Optionally, the detecting, according to the second preset frequency, a pressing area of the preset fingerprint identification area pressed by the finger of the target object includes: detecting a pressing image of a target object on the touch screen according to a second preset frequency; determining the number of whole pixels included in the pressed image, wherein the number of the whole pixels represents the number of pixels of a pixel area which are all included in the range of the pressed image; and acquiring the area corresponding to the number of the whole pixels, and determining the area as the pressing area of the preset fingerprint identification area.
When the pressing area of the preset fingerprint identification area is pressed by the finger of the detection target object is detected 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, and the higher the detection frequency is, the higher the speed of obtaining the pressing image is. After one or more compression images are obtained, a compression area on the compression image is determined. Since the finger is curved, the area of the finger pressed during pressing may not be a regular pattern, and if there is dirt on the finger, the scanned fingerprint image may be incomplete, and therefore, the number of whole pixels covered by the pressed image needs to be determined, and if the pressed image covers only 70% of the area of one pixel a, the pixel a is not counted as the area of the finger, and 100% of the area of the pixel B is covered by the pressed image, and the pixel B is counted as the area of the finger. Therefore, the pressing area is obtained by the following formula: s0＝s1N, wherein S0Denotes the total area of the press, s1Representing the area of each pixel and n representing the total number of pixels occupied by the pressed image.
Therefore, in the embodiment of the application, the pressing image is obtained through the second preset frequency, the second preset frequency is greater than the first preset frequency, the obtaining efficiency of the pressing image can be improved, the number of the whole pixels included in the pressing image is determined, the pressing area is determined, the accuracy of determining the pressing area can be improved, and the misjudgment rate of determining the pressing operation is reduced. After the pressing area is obtained, whether the pressing area exceeds a second preset area or not is further determined, wherein the second preset area is smaller than a first preset area which is required to be exceeded by pressing the finger of the target object with a first preset frequency, the preset area which is required to be exceeded by the preset fingerprint identification area is reduced, the pressing operation is required to be determined, and the determining efficiency of the pressing operation can be further improved. The method improves the efficiency of press operation identification in the identification of the finger print under the screen on the whole.
Optionally, the electronic device includes a black screen gesture function, and before detecting whether a preset fingerprint identification area in the electronic device is in an open state, the method further includes: determining that a black screen gesture function of the electronic device is in an enabled state.
The black screen gesture refers to a process of directly entering an application program through preset gesture operation when the electronic device is in a black screen standby state. The black screen gesture function can bring much convenience to the user, and the function and the under-screen fingerprint unlocking function can be in a common mode. Namely, the functions of unlocking the finger print under the screen and opening the gesture function of black screen are simultaneously started. The relationship between the two is shown in Table 1:
TABLE 1 comparison table of function switch conditions
| Switch with a switch body | Trigger (open) | Trigger (off) | |
| Finger-print unlocking under screen | Is provided with | The sensor receives the signal | No signal for a long time |
| Black screen gesture | Is provided with | Corresponding gesture | Close to the body |
Only when the finger print unlocking and the black screen gesture set the opening state under the screen, the two functions can be triggered to be opened or closed according to various trigger conditions. The two functions can adopt a common mode, namely the two functions are simultaneously started, but the trigger conditions of the two functions are different and are not influenced mutually. It is also possible to use a non-shared mode, i.e. to activate one of the functions separately.
When the finger print unlocking and the black screen gesture are in a common mode, the two functions are started at the same time, energy is consumed, and in order to balance the power consumption, the scanning frequency of the finger print unlocking under the screen is set to be lower, for example, the scanning frequency is the first preset frequency. But this reduces the efficiency of fingerprint unlocking. If the finger print unlocking and the black screen gesture under the screen are in a non-shared mode, and the function of the black screen gesture is in a closed state, the scanning frequency of the finger print unlocking under the screen which is opened under the condition is not influenced by the black screen gesture, for example, the scanning frequency can be directly set to be a second preset frequency which is a normal frequency and does not need to be adjusted. Under this kind of prerequisite, improve when detecting that it is in the open mode to predetermine the fingerprint identification region and press detection scanning frequency and fingerprint scanning frequency, can carry out a predetermined judgement: determining that a black screen gesture function of the electronic device is in an enabled state. If the black screen gesture function of the electronic device is in the enabled state and the preset fingerprint identification area is detected to be in the open state, the scanning frequency of the original fingerprint sensor is low at this time, and the scanning frequency needs to be improved.
Therefore, in the embodiment of the application, whether the black screen gesture function of the electronic device is started or not is judged in advance, and whether the sensor scanning frequency (including the pressing detection scanning frequency and the fingerprint scanning frequency) of the electronic device needs to be improved or not is further determined, the pertinence and the effectiveness of frequency adjustment can be further improved, and the energy consumption for detecting the preset fingerprint identification area under the condition that the adjustment is not needed is reduced.
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 a fourth preset frequency; performing 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 values from the at least one evaluation value to obtain K target evaluation values; acquiring K target fingerprint images corresponding to the K target evaluation values as target fingerprint images to obtain K target fingerprint images; performing feature extraction on the K target fingerprint images to obtain at least one feature point set, wherein each target fingerprint image corresponds to one feature point set; matching each feature point set in the at least one feature point set with a feature point set of a preset fingerprint template to obtain at least one matching value; confirming that the fingerprint image is successfully verified when a maximum value of the at least one matching value is greater than a preset threshold value.
Specifically, after the fingerprint scanning frequency is increased, a plurality of fingerprint images of the target object are obtained, and because the fingerprint images may have the problem of being unclear due to uneven stress, finger sweat, dirt, injury and the like, the fingerprint images need to be subjected to quality screening. In the embodiment of the application, screening is completed through image quality evaluation. The preset evaluation value may be a default of the system or a self-set by the user, and the preset threshold may be a default of the system or a self-set by the user, which is not limited herein; the electronic device may perform image quality evaluation on at least one fingerprint image, and in a specific implementation, the image quality evaluation index may be used to perform image quality evaluation on each fingerprint image in the at least one fingerprint image to obtain at least one image quality evaluation value, where the image quality evaluation index may include at least one of the following: the average gray, mean square error, entropy, edge preservation, signal-to-noise ratio, etc. may be defined as the larger the image quality evaluation value, the better the image quality.
Further, the preset fingerprint template may be set by the user or default by the system, and may be a finger fingerprint image of different areas of different fingers of the user collected by the electronic device, and K evaluation values with the largest evaluation value may be selected from the at least one evaluation value, so as to obtain K target evaluation values. The determination of the K value may be a fixed percentage of the total evaluation values, for example, at least one evaluation value is M evaluation values, the fixed percentage is P, and then K is M × P; or the K value is determined by the number of the at least one evaluation value which is larger than a preset evaluation threshold value. Acquiring fingerprint images corresponding to the K target evaluation values as target fingerprint images, so as to obtain at least one high-quality target fingerprint image, and performing feature extraction on the at least one target fingerprint image, where the features may include information of ridges and valleys on the surface of a finger, and the like, and this is not limited herein, so as to obtain at least one feature point set, where each target fingerprint image corresponds to one feature point set, matching each feature point set in the at least one feature point set with a feature point set of a preset fingerprint template to obtain at least one matching value, and finally, when a maximum value in the at least one matching value is greater than a preset threshold value, it may be determined that the fingerprint images are successfully verified, and thus, the verification of the fingerprint images is completed.
The feature extraction method may include at least one of the following: speeded Up Robust Feature (SURF), Scale Invariant Feature Transform (SIFT), Speeded Up From Accessed Segment Test (FAST), Harris corner method, etc., without limitation.
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 on 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. Because predetermine the fingerprint identification area and be used for receiving the region that the user's fingerprint pressed on the touch screen for showing, improve the frequency when detecting that the fingerprint identification area is in the open mode then, can reduce the consumption when the fingerprint identification area is in the closed mode. The efficiency of detecting the user and pressing the operation and the efficiency of fingerprint scanning can effectively be promoted to the promotion and press detection scanning frequency and fingerprint scanning frequency, and then fingerprint unblock efficiency under the effective promotion screen.
Referring to fig. 2, fig. 2 is a schematic flowchart illustrating another fingerprint scanning method according to an embodiment of the present disclosure, and as shown in fig. 2, the fingerprint scanning method includes the following steps:
and step 207, increasing the fingerprint scanning frequency from the third preset frequency to a fourth preset frequency.
The detailed description of steps 201 to 207 may refer to the corresponding description of the fingerprint scanning method described in steps 111 to 112, and is not repeated herein.
In the embodiment of the application, the pressing image is obtained through the second preset frequency, the second preset frequency is greater than the first preset frequency, the obtaining efficiency of the pressing image can be improved, the number of the whole pixels included in the pressing image is determined, the pressing area is determined, the accuracy of determining the pressing area can be improved, and the misjudgment rate of determining the pressing operation is reduced. After the pressing area is obtained, whether the pressing area exceeds a second preset area or not is further determined, wherein the second preset area is smaller than a first preset area which is required to be exceeded by pressing the finger of the target object with a first preset frequency, the preset area which is required to be exceeded by the preset fingerprint identification area is reduced, the pressing operation is required to be determined, and the determining efficiency of the pressing operation can be further improved. The method improves the efficiency of press operation identification in the identification of the finger print under the screen on the whole.
Referring to fig. 3, fig. 3 is a schematic flowchart of another fingerprint scanning method according to an embodiment of the present application, and as shown in fig. 3, the fingerprint scanning method includes the following steps:
The detailed description of steps 301 to 303 may refer to the corresponding description of the fingerprint scanning method described in steps 111 to 112, and is not repeated herein.
In the embodiment of the application, whether the black screen gesture function is started by the electronic device is judged in advance, and whether the sensor scanning frequency (including the pressing detection scanning frequency and the fingerprint scanning frequency) of the electronic device needs to be improved is further determined, the pertinence and the effectiveness of frequency adjustment can be further improved, and the energy consumption for detecting the preset fingerprint identification area under the condition that the adjustment is not needed is reduced.
Referring to fig. 4, fig. 4 is a schematic flowchart illustrating another fingerprint scanning method according to an embodiment of the present application, and as shown in fig. 4, the fingerprint scanning method includes the following steps:
step 403, acquiring at least one fingerprint image of the target object according to a fourth preset frequency;
The detailed description of steps 401 to 409 may refer to the corresponding description of the fingerprint scanning method described in steps 111 to 112, and will not be repeated herein.
In the embodiment of the application, the resolution of the display content is improved by adopting a double-triple interpolation method, and the display images with gradually increased resolutions are sequentially displayed in a plurality of display layers from top to bottom, so that the definition of the content information being displayed can be effectively increased.
In accordance with the above, please refer to fig. 5, fig. 5 is a schematic structural diagram of an electronic device according to an embodiment of the present disclosure, and as shown in fig. 5, the electronic device includes a processor 501, a memory 502, a communication interface 503, a plurality of display layers 504, and one or more programs 505, where the one or more programs are stored in the memory 502 and configured to be executed by the processor, and the programs include instructions for performing 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.
It can be seen that, in the embodiment of the present application, when detecting that the preset fingerprint identification area in the electronic device is in an on state, the electronic device increases the pressing detection scanning frequency from the first preset frequency to the second preset frequency, and increases the fingerprint scanning frequency from the third preset frequency to the fourth preset frequency. Because predetermine the fingerprint identification area and be used for receiving the region that the user's fingerprint pressed on the touch screen for showing, improve the frequency when detecting that the fingerprint identification area is in the open mode then, can reduce the consumption when the fingerprint identification area is in the closed mode. The efficiency of detecting the user and pressing the operation and the efficiency of fingerprint scanning can effectively be promoted to the promotion and press detection scanning frequency and fingerprint scanning frequency, and then fingerprint unblock efficiency under the effective promotion screen.
In one possible example, after increasing the compression detection scan frequency from the first preset frequency to the second preset frequency, the program further comprises instructions for performing the steps of:
detecting the pressing area of the finger of the target object pressing the preset fingerprint identification area according to the second preset frequency;
and determining that the pressing area exceeds a second preset area, wherein the second preset area is smaller than a first preset area, and the first preset area is the pressing area which is required to be exceeded when a finger of the target object is pressed on the preset fingerprint identification area according to the first preset frequency.
In one possible example, the electronic device includes a black screen gesture function, and before detecting whether a preset fingerprint identification area in the electronic device is in an open state, the program further includes instructions for performing the following steps:
determining that a black screen gesture function of the electronic device is in an enabled state.
In one possible example, in terms of the pressing area of the finger of the detection target object pressing the preset fingerprint identification area according to the second preset frequency, the instructions in the program are specifically configured to perform the following operations:
detecting a pressing image of a target object on the touch screen according to a second preset frequency;
determining the number of whole pixels included in the pressed image, wherein the number of the whole pixels represents the number of pixels of a pixel area which are all included in the range of the pressed image;
and acquiring the area corresponding to the number of the whole pixels, and determining the area as the pressing area of the preset fingerprint identification area.
In one possible example, after increasing the fingerprint scanning frequency from the third preset frequency to the fourth preset frequency, the program further comprises instructions for performing the steps of:
acquiring at least one fingerprint image of the target object according to a fourth preset frequency;
performing 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 values from the at least one evaluation value to obtain K target evaluation values;
acquiring K target fingerprint images corresponding to the K target evaluation values as target fingerprint images to obtain K target fingerprint images;
performing feature extraction on the K target fingerprint images to obtain at least one feature point set, wherein each target fingerprint image corresponds to one feature point set;
matching each feature point set in the at least one feature point set with a feature point set of a preset fingerprint template to obtain at least one matching value;
confirming that the fingerprint image is successfully verified when a maximum value of the at least one matching value is greater than a preset threshold value.
The above description has introduced the solution of the embodiment of the present application mainly from the perspective of the method-side implementation process. It is understood that the electronic device comprises corresponding hardware structures and/or software modules for performing the respective functions in order to realize the above functions. Those of skill in the art will readily appreciate that the present application is capable of hardware or a combination of hardware and computer software implementing the various illustrative elements and algorithm steps described in connection with the embodiments provided herein. Whether a function is performed as hardware or computer software drives hardware depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
In the embodiment of the present application, the electronic device may be divided into the functional units according to the method example, for example, each functional unit may be divided corresponding to each function, or two or more functions may be integrated into one processing unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit. It should be noted that the division of the unit in the embodiment of the present application is schematic, and is only a logic function division, and there may be another division manner in actual implementation.
Fig. 6 is a block diagram of functional units of a fingerprint scanning apparatus 600 according to an embodiment of the present application. The fingerprint scanning device 600 is applied to an electronic device, and the fingerprint scanning device 600 includes:
the detection unit 601 is configured to detect whether a preset fingerprint identification area in the electronic device is in an on state, where the preset fingerprint identification area is an area displayed on the touch screen and used for receiving a user fingerprint pressing;
an adjusting unit 602, configured to increase a pressing detection scanning frequency of the fingerprint sensor from a first preset frequency to a second preset frequency and increase a fingerprint scanning frequency of the fingerprint sensor from a third preset frequency to a fourth preset frequency if it is determined that the preset fingerprint identification area is in an on state.
It can be seen that, in the embodiment of the present application, the fingerprint scanning device is applied to the electronic device, and the electronic device includes a touch screen and a fingerprint sensor. When detecting that a preset fingerprint identification area in the electronic equipment is in an open state, the fingerprint scanning device increases the pressing detection scanning frequency from a first preset frequency to a second preset frequency, and increases the fingerprint scanning frequency from a third preset frequency to a fourth preset frequency. Because predetermine the fingerprint identification area and be used for receiving the region that the user's fingerprint pressed on the touch screen for showing, improve the frequency when detecting that the fingerprint identification area is in the open mode then, can reduce the consumption when the fingerprint identification area is in the closed mode. The efficiency of detecting the user and pressing the operation and the efficiency of fingerprint scanning can effectively be promoted to the promotion and press detection scanning frequency and fingerprint scanning frequency, and then fingerprint unblock efficiency under the effective promotion screen.
In one possible example, the fingerprint scanning device further comprises a determining unit 603, after increasing the press detection scan frequency from the first preset frequency to the second preset frequency, the determining unit 603 being configured to:
detecting the pressing area of the finger of the target object pressing the preset fingerprint identification area according to the second preset frequency;
and determining that the pressing area exceeds a second preset area, wherein the second preset area is smaller than a first preset area, and the first preset area is the pressing area which is required to be exceeded when a finger of the target object is pressed on the preset fingerprint identification area according to the first preset frequency.
In one possible example, the electronic device includes a black screen gesture function, and before detecting whether a preset fingerprint identification area in the electronic device is in an open state, the detecting unit is further configured to:
determining that a black screen gesture function of the electronic device is in an enabled state.
In one possible example, in terms of detecting a pressing area of the preset fingerprint identification area pressed by the finger of the target object according to the second preset frequency, the determining unit 603 is specifically configured to:
detecting a pressing image of a target object on the touch screen according to a second preset frequency;
determining the number of whole pixels included in the pressed image, wherein the number of the whole pixels represents the number of pixels of a pixel area which are all included in the range of the pressed image;
and acquiring the area corresponding to the number of the whole pixels, and determining the area as the pressing area of the preset fingerprint identification area.
In one 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;
performing 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 values from the at least one evaluation value to obtain K target evaluation values;
acquiring K target fingerprint images corresponding to the K target evaluation values as target fingerprint images to obtain K target fingerprint images;
performing feature extraction on the K target fingerprint images to obtain at least one feature point set, wherein each target fingerprint image corresponds to one feature point set;
matching each feature point set in the at least one feature point set with a feature point set of a preset fingerprint template to obtain at least one matching value;
confirming that the fingerprint image is successfully verified when a maximum value of the at least one matching value is greater than a preset threshold value.
Embodiments of the present application also provide a computer storage medium, where the computer storage medium stores a computer program for electronic data exchange, and the computer program enables a computer to execute part or all of the steps of any one of the methods described in the above method embodiments, and the computer includes a mobile terminal.
Embodiments of the present application also provide a computer program product comprising a non-transitory computer readable storage medium storing a computer program operable to cause a computer to perform some or all of the steps of any of the methods as described in the above method embodiments. The computer program product may be a software installation package, the computer comprising a mobile terminal.
It should be noted that, for simplicity of description, the above-mentioned method embodiments are described as a series of acts or combination of acts, but those skilled in the art will recognize that the present application is not limited by the order of acts described, as some steps may occur in other orders or concurrently depending on the application. Further, those skilled in the art should also appreciate that the embodiments described in the specification are preferred embodiments and that the acts and modules referred to are not necessarily required in this application.
In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus may be implemented in other manners. For example, the above-described embodiments of the apparatus are merely illustrative, and for example, the above-described division of the units is only one type of division of logical functions, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection of some interfaces, devices or units, and may be an electric or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated unit, if implemented as a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable memory. Based on such understanding, the technical solution of the present application may be substantially implemented or a part of or all or part of the technical solution contributing to the prior art may be embodied in the form of a software product stored in a memory, and including several instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the above-mentioned method of the embodiments of the present application. And the aforementioned memory comprises: various media capable of storing program codes, such as a usb disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic disk, or an optical disk.
Those skilled in the art will appreciate that all or part of the steps in the methods of the above embodiments may be implemented by associated hardware instructed by a program, which may be stored in a computer-readable memory, which may include: flash disk, ROM, RAM, magnetic or optical disk, and the like.
The foregoing detailed description of the embodiments of the present application has been presented to illustrate the principles and implementations of the present application, and the above description of the embodiments is only provided to help understand the method and the core concept of the present application; meanwhile, for a person skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.
Claims (7)
1. A 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 for unlocking an off-screen fingerprint in the electronic equipment is in an open state, wherein the preset fingerprint identification area is an area displayed on a touch screen and used for receiving user fingerprint pressing;
if the preset fingerprint identification area is determined to be in an open state, the pressing detection scanning frequency of the fingerprint sensor is increased from a first preset frequency to a second preset frequency, and the fingerprint scanning frequency of the fingerprint sensor is increased from a third preset frequency to a fourth preset frequency; the first preset frequency is a pressing detection scanning frequency when the finger print unlocking and the black screen gesture are in a common mode;
acquiring at least one fingerprint image of the target object according to the fourth preset frequency; performing 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 values from the at least one evaluation value to obtain K target evaluation values; acquiring K fingerprint images corresponding to the K target evaluation values as target fingerprint images to obtain K target fingerprint images; performing feature extraction on the K target fingerprint images to obtain at least one feature point set, wherein each target fingerprint image corresponds to one feature point set; matching each feature point set in the at least one feature point set with a feature point set of a preset fingerprint template to obtain at least one matching value; confirming that the fingerprint image is successfully verified when the maximum value of the at least one matching value is greater than a preset threshold value;
wherein after increasing the press detection scan frequency from the first preset frequency to the second preset frequency, the method further comprises: detecting the pressing area of the finger of the target object pressing the preset fingerprint identification area according to the second preset frequency; determining that the pressing area exceeds a second preset area, wherein the second preset area is smaller than a first preset area, and the first preset area is the pressing area which is required to be exceeded when the finger of the target object is detected to press the preset fingerprint identification area according to the first preset frequency.
2. The method of claim 1, wherein the electronic device comprises a black screen gesture function, and before detecting whether a preset fingerprint identification area in the electronic device is in an on state, the method further comprises:
determining that a black screen gesture function of the electronic device is in an enabled state.
3. The method according to claim 2, wherein the detecting a pressing area of the finger of the target object pressing the preset fingerprint identification area according to the second preset frequency comprises:
detecting a pressing image of a target object on the touch screen according to a second preset frequency;
determining the number of whole pixels included in the pressed image, wherein the number of the whole pixels represents the number of pixels of a pixel area which are all included in the range of the pressed image;
and acquiring the area corresponding to the number of the whole pixels, and determining the area as the pressing area of the preset fingerprint identification area.
4. A fingerprint scanning device, comprising:
the device comprises a detection unit, a processing unit and a control unit, wherein the detection unit is used for detecting whether a preset fingerprint identification area for unlocking a fingerprint under a screen in the electronic equipment is in an open state or not, and the preset fingerprint identification area is an area which is displayed on a touch screen and used for receiving the pressing of a user fingerprint;
the adjustment unit is used for increasing the pressing detection scanning frequency of the fingerprint sensor from a first preset frequency to a second preset frequency and increasing the fingerprint scanning frequency of the fingerprint sensor from a third preset frequency to a fourth preset frequency if the preset fingerprint identification area is determined to be in an open state; the first preset frequency is a pressing detection scanning frequency when the finger print unlocking and the black screen gesture are in a common mode;
the device comprises a determining unit, a processing unit and a processing unit, wherein the determining unit is used for detecting the pressing area of a finger of a target object pressing the preset fingerprint identification area according to a second preset frequency after the pressing detection scanning frequency is increased from a first preset frequency to the second preset frequency; determining that the pressing area exceeds a second preset area, wherein the second preset area is smaller than a first preset area, and the first preset area is a pressing area which is required to be exceeded for detecting that the finger of the target object presses the preset fingerprint identification area according to the first preset frequency;
the adjusting unit is further configured to obtain at least one fingerprint image of the target object according to a fourth preset frequency after the fingerprint scanning frequency is increased from a third preset frequency to the fourth preset frequency; performing 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 values from the at least one evaluation value to obtain K target evaluation values; acquiring K fingerprint images corresponding to the K target evaluation values as target fingerprint images to obtain K target fingerprint images; performing feature extraction on the K target fingerprint images to obtain at least one feature point set, wherein each target fingerprint image corresponds to one feature point set; matching each feature point set in the at least one feature point set with a feature point set of a preset fingerprint template to obtain at least one matching value; confirming that the fingerprint image is successfully verified when a maximum value of the at least one matching value is greater than a preset threshold value.
5. The apparatus according to claim 4, wherein the electronic device comprises a black screen gesture function, and before detecting whether a preset fingerprint identification area in the electronic device is in an on state, the detecting unit is further configured to:
determining that a black screen gesture function of the electronic device is in an enabled state.
6. An electronic device comprising a processor, a memory, a communication interface, and one or more programs stored in the memory and configured to be executed by the processor, the programs comprising instructions for performing the steps in the method of any of claims 1-3.
7. A computer-readable storage medium, characterized in that a computer program for electronic data exchange is stored, wherein the computer program causes a computer to perform the method according to any one of claims 1-3.
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| CN110928068B (en) * | 2019-11-28 | 2022-03-11 | 厦门天马微电子有限公司 | Display panel, driving method thereof and display device |
| CN111161452A (en) * | 2019-12-30 | 2020-05-15 | 珠海格力电器股份有限公司 | Scanning method and scanning device for controlling electronic lock authentication module |
| CN111443823B (en) * | 2020-03-23 | 2022-06-28 | Oppo（重庆）智能科技有限公司 | Terminal control method, device, terminal and storage medium |
| CN111857413B (en) * | 2020-07-02 | 2024-03-01 | Oppo广东移动通信有限公司 | Touch screen control method and device, terminal equipment and storage medium |
| CN113205761A (en) | 2021-04-30 | 2021-08-03 | 上海天马微电子有限公司 | Display panel driving method and display device |
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