CN110187806B - Fingerprint template input method and related device - Google Patents
Fingerprint template input method and related device Download PDFInfo
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- CN110187806B CN110187806B CN201910431154.9A CN201910431154A CN110187806B CN 110187806 B CN110187806 B CN 110187806B CN 201910431154 A CN201910431154 A CN 201910431154A CN 110187806 B CN110187806 B CN 110187806B
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
- G06F21/30—Authentication, i.e. establishing the identity or authorisation of security principals
- G06F21/45—Structures or tools for the administration of authentication
- G06F21/46—Structures or tools for the administration of authentication by designing passwords or checking the strength of passwords
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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
- G06F3/048—Interaction techniques based on graphical user interfaces [GUI]
- G06F3/0481—Interaction techniques based on graphical user interfaces [GUI] based on specific properties of the displayed interaction object or a metaphor-based environment, e.g. interaction with desktop elements like windows or icons, or assisted by a cursor's changing behaviour or appearance
- G06F3/04817—Interaction techniques based on graphical user interfaces [GUI] based on specific properties of the displayed interaction object or a metaphor-based environment, e.g. interaction with desktop elements like windows or icons, or assisted by a cursor's changing behaviour or appearance using icons
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/048—Interaction techniques based on graphical user interfaces [GUI]
- G06F3/0484—Interaction techniques based on graphical user interfaces [GUI] for the control of specific functions or operations, e.g. selecting or manipulating an object, an image or a displayed text element, setting a parameter value or selecting a range
- G06F3/04847—Interaction techniques to control parameter settings, e.g. interaction with sliders or dials
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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
- G06F3/048—Interaction techniques based on graphical user interfaces [GUI]
- G06F3/0487—Interaction techniques based on graphical user interfaces [GUI] using specific features provided by the input device, e.g. functions controlled by the rotation of a mouse with dual sensing arrangements, or of the nature of the input device, e.g. tap gestures based on pressure sensed by a digitiser
- G06F3/0488—Interaction techniques based on graphical user interfaces [GUI] using specific features provided by the input device, e.g. functions controlled by the rotation of a mouse with dual sensing arrangements, or of the nature of the input device, e.g. tap gestures based on pressure sensed by a digitiser using a touch-screen or digitiser, e.g. input of commands through traced gestures
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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
- G06V40/1306—Sensors therefor non-optical, e.g. ultrasonic or capacitive sensing
Abstract
The embodiment of the application discloses a fingerprint template input method and a related device, wherein electronic equipment firstly displays a first guide icon in a preset area and detects a pressing operation aiming at the preset area, and the first guide icon is used for guiding a user to perform the pressing operation in the preset area; secondly, when the pressing operation aiming at the preset area is detected, acquiring a first fingerprint image and detecting whether the pressing operation is finished; then, after the pressing operation is finished, filtering non-real fingerprint information according to the first fingerprint image and the first guide icon to obtain a second fingerprint image; thirdly, if the second fingerprint image is not the fingerprint image recorded for the first time in the fingerprint recording process, synthesizing the second fingerprint image and the fingerprint image recorded before in the fingerprint recording process to obtain a quasi-fingerprint template; and finally, determining whether the quasi fingerprint template is complete, and if so, taking the quasi fingerprint template as a fingerprint template and storing the fingerprint template. The method and the device can improve the accuracy of the input fingerprint template.
Description
Technical Field
The application relates to the technical field of electronic equipment, in particular to a fingerprint template input method and a related device.
Background
In the current scheme of fingerprint under a screen of an electronic device such as a mobile phone, the input process of a fingerprint template is basically consistent with the unlocking process of a traditional capacitive fingerprint, namely, a User is guided to press a preset area through a User Interface (UI) icon displayed in the screen to acquire a fingerprint image.
If non-fingerprint information is input in the fingerprint input process, the non-fingerprint information can be collected into a fingerprint collection picture as fingerprint information and contained in a final fingerprint template. In the fingerprint unlocking process, if a template containing Non-fingerprint factors is used for fingerprint comparison, the False Non-Match Rate (FRR) of the fingerprint unlocking process is obviously increased.
Disclosure of Invention
The embodiment of the application provides a fingerprint template input method and a related device, aiming at improving the accuracy of a fingerprint template input by electronic equipment and reducing the fingerprint false rejection rate.
In a first aspect, an embodiment of the present application provides a fingerprint template entering method, which is applied to an electronic device, a display screen of the electronic device includes a preset area for performing fingerprint identification, the electronic device is opposite to the preset area, and a fingerprint module is disposed in the preset area, the method includes:
in the fingerprint input process, displaying a first guide icon in the preset area, and detecting the pressing operation aiming at the preset area, wherein the first guide icon is used for guiding a user to perform the pressing operation in the preset area;
when the pressing operation aiming at the preset area is detected, acquiring a first fingerprint image, and detecting whether the pressing operation is finished;
after the pressing operation is finished, filtering non-real fingerprint information according to the first fingerprint image and the first guide icon to obtain a second fingerprint image;
if the second fingerprint image is not the fingerprint image recorded for the first time in the fingerprint recording process, synthesizing the second fingerprint image with the fingerprint image recorded before in the fingerprint recording process to obtain a quasi-fingerprint template;
and determining whether the quasi fingerprint template is complete, and if so, taking the quasi fingerprint template as a fingerprint template and storing the fingerprint template.
In a second aspect, an embodiment of the present application provides a fingerprint template entry device, which is applied to an electronic device, a display screen of the electronic device includes a preset area for performing fingerprint identification, and the electronic device is provided with a fingerprint module corresponding to the preset area; the fingerprint template entry device comprises a processing unit, wherein:
the processing unit is used for collecting a first fingerprint image when the pressing operation aiming at the preset area is detected, and detecting whether the pressing operation is finished or not; the fingerprint sensor is used for carrying out non-real fingerprint information filtering according to the first fingerprint image and the first guide icon after the pressing operation is finished, so that a second fingerprint image is obtained; and the fingerprint registration module is used for synthesizing the second fingerprint image and a fingerprint image which is previously registered in the fingerprint registration process under the condition that the second fingerprint image is not the fingerprint image which is registered for the first time in the fingerprint registration process to obtain a quasi-fingerprint template; and the fingerprint template storage module is used for determining whether the quasi fingerprint template is complete or not and taking the quasi fingerprint template as a fingerprint template and storing the fingerprint template under the condition that the quasi fingerprint template is complete.
In a third aspect, an embodiment of the present application provides an electronic device, including a processor, a memory, a communication interface, and one or more programs, where the one or more programs are stored in the memory and configured to be executed by the processor, and the program includes instructions for executing steps in any method of the first aspect of the embodiment of the present application.
In a fourth aspect, the present application provides a computer-readable storage medium, where the computer-readable storage medium stores a computer program for electronic data exchange, where the computer program makes a computer perform part or all of the steps described in any one of the methods of the first aspect of the present application.
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, in the embodiment of the application, the electronic device first displays a first guide icon in the preset area, and detects a pressing operation for the preset area, where the first guide icon is used for guiding a user to perform the pressing operation in the preset area; secondly, when the pressing operation aiming at the preset area is detected, acquiring a first fingerprint image and detecting whether the pressing operation is finished; then, after the pressing operation is finished, filtering non-real fingerprint information according to the first fingerprint image and the first guide icon to obtain a second fingerprint image; thirdly, if the second fingerprint image is not the fingerprint image recorded for the first time in the fingerprint recording process, synthesizing the second fingerprint image and the fingerprint image recorded before in the fingerprint recording process to obtain a quasi-fingerprint template; and finally, determining whether the quasi fingerprint template is complete, and if so, taking the quasi fingerprint template as a fingerprint template and storing the fingerprint template. As can be seen, in this example, the electronic device performs filtering on the unreal fingerprint information according to the first fingerprint image and the first guide icon to obtain a second fingerprint image, so that the fingerprint template does not contain the unreal fingerprint information, thereby avoiding the problem that the unreal fingerprint information is entered in the fingerprint entry process due to too late hiding time of the first guide icon caused by factors such as system jamming and the like, and improving the accuracy of the entered fingerprint template; the false rejection rate of the fingerprint authentication process can be reduced in the fingerprint authentication process.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic diagram of an electronic device for collecting a fingerprint according to an embodiment of the present application;
fig. 2a is a schematic flowchart of a fingerprint template entry method provided in an embodiment of the present application;
FIG. 2b is a schematic diagram of a mode provided by an embodiment of the present application;
FIG. 2c is a schematic diagram of a mode provided by an embodiment of the present application;
FIG. 2d is a schematic diagram of a mode provided by an embodiment of the present application;
fig. 2e is a schematic process diagram of an image capturing effect provided by an embodiment of the present application;
FIG. 3 is a schematic flowchart of another fingerprint template entry method provided in an embodiment of the present application;
fig. 4 is a schematic structural diagram of an electronic device according to an embodiment of the present application;
fig. 5 is a block diagram of functional units of a fingerprint template entry apparatus according to an embodiment of the present application.
Detailed Description
The fingerprint identification technology corresponds a person with his fingerprint, and the real identity of the person can be verified by comparing his fingerprint with a pre-stored fingerprint template and identifying through minutiae points of different fingerprints. The characteristic points refer to break points, bifurcation points and turning points of interruption, bifurcation or turning of fingerprint lines. The fingerprint lines of each person are different from each other on patterns, breakpoints, bifurcation points and turning points and are unique. And the uniqueness of the fingerprint identification technology is not changed for a whole life, and the fingerprint identification technology can be created only by means of the uniqueness and the stability. The fingerprint identification technology has the advantages of high identification speed, convenience in acquisition, low price and the like, and is widely applied to a plurality of subject fields such as image processing, mode identification, computer vision and the like.
As shown in fig. 1, fig. 1 is a schematic view of an electronic device 101 collecting fingerprints, and this electronic device 101 includes display screen 102 and for the fingerprint module 104 that the predetermined area 103 of display screen 102 set up, 105 are the fingerprint enlargements, and when user's finger touched the screen, the light that display screen 102 sent penetrated the apron and lighted the fingerprint texture, formed the fingerprint light film, and the fingerprint was given the fingerprint module with reflection light passback, finally formed fingerprint image. The electronic device according to the embodiment of the present application may be an electronic device with a fingerprint module, and the electronic device may include various handheld devices, vehicle-mounted devices, wearable devices, computing devices or other processing devices connected to a wireless modem, and various User Equipment (UE), mobile Stations (MS), terminal devices (terminal device), and the like.
At present, because fingerprint scheme under the screen is pressed the back through the fingerprint and is triggered the fingerprint module of laying in the screen below and carry out optical image and gather, consequently if the UI icon on the screen (the UI icon is used for the sign fingerprint to press the position) the in-process that the fingerprint pressed that disappears is slower (receive factors such as system card pause), have great probability to be collected the fingerprint and adopt the picture as fingerprint information, contain in final fingerprint template. In the fingerprint unlocking process, if the template containing the Non-fingerprint factors is used for fingerprint comparison, the False Non-Match Rate (FRR) of the fingerprint unlocking process is obviously increased. Based on this, the embodiment of the present application provides a fingerprint template entering method to solve the above problem, and the following describes the embodiment of the present application in detail.
Referring to fig. 2a, fig. 2a is a schematic flowchart of a fingerprint template entry method provided in an embodiment of the present application, and is applied to an electronic device, a display screen of the electronic device includes a preset area for performing fingerprint identification, and the electronic device is provided with a fingerprint module corresponding to the preset area, as shown in the figure, the fingerprint template entry method includes:
the electronic equipment displays a first guide icon in a preset area in a fingerprint inputting process, and detects a pressing operation aiming at the preset area, wherein the first guide icon is used for guiding a user to perform the pressing operation in the preset area.
Wherein, the fingerprint module can be integrated in electronic equipment's screen, also can be optical fingerprint module under the screen, does not do the only restriction here.
The projection of the preset area on the plane where the sampling end of the fingerprint module is located is coincided with the sampling end, the fingerprint identification area can be in a circular shape, a square shape, an irregular shape and the like, and the unique limitation is not made here.
The pressing operation can trigger the electronic equipment to highlight the preset area to prompt the user to press the position with the finger, and the display effect can be dynamically changed or fixed and is not limited uniquely here.
Wherein the acquiring process of the first guide icon comprises the steps of firstly reading a flag bit value; and looking up a table according to the flag bit value to obtain an icon mode, and looking up a map library according to the icon mode to obtain a first guide icon.
For example, the electronic device may support display of guide icons in multiple modes in a preset area, and the first guide icon may specifically include an icon in a "mirror flower moon" mode as shown in fig. 2b, or an icon in a "virtual air force field" mode as shown in fig. 2c, or an icon in an "energy beam" mode as shown in fig. 2 d.
202, when the electronic device detects a pressing operation on a preset area, acquiring a first fingerprint image, and detecting whether the pressing operation is finished.
When the electronic equipment detects the pressing operation aiming at the preset area, the electronic equipment can hide the first guide icon displayed in the preset area, and the interference of the first guide icon on the collected fingerprint image is avoided.
And 203, after the pressing operation is finished, the electronic equipment filters the non-real fingerprint information according to the first fingerprint image and the first guide icon to obtain a second fingerprint image.
And the filtering of the unreal fingerprint information comprises the steps of calculating the similarity of the color information of the corresponding pixel point when the lifting of the pressing operation is detected, and determining to filter the unreal fingerprint information based on the similarity.
And 204, if the second fingerprint image is not the fingerprint image which is firstly recorded in the fingerprint recording process, the electronic equipment synthesizes the second fingerprint image with the fingerprint image which is recorded before in the fingerprint recording process to obtain the quasi-fingerprint template.
If the second fingerprint image is not the first fingerprint image recorded in the fingerprint recording process, the electronic equipment can synthesize the second fingerprint image and all fingerprint images recorded before in the fingerprint recording process to obtain the quasi-fingerprint template.
For example, if the second fingerprint image is a fingerprint image recorded for the second time in the fingerprint recording process, the second fingerprint image and the fingerprint image recorded for the first time in the fingerprint recording process may be synthesized to obtain the quasi-fingerprint target. If the second fingerprint image is the fingerprint image recorded for the third time in the fingerprint recording process, the second fingerprint image, the fingerprint image recorded for the first time in the fingerprint recording process and the fingerprint image recorded for the second time can be synthesized to obtain the quasi-fingerprint target.
The electronic device determines whether the quasi-fingerprint template is complete 205. If yes, go to step 206; if not, go to step 207.
Wherein, the electronic device determines whether the quasi fingerprint template is complete, which may specifically be:
the electronic device detects whether the fingerprint area covered by the quasi-fingerprint template contains all necessary characteristic points. The essential feature points are feature points essential for fingerprint recognition. And if the template is not contained, determining that the quasi-fingerprint template is incomplete.
The electronic device takes the quasi-fingerprint template as a fingerprint template and stores it 206.
The stored fingerprint template can be used for fingerprint identification and comparison during fingerprint verification. For example, during fingerprint verification, the collected fingerprint image may be compared with the fingerprint template, and when the matching degree is greater than a certain threshold, it is determined that the fingerprint verification is successful.
And 207, the electronic equipment displays the first guide icon in the preset area and detects the next pressing operation aiming at the preset area.
If the quasi-fingerprint template is not complete, the fingerprint image needs to be recorded again, the next fingerprint image recording is continued, and the next fingerprint image recording process is executed.
As shown in fig. 2e, in the example of the fingerprint template entry process, disappearance of a first guide icon on a display screen of an electronic device is later than a time point of first fingerprint image collection, the electronic device collects a first fingerprint image, determines whether the first fingerprint image includes image information of the first guide icon according to comparison between the first guide icon and the first fingerprint image, filters the image information of the first guide icon from the first fingerprint image if the first fingerprint image includes the image information of the first guide icon, obtains a second fingerprint image, and generates a fingerprint template according to the second fingerprint image and a previously collected fingerprint image.
It can be seen that, in the embodiment of the application, the electronic device first displays a first guide icon in a preset area, and detects a pressing operation for the preset area, where the first guide icon is used for guiding a user to perform the pressing operation in the preset area; secondly, when the pressing operation aiming at the preset area is detected, acquiring a first fingerprint image and detecting whether the pressing operation is finished; then, after the pressing operation is finished, filtering non-real fingerprint information according to the first fingerprint image and the first guide icon to obtain a second fingerprint image; thirdly, if the second fingerprint image is not the fingerprint image recorded for the first time in the fingerprint recording process, synthesizing the second fingerprint image and the fingerprint image recorded before in the fingerprint recording process to obtain a quasi-fingerprint template; and finally, determining whether the quasi-fingerprint template is complete, and if so, taking the quasi-fingerprint template as the fingerprint template and storing the fingerprint template. As can be seen, in this example, the electronic device performs filtering on the unreal fingerprint information according to the first fingerprint image and the first guide icon to obtain a second fingerprint image, so that the fingerprint template does not contain the unreal fingerprint information, thereby avoiding a problem that the unreal fingerprint information is entered in the fingerprint entry process due to too late hiding time of the first guide icon caused by factors such as system jamming, and improving accuracy of the entered fingerprint template; the false reject rate of the fingerprint verification process can be reduced in the fingerprint verification process.
In one possible example, the filtering the non-authentic fingerprint information according to the first fingerprint image and the first guide icon to obtain a second fingerprint image includes:
acquiring the first guide icon;
comparing the first guide icon with the first fingerprint image, and determining whether the first fingerprint image comprises image information of the first guide icon;
if so, filtering the image information of the first guide icon from the first fingerprint image to obtain a second fingerprint image;
and if not, determining that the first fingerprint image is a second fingerprint image.
The first guide icon is a fingerprint UI icon, the first guide icon is drawn by the system, and the characteristic information electronic equipment can know the characteristic information in advance. The electronic device may determine whether the first fingerprint image includes the image information of the first guide icon, and determine whether the first fingerprint image includes the image information of the first guide icon based on the similarity.
In specific implementation, the electronic device acquires a first guide icon A, compares the first guide icon A with a first fingerprint graph B, determines that the first fingerprint graph B comprises the image information of the first fingerprint graph A, and filters the image information of the first fingerprint graph A from the first fingerprint graph B to obtain a second fingerprint graph C.
In this example, the electronic device performs non-authentic fingerprint information filtering on the fingerprint image by determining whether the first fingerprint image includes the image information of the first guide icon, which is beneficial to improving the accuracy of fingerprint input.
The filtering of the non-real fingerprint information according to the first fingerprint image and the first guide icon to obtain a second fingerprint image includes:
filtering the image information of the first guide icon from the first fingerprint image to obtain a second fingerprint image;
after the displaying the first guide icon in the preset area, the method further comprises:
determining a time point when the first guide icon disappears in the preset area;
determining a time point of the acquisition of the first fingerprint image;
and if the time point of the first guide icon disappearing in the preset area is later than the time point of acquiring the first fingerprint image, executing the step of filtering the image information of the first guide icon from the first fingerprint image to obtain a second fingerprint image.
In a specific implementation, the electronic device determines a time point at which the first guidance icon disappears in the preset area, specifically: the electronic equipment determines a time point of sending a first instruction for disappearing the first guide icon in the preset area; and the electronic equipment determines the time point of actually executing the first instruction, and the time point of actually executing the first instruction is determined as the time point of disappearance of the first guide icon in the preset area. Generally, the time point when the electronic device issues the first instruction for disappearing the first guide icon in the preset area is the same as the time point when the electronic device actually executes the first instruction, but if the system is stuck, the system delays to execute the first instruction, so that when the first instruction is actually executed, the system already starts to acquire the first fingerprint image, and image information of the first guide icon is mixed in the acquired first fingerprint image. At this time, the electronic device needs to filter the image information of the first guide icon from the first fingerprint image to obtain a second fingerprint image, obtain a fingerprint image without unreal fingerprint information, and improve the accuracy of fingerprint template entry.
Optionally, if the time point when the first guide icon disappears in the preset area is earlier than the time point when the first fingerprint image is collected, the image information of the first guide icon is filtered, so that the fingerprint input process can be accelerated.
In one possible example, the filtering image information of the first guide icon from the first fingerprint image to obtain a second fingerprint image includes:
acquiring a plurality of pixel points of the first guide icon mapped on the first fingerprint image;
and updating the gray information of the plurality of pixel points to the background gray information of the display screen to obtain a second fingerprint image.
In an overlapping area of an area where the first guide icon occupies the display screen and an area where the pressing operation is in contact with the display screen, a plurality of pixel points of the first guide icon mapped on the first fingerprint image can be acquired.
The background gray information of the display screen comprises the background gray information of the display screen when the pressing operation is executed. And updating the gray information of the pixel points into background gray information of the display screen, so that the gray information of the first guide icon can be removed, and the interference of the first guide icon on the acquired fingerprint image is avoided. The method is beneficial to reducing the noise influence of the image information of the preset area icon on the fingerprint image acquisition.
In one possible example, the filtering the image information of the first guide icon from the first fingerprint image to obtain a second fingerprint image includes:
determining that the first icon corresponds to a plurality of pixel points of the first fingerprint image;
calculating target gray information of each pixel point in the plurality of pixel points according to a preset gray calculation formula, wherein the preset gray calculation formula is as follows:
wherein X k Is the kth pixel point in the plurality of pixel points, and n is the pixel point X k F (X) of adjacent pixel points k ) Representing a pixel point X k Target gradation information of a ki Representing a pixel point X k The weight of the ith adjacent pixel point in the adjacent pixel points, and the adjacent pixel point and the pixel point X k Including the same edge or the same vertex;
and updating the first fingerprint image according to the calculated target gray scale information to obtain a second fingerprint image.
The weight can be divided into a pure fingerprint area, a noise fusion area and a background area according to the influence of different areas on fingerprint image acquisition, wherein the pure fingerprint area has the largest weight, the noise fusion area has the smallest weight, and the background area has the smallest weight.
In a specific implementation, the electronic device determines that the first guide icon a corresponds to a plurality of pixel points X1, X2, and X3 of the first fingerprint image B; and calculating target gray information of each pixel point in the plurality of pixel points according to a preset gray calculation formula to obtain target gray information Y1, Y2 and Y3, and updating the first fingerprint image according to the calculated target gray information by the electronic equipment to obtain a second fingerprint image C.
In this example, the electronic device calculates target gray scale information of each pixel point of the plurality of pixel points according to a preset gray scale calculation formula, and updates the first fingerprint image according to the calculated target gray scale information to obtain a second fingerprint image, which is beneficial to reducing noise influence of non-fingerprint information on a fingerprint input process and improving accuracy of fingerprint image input.
Referring to fig. 3, which is a schematic flow chart of another fingerprint template entry method provided in the embodiment of the present application, and is consistent with the embodiment shown in fig. 2a, fig. 3 is a schematic flow chart of the fingerprint template entry method, and is applied to the electronic device shown in fig. 1, a display screen of the electronic device includes a preset area for performing fingerprint identification, and the electronic device is provided with a fingerprint module corresponding to the preset area, as shown in the figure, the fingerprint template entry method includes:
301, in a fingerprint entry process, the electronic device displays a first guide icon in a preset area, and detects a pressing operation for the preset area, where the first guide icon is used to guide a user to perform the pressing operation in the preset area.
302, when detecting a pressing operation on a preset area, the electronic device collects a first fingerprint image and detects whether the pressing operation is finished.
303, after the pressing operation is finished, the electronic device filters the non-real fingerprint information according to the first fingerprint image and the first guide icon to obtain a second fingerprint image.
For specific implementation of steps 301 to 303, reference may be made to the description of steps 201 to 203, which is not described herein again.
304, if the second fingerprint image is the fingerprint image recorded for the first time in the fingerprint recording process, the electronic device determines whether the second fingerprint image is complete. If yes, go to step 305; if not, go to step 306.
The electronic device takes the second fingerprint image as a fingerprint template and stores 305.
And 306, the electronic device displays the first guide icon in the preset area and detects the next pressing operation aiming at the preset area.
If the second fingerprint image is incomplete, the fingerprint image needs to be recorded again, the next fingerprint image recording is continued, and the next fingerprint image recording process is executed.
It can be seen that, in the embodiment of the application, the electronic device first displays a first guide icon in the preset area, and detects a pressing operation for the preset area, where the first guide icon is used for guiding a user to perform the pressing operation in the preset area; secondly, when the pressing operation aiming at the preset area is detected, acquiring a first fingerprint image and detecting whether the pressing operation is finished; then, after the pressing operation is finished, filtering non-real fingerprint information according to the first fingerprint image and the first guide icon to obtain a second fingerprint image; thirdly, if the second fingerprint image is not the fingerprint image recorded for the first time in the fingerprint recording process, synthesizing the second fingerprint image and the fingerprint image recorded before in the fingerprint recording process to obtain a quasi-fingerprint template; and finally, determining whether the quasi fingerprint template is complete, and if so, taking the quasi fingerprint template as a fingerprint template and storing the fingerprint template. And if the second fingerprint image is the fingerprint image recorded for the first time in the fingerprint recording process, determining whether the second fingerprint image is complete, and if so, taking the second fingerprint image as a fingerprint template and storing the fingerprint template.
As can be seen, in this example, the electronic device performs filtering on the unreal fingerprint information according to the first fingerprint image and the first guide icon to obtain a second fingerprint image, so that the fingerprint template does not contain the unreal fingerprint information, thereby avoiding a problem that the unreal fingerprint information is entered in the fingerprint entry process due to too late hiding time of the first guide icon caused by factors such as system jamming, and improving accuracy of the entered fingerprint template; the false reject rate of the fingerprint verification process can be reduced in the fingerprint verification process.
Consistent with the embodiments shown in fig. 2a and fig. 3, please refer to fig. 4, where fig. 4 is a schematic structural diagram of an electronic device 400 provided in the embodiment of the present application, as shown in the drawing, a display screen of the electronic device 400 includes a preset area for performing fingerprint identification, the electronic device is provided with a fingerprint module with respect to the preset area, and further includes an application processor 410, a memory 420, a communication interface 430, and one or more programs 421, where the one or more programs 421 are stored in the memory 420 and configured to be executed by the application processor 410, and the one or more programs 421 include instructions for performing the following steps;
in the fingerprint input process, displaying a first guide icon in the preset area, and detecting the pressing operation aiming at the preset area, wherein the first guide icon is used for guiding a user to perform the pressing operation in the preset area;
when the pressing operation aiming at the preset area is detected, acquiring a first fingerprint image, and detecting whether the pressing operation is finished;
after the pressing operation is finished, filtering non-real fingerprint information according to the first fingerprint image and the first guide icon to obtain a second fingerprint image;
if the second fingerprint image is not the fingerprint image which is input for the first time in the fingerprint input process, synthesizing the second fingerprint image and the fingerprint image which is input before in the fingerprint input process to obtain a quasi-fingerprint template;
and determining whether the quasi fingerprint template is complete, and if so, taking the quasi fingerprint template as a fingerprint template and storing the fingerprint template.
It can be seen that, in the embodiment of the application, the electronic device first displays a first guide icon in the preset area, and detects a pressing operation for the preset area, where the first guide icon is used for guiding a user to perform the pressing operation in the preset area; secondly, when the pressing operation aiming at the preset area is detected, acquiring a first fingerprint image and detecting whether the pressing operation is finished; then, after the pressing operation is finished, filtering non-real fingerprint information according to the first fingerprint image and the first guide icon to obtain a second fingerprint image; thirdly, if the second fingerprint image is not the fingerprint image recorded for the first time in the fingerprint recording process, synthesizing the second fingerprint image and the fingerprint image recorded before in the fingerprint recording process to obtain a quasi-fingerprint template; and finally, determining whether the quasi-fingerprint template is complete, and if so, taking the quasi-fingerprint template as the fingerprint template and storing the fingerprint template. As can be seen, in this example, the electronic device performs filtering on the unreal fingerprint information according to the first fingerprint image and the first guide icon to obtain a second fingerprint image, so that the fingerprint template does not contain the unreal fingerprint information, thereby avoiding the problem that the unreal fingerprint information is entered in the fingerprint entry process due to too late hiding time of the first guide icon caused by factors such as system jamming and the like, and improving the accuracy of the entered fingerprint template; the false reject rate of the fingerprint verification process can be reduced in the fingerprint verification process.
In a possible example, the filtering of the non-authentic fingerprint information is performed according to the first fingerprint image and the first guide icon to obtain a second fingerprint image, and the instructions in the program 421 are specifically configured to perform the following operations: acquiring the first guide icon;
comparing the first guide icon with the first fingerprint image, and determining whether the first fingerprint image comprises image information of the first guide icon;
if so, filtering the image information of the first guide icon from the first fingerprint image to obtain a second fingerprint image;
and if not, determining that the first fingerprint image is a second fingerprint image.
In a possible example, the filtering of the non-authentic fingerprint information is performed according to the first fingerprint image and the first guide icon to obtain a second fingerprint image, and the instructions in the program 421 are specifically configured to perform the following operations: filtering the image information of the first guide icon from the first fingerprint image to obtain a second fingerprint image; after the first guide icon is displayed in the preset area, the instruction in the program 421 is specifically configured to perform the following operations: determining a time point when the first guide icon disappears in the preset area; determining a time point of the acquisition of the first fingerprint image; and if the time point of the first guide icon disappearing in the preset area is later than the time point of acquiring the first fingerprint image, performing the step of filtering the image information of the first guide icon from the first fingerprint image to obtain a second fingerprint image.
In a possible example, the filtering of the image information of the first guide icon from the first fingerprint image to obtain a second fingerprint image, and the instructions in the program 421 are specifically configured to perform the following operations: acquiring a plurality of pixel points of the first guide icon mapped on the first fingerprint image;
and updating the gray information of the plurality of pixel points to the background gray information of the display screen to obtain a second fingerprint image.
In a possible example, the filtering the image information of the first guide icon from the first fingerprint image to obtain a second fingerprint image, and the instructions in the program 421 are specifically configured to: determining that the first icon corresponds to a plurality of pixel points of the first fingerprint image;
calculating target gray information of each pixel point in the plurality of pixel points according to a preset gray calculation formula, wherein the preset gray calculation formula is as follows:
wherein X k Is the kth pixel point in the plurality of pixel points, and n is the pixel point X k F (X) of adjacent pixel points k ) Representing a pixel point X k Target gradation information of a ki Representing a pixel point X k The weight of the ith adjacent pixel point in the adjacent pixel points, and the adjacent pixel point and the pixel point X k Including the same edge or the same vertex; and updating the first fingerprint image according to the calculated target gray scale information to obtain a second fingerprint image.
In one possible example, the instructions in the program 421 are specifically configured to perform the following operations: and if the second fingerprint image is the fingerprint image which is recorded for the first time in the fingerprint recording process, determining whether the second fingerprint image is complete, and if so, taking the second fingerprint image as a fingerprint template and storing the fingerprint template.
In one possible example, the instructions in the program 421 are specifically configured to perform the following operations: and if the quasi-fingerprint template is incomplete, displaying the first guide icon in the preset area, and detecting the next pressing operation aiming at the preset area.
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-mentioned 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. 5 is a block diagram of functional units of a fingerprint template entry apparatus 500 according to an embodiment of the present application. The fingerprint template recording device 500 is applied to an electronic device, a display screen of the electronic device comprises a preset area for fingerprint identification, the electronic device is provided with a fingerprint module corresponding to the preset area, the fingerprint template recording device comprises a processing unit 501 and a communication unit 502, wherein,
the processing unit 501 is configured to, when a pressing operation for the preset area is detected, acquire a first fingerprint image, and detect whether the pressing operation is finished; the fingerprint sensor is used for carrying out non-real fingerprint information filtering according to the first fingerprint image and the first guide icon after the pressing operation is finished, so that a second fingerprint image is obtained; the fingerprint input device is used for inputting a first fingerprint image in a fingerprint input process, and is used for synthesizing the first fingerprint image with a second fingerprint image which is input before in the fingerprint input process under the condition that the second fingerprint image is not the first fingerprint image input in the fingerprint input process, so as to obtain a quasi-fingerprint template; and the fingerprint template storage module is used for determining whether the quasi fingerprint template is complete or not, and taking the quasi fingerprint template as a fingerprint template and storing the fingerprint template under the condition that the quasi fingerprint template is complete.
The fingerprint template entering apparatus 500 may further include a storage unit 503 for storing program codes and data of the electronic device. The processing unit 501 may be a processor, the communication unit 502 may be an internal communication interface, and the storage unit 503 may be a memory.
It can be seen that, in the embodiment of the application, the electronic device first displays a first guide icon in a preset area, and detects a pressing operation for the preset area, where the first guide icon is used for guiding a user to perform the pressing operation in the preset area; secondly, when the pressing operation aiming at the preset area is detected, acquiring a first fingerprint image and detecting whether the pressing operation is finished; then, after the pressing operation is finished, filtering non-real fingerprint information according to the first fingerprint image and the first guide icon to obtain a second fingerprint image; thirdly, if the second fingerprint image is not the fingerprint image recorded for the first time in the fingerprint recording process, synthesizing the second fingerprint image and the fingerprint image recorded before in the fingerprint recording process to obtain a quasi-fingerprint template; and finally, determining whether the quasi fingerprint template is complete, and if so, taking the quasi fingerprint template as a fingerprint template and storing the fingerprint template. As can be seen, in this example, the electronic device performs filtering on the unreal fingerprint information according to the first fingerprint image and the first guide icon to obtain a second fingerprint image, so that the fingerprint template does not contain the unreal fingerprint information, thereby avoiding the problem that the unreal fingerprint information is entered in the fingerprint entry process due to too late hiding time of the first guide icon caused by factors such as system jamming and the like, and improving the accuracy of the entered fingerprint template; the false reject rate of the fingerprint verification process can be reduced in the fingerprint verification process.
In a possible example, the processing unit 501 is specifically configured to perform non-authentic fingerprint information filtering according to the first fingerprint image and the first guide icon to obtain a second fingerprint image, and: acquiring the first guide icon; comparing the first guide icon with the first fingerprint image, and determining whether the first fingerprint image comprises image information of the first guide icon; under the condition that the first fingerprint image comprises the image information of the first guide icon, filtering the image information of the first guide icon from the first fingerprint image to obtain a second fingerprint image; and determining that the first fingerprint image is a second fingerprint image under the condition that the first fingerprint image does not include the image information of the first guide icon.
In a possible example, the processing unit 501 is specifically configured to perform non-authentic fingerprint information filtering according to the first fingerprint image and the first guide icon to obtain a second fingerprint image, and: filtering the image information of the first guide icon from the first fingerprint image to obtain a second fingerprint image; after the displaying the first guidance icon in the preset area, the processing unit 501 is further configured to: determining a time point when the first guide icon disappears in the preset area; determining a time point of the acquisition of the first fingerprint image; and under the condition that the time point of the first guide icon when the preset area disappears is later than the time point of acquiring the first fingerprint image, filtering the image information of the first guide icon from the first fingerprint image to obtain a second fingerprint image.
In a possible example, the processing unit 501 is specifically configured to filter image information of the first guide icon from the first fingerprint image to obtain a second fingerprint image, and to: acquiring a plurality of pixel points of the first guide icon mapped on the first fingerprint image; and updating the gray information of the plurality of pixel points to the background gray information of the display screen to obtain a second fingerprint image.
In one possible example, the first guide icon is a picture of a userInformation is filtered from the first fingerprint image to obtain a second fingerprint image, and the processing unit 501 is specifically configured to: determining that the first icon corresponds to a plurality of pixel points of the first fingerprint image; calculating target gray information of each pixel point in the plurality of pixel points according to a preset gray calculation formula, wherein the preset gray calculation formula is as follows:
wherein X k Is the kth pixel point in the plurality of pixel points, and n is the pixel point X k F (X) of adjacent pixel points k ) Representing a pixel point X k Target gradation information of a ki Representing a pixel point X k The weight of the ith adjacent pixel point in the adjacent pixel points, and the adjacent pixel point and the pixel point X k Including the same edge or the same vertex; and updating the first fingerprint image according to the calculated target gray scale information to obtain a second fingerprint image.
In one possible example, the processing unit 501 is further configured to: and under the condition that the second fingerprint image is the fingerprint image which is firstly recorded in the fingerprint recording process, determining whether the second fingerprint image is complete, and if so, taking the second fingerprint image as a fingerprint template and storing the fingerprint template.
In one possible example, the processing unit 501 is further configured to: and under the condition that the quasi-fingerprint template is not complete, displaying the first guide icon in the preset area, and detecting the next pressing operation aiming at the preset area.
Embodiments of the present application also provide a computer storage medium, where the computer storage medium stores a computer program for electronic data exchange, the computer program enabling 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 an electronic device.
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 an electronic device.
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 apparatus embodiments are merely illustrative, and for example, the division of the above-described units is only one type of logical functional division, and other divisions may be realized in practice, for example, multiple 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 coupling or direct coupling or communication connection between each other may be through some interfaces, indirect coupling or communication connection between devices or units, and may be in an electrical 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 may be stored in a computer readable memory if it is implemented in the form of a software functional unit and sold or used as a stand-alone product. 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: a U-disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic or optical disk, and other various media capable of storing program codes.
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 Memory disks, read-Only memories (ROMs), random Access Memories (RAMs), magnetic or optical disks, 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. The utility model provides a fingerprint template type-in method, its characterized in that is applied to electronic equipment, electronic equipment's display screen is including being used for carrying out fingerprint identification's preset area, electronic equipment is relative preset area is provided with the fingerprint module, the method includes:
in the fingerprint input process, displaying a first guide icon in the preset area, and detecting the pressing operation aiming at the preset area, wherein the first guide icon is used for guiding a user to perform the pressing operation in the preset area;
when the pressing operation aiming at the preset area is detected, acquiring a first fingerprint image, and detecting whether the pressing operation is finished;
after the pressing operation is finished, acquiring the first guide icon;
comparing the first guide icon with the first fingerprint image, and determining whether the first fingerprint image comprises image information of the first guide icon;
if so, filtering the image information of the first guide icon from the first fingerprint image to obtain a second fingerprint image;
if the second fingerprint image is not the fingerprint image recorded for the first time in the fingerprint recording process, synthesizing the second fingerprint image with the fingerprint image recorded before in the fingerprint recording process to obtain a quasi-fingerprint template;
determining whether the quasi fingerprint template is complete, and if so, taking the quasi fingerprint template as a fingerprint template and storing the fingerprint template;
the filtering the image information of the first guide icon from the first fingerprint image to obtain a second fingerprint image includes: determining that the first guide icon corresponds to a plurality of pixel points of the first fingerprint image;
calculating target gray information of each pixel point in the plurality of pixel points according to a preset gray calculation formula, wherein the preset gray calculation formula is as follows:
wherein X k Is the kth pixel point in the plurality of pixel points, and n is the pixel point X k F (X) of adjacent pixel points k ) Representing a pixel point X k Target gradation information of a ki Representing a pixel point X k The weight of the ith adjacent pixel point in the adjacent pixel points, and the adjacent pixel point and the pixel point X k Including the same edge or the same vertex;
and updating the first fingerprint image according to the calculated target gray scale information to obtain a second fingerprint image.
2. The method of claim 1, wherein after the displaying the first guide icon in the preset area, the method further comprises:
determining a time point when the first guide icon disappears in the preset area;
determining a time point of the acquisition of the first fingerprint image;
and if the time point of the first guide icon disappearing in the preset area is later than the time point of acquiring the first fingerprint image, executing the step of filtering the image information of the first guide icon from the first fingerprint image to obtain a second fingerprint image.
3. The method according to any one of claims 1 to 2, further comprising:
and if the second fingerprint image is the fingerprint image which is recorded for the first time in the fingerprint recording process, determining whether the second fingerprint image is complete, and if so, taking the second fingerprint image as a fingerprint template and storing the fingerprint template.
4. The method according to any one of claims 1 to 2, further comprising:
and if the quasi-fingerprint template is incomplete, displaying the first guide icon in the preset area, and detecting the next pressing operation aiming at the preset area.
5. A fingerprint template inputting device is characterized by being applied to electronic equipment, wherein a display screen of the electronic equipment comprises a preset area for fingerprint identification, and the electronic equipment is provided with a fingerprint module relative to the preset area; the fingerprint template entry device comprises a processing unit, wherein:
the processing unit is used for collecting a first fingerprint image when the pressing operation aiming at the preset area is detected, and detecting whether the pressing operation is finished; the first guide icon is acquired after the pressing operation is finished; comparing the first guide icon with the first fingerprint image, and determining whether the first fingerprint image comprises image information of the first guide icon; under the condition that the first fingerprint image comprises the image information of the first guide icon, filtering the image information of the first guide icon from the first fingerprint image to obtain a second fingerprint image; the fingerprint input device is used for inputting a first fingerprint image in a fingerprint input process, and is used for synthesizing the first fingerprint image with a second fingerprint image which is input before in the fingerprint input process under the condition that the second fingerprint image is not the first fingerprint image input in the fingerprint input process, so as to obtain a quasi-fingerprint template; the fingerprint identification system is used for determining whether the quasi fingerprint template is complete or not, and taking the quasi fingerprint template as a fingerprint template and storing the fingerprint template under the condition that the quasi fingerprint template is complete;
the processing unit filters the image information of the first guide icon from the first fingerprint image to obtain a second fingerprint image, and the method comprises the following steps: determining that the first guide icon corresponds to a plurality of pixel points of the first fingerprint image;
calculating target gray information of each pixel point in the plurality of pixel points according to a preset gray calculation formula, wherein the preset gray calculation formula is as follows:
wherein X k Is the kth pixel point in the plurality of pixel points, and n is the pixel point X k F (X) of adjacent pixel points k ) Representing a pixel point X k Target gradation information of a ki Representation imagePrime point X k The weight of the ith adjacent pixel point in the adjacent pixel points, and the adjacent pixel point and the pixel point X k Including the same edge or the same vertex;
and updating the first fingerprint image according to the calculated target gray scale information to obtain a second fingerprint image.
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 of the method of any of claims 1-4.
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 to 4.
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| CN106557755B (en) * | 2016-11-24 | 2021-05-04 | 北京小米移动软件有限公司 | Fingerprint template acquisition method and device |
| CN107132946A (en) * | 2017-04-26 | 2017-09-05 | 深圳市万普拉斯科技有限公司 | Fingerprint recognition based reminding method, device, storage medium and computer equipment |
| CN109657562B (en) * | 2018-11-27 | 2022-12-27 | Oppo广东移动通信有限公司 | Fingerprint input method and related equipment |
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| CN108701218A (en) * | 2017-02-03 | 2018-10-23 | 华为技术有限公司 | A kind of method, apparatus and terminal of fingerprint collecting |
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