CN110390296B - Fingerprint identification method and related product - Google Patents
Fingerprint identification method and related product Download PDFInfo
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- CN110390296B CN110390296B CN201910667172.7A CN201910667172A CN110390296B CN 110390296 B CN110390296 B CN 110390296B CN 201910667172 A CN201910667172 A CN 201910667172A CN 110390296 B CN110390296 B CN 110390296B
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Abstract
The embodiment of the application discloses a fingerprint identification method and a related product, which are applied to electronic equipment, wherein the electronic equipment comprises an ultrasonic module and a display screen, and the ultrasonic module is arranged below the display screen; the method comprises the following steps: when a target object contacts the display screen, detecting the shortest distance between the target object and a preset fingerprint acquisition area, wherein the target object is not located in the preset fingerprint acquisition area, and the preset fingerprint acquisition area corresponds to a partial display area of the display screen; when the shortest distance is within a preset range, processing the preset fingerprint acquisition area to obtain a target fingerprint acquisition area, wherein the target object is in the target fingerprint acquisition area; and acquiring a fingerprint of the target object in the target fingerprint acquisition area through the ultrasonic module to obtain a target fingerprint image. By adopting the fingerprint acquisition method and device, fingerprint acquisition efficiency can be improved.
Description
Technical Field
The application relates to the technical field of electronic equipment, in particular to a fingerprint identification method and a related product.
Background
With the widespread use of electronic devices (such as mobile phones, tablet computers, and the like), the electronic devices have more and more applications and more powerful functions, and the electronic devices are developed towards diversification and personalization, and become indispensable electronic products in the life of users.
The fingerprint identification technology also becomes the standard configuration technology of electronic equipment, and along with the development of fingerprint identification technology, at present, regional fingerprint identification technology is more and more popular, but sometimes the user has not carried out fingerprint input in the fingerprint identification region yet, then can't gather the fingerprint image, has reduced fingerprint collection efficiency.
Disclosure of Invention
The embodiment of the application provides a fingerprint identification method and a related product, and fingerprint acquisition efficiency is improved.
In a first aspect, an embodiment of the present application provides an electronic device, which includes a processing circuit, and an ultrasonic module and a display screen connected to the processing circuit, the ultrasonic module being disposed below the display screen,
the display screen is used for detecting the shortest distance between a target object and a preset fingerprint acquisition area when the target object contacts the display screen, wherein the target object is not located in the preset fingerprint acquisition area, and the preset fingerprint acquisition area corresponds to a part of display area of the display screen;
the processing circuit is used for processing the preset fingerprint acquisition area when the shortest distance is within a preset range to obtain a target fingerprint acquisition area, and the target object is located in the target fingerprint acquisition area;
the ultrasonic module is used for acquiring the fingerprint of the target object in the target fingerprint acquisition area to obtain a target fingerprint image.
In a second aspect, an embodiment of the present application provides a fingerprint identification method, which is applied to an electronic device, where the electronic device includes an ultrasonic module and a display screen, and the ultrasonic module is disposed below the display screen; the method comprises the following steps:
when a target object contacts the display screen, detecting the shortest distance between the target object and a preset fingerprint acquisition area, wherein the target object is not located in the preset fingerprint acquisition area, and the preset fingerprint acquisition area corresponds to a partial display area of the display screen;
when the shortest distance is in a preset range, processing the preset fingerprint acquisition area to obtain a target fingerprint acquisition area, wherein the target object is in the target fingerprint acquisition area;
and acquiring a fingerprint of the target object in the target fingerprint acquisition area through the ultrasonic module to obtain a target fingerprint image.
In a third aspect, an embodiment of the present application provides a fingerprint identification device, which is applied to an electronic device, where the electronic device includes an ultrasonic module and a display screen, and the ultrasonic module is disposed below the display screen; the device comprises: a detection unit, a processing unit and an acquisition unit, wherein,
the detection unit is used for detecting the shortest distance between a target object and a preset fingerprint acquisition area when the target object contacts the display screen, wherein the target object is not located in the preset fingerprint acquisition area, and the preset fingerprint acquisition area corresponds to a part of display area of the display screen;
the processing unit is used for processing the preset fingerprint acquisition area when the shortest distance is in a preset range to obtain a target fingerprint acquisition area, and the target object is in the target fingerprint acquisition area;
the acquisition unit is used for acquiring fingerprints of the target object in the target fingerprint acquisition area through the ultrasonic module to obtain a target fingerprint image.
In a fourth 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 the steps in the second aspect of the embodiment of the present application.
In a fifth 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 some or all of the steps described in the second aspect of the present application.
In a sixth aspect, embodiments of the present application provide a computer program product, where the computer program product includes a non-transitory computer-readable storage medium storing a computer program, where the computer program is operable to cause a computer to perform some or all of the steps as described in the second aspect of embodiments of the present application. The computer program product may be a software installation package.
The embodiment of the application has the following beneficial effects:
it can be seen that the fingerprint identification method and the related product described in the embodiments of the present application, the application is applied to an electronic device, the electronic device includes an ultrasonic module and a display screen, the ultrasonic module is disposed below the display screen, when a target object contacts the display screen, a shortest distance between the target object and a preset fingerprint collection area is detected, the target object is not in the preset fingerprint collection area, the preset fingerprint collection area corresponds to a partial display area of the display screen, when the shortest distance is in a preset range, the preset fingerprint collection area is processed to obtain the target fingerprint collection area, the target object is in the target fingerprint collection area, the target object is subjected to fingerprint collection in the target fingerprint collection area through the ultrasonic module to obtain a target fingerprint image, when a finger does not press the fingerprint collection area, the processed fingerprint collection area can cover the finger through a certain processing mode, thereby, the fingerprint image can be collected, and the fingerprint collection efficiency is improved.
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. 1A is a schematic structural diagram of an electronic device according to an embodiment of the present disclosure;
fig. 1B is a schematic structural diagram of another electronic device provided in the embodiment of the present application;
fig. 1C is a schematic flowchart of a fingerprint identification method according to an embodiment of the present application;
fig. 1D is a schematic diagram illustrating a fingerprint collection area according to an embodiment of the present application;
FIG. 2 is a schematic flowchart of another fingerprint identification method provided in an embodiment of the present application;
fig. 3 is a schematic structural diagram of an electronic device according to an embodiment of the present application;
FIG. 4A is a block diagram illustrating functional units of a fingerprint recognition device according to an embodiment of the present application;
FIG. 4B is a block diagram illustrating functional units of another fingerprint identification device according to an embodiment of the present application;
fig. 4C is a block diagram illustrating functional units of another fingerprint identification device 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 terms "first," "second," and the like in the description and claims of the present application and in the above-described drawings are used for distinguishing between different objects and not for describing a particular order. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.
The electronic device related to the embodiments of the present application may include various handheld devices, vehicle-mounted devices, wearable devices (smart watch, smart band, wireless headset, augmented reality/virtual reality device, smart glasses), computing devices or other processing devices connected to a wireless modem, and various forms of User Equipment (UE), mobile Station (MS), terminal equipment (terminal device), and the like, which have wireless communication functions. For convenience of description, the above-mentioned devices are collectively referred to as electronic devices.
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, where the electronic device 100 includes a storage and processing circuit 110, and a sensor 170 connected to the storage and processing circuit 110, where:
the electronic device 100 may include control circuitry that may include storage and processing circuitry 110. The storage and processing circuitry 110 may be memory, such as hard disk drive memory, non-volatile memory (e.g., flash memory or other electronically programmable read-only memory used to form a solid state drive, etc.), volatile memory (e.g., static or dynamic random access memory, etc.), etc., and embodiments of the present application are not limited thereto. Processing circuitry in storage and processing circuitry 110 may be used to control the operation of electronic device 100. The processing circuitry may be implemented based on one or more microprocessors, microcontrollers, digital signal processors, baseband processors, power management units, audio codec chips, application specific integrated circuits, display driver integrated circuits, and the like.
The storage and processing circuitry 110 may be used to run software in the electronic device 100, such as an Internet browsing application, a Voice Over Internet Protocol (VOIP) telephone call application, an email application, a media playing application, operating system functions, and so forth. Such software may be used to perform control operations such as, for example, camera-based image capture, ambient light measurement based on an ambient light sensor, proximity sensor measurement based on a proximity sensor, information display functionality based on status indicators such as status indicator lights of light emitting diodes, touch event detection based on a touch sensor, functionality associated with displaying information on multiple (e.g., layered) display screens, operations associated with performing wireless communication functions, operations associated with collecting and generating audio signals, control operations associated with collecting and processing button press event data, and other functions in the electronic device 100, and the like, without limitation.
The electronic device 100 may include input-output circuitry 150. The input-output circuit 150 may be used to enable the electronic device 100 to input and output data, i.e., to allow the electronic device 100 to receive data from an external device and also to allow the electronic device 100 to output data from the electronic device 100 to the external device. The input-output circuit 150 may further include a sensor 170. The sensor 170 may include an ultrasonic module, and may further include an ambient light sensor, a proximity sensor based on light and capacitance, a touch sensor (for example, based on a light touch sensor and/or a capacitive touch sensor, where the touch sensor may be a part of a touch display screen, or may be used independently as a touch sensor structure), an acceleration sensor, a temperature sensor, and other sensors, and the ultrasonic module may be integrated below the screen, which is not limited herein, and may be used to collect a fingerprint image, and the temperature sensor may be used to detect a battery temperature.
Input-output circuit 150 may also include one or more display screens, such as display screen 130. The display 130 may include one or a combination of liquid crystal display, organic light emitting diode display, electronic ink display, plasma display, display using other display technologies. The display screen 130 may include an array of touch sensors (i.e., the display screen 130 may be a touch display screen). The touch sensor may be a capacitive touch sensor formed by a transparent touch sensor electrode (e.g., an Indium Tin Oxide (ITO) electrode) array, or may be a touch sensor formed using other touch technologies, such as acoustic wave touch, pressure sensitive touch, resistive touch, optical touch, and the like, and the embodiments of the present application are not limited thereto.
The electronic device 100 may also include an audio component 140. The audio component 140 may be used to provide audio input and output functionality for the electronic device 100. The audio components 140 in the electronic device 100 may include a speaker, a microphone, a buzzer, a tone generator, and other components for generating and detecting sound.
The communication circuit 120 may be used to provide the electronic device 100 with the capability to communicate with external devices. The communication circuit 120 may include analog and digital input-output interface circuits, and wireless communication circuits based on radio frequency signals and/or optical signals. The wireless communication circuitry in communication circuitry 120 may include radio-frequency transceiver circuitry, power amplifier circuitry, low noise amplifiers, switches, filters, and antennas. For example, the wireless Communication circuitry in Communication circuitry 120 may include circuitry to support Near Field Communication (NFC) by transmitting and receiving Near Field coupled electromagnetic signals. For example, the communication circuit 120 may include a near field communication antenna and a near field communication transceiver. The communications circuitry 120 may also include a cellular telephone transceiver and antenna, a wireless local area network transceiver circuitry and antenna, and so forth.
The electronic device 100 may further include a battery, power management circuitry, and other input-output units 160. The input-output unit 160 may include buttons, joysticks, click wheels, scroll wheels, touch pads, keypads, keyboards, cameras, light emitting diodes and other status indicators, and the like.
A user may input commands through input-output circuitry 150 to control operation of electronic device 100, and may use output data of input-output circuitry 150 to enable receipt of status information and other outputs from electronic device 100.
In a possible example, taking the ultrasonic module located below the screen as an example, as shown in fig. 1B, fig. 1B is a schematic structural diagram of an electronic device, and the electronic device 100 may include a Glass Cover plate (Cover Glass) 210, a display screen (OLED) 220, an Adhesive layer (Adhesive) 230, a substrate (TFT Glass) 240, a Pixel layer (Pixel) 250, a piezoelectric material layer (polymer) 260, an Ag Ink layer 270, and a solidified Adhesive layer (DAF) 280. Of course, the glass cover plate may further include a film layer (film), which may be a tempered film for protecting the display screen of the electronic device.
Further, the ultrasonic module may include: the TFT Glass layer, the Pixel layer, the Ag Ink layer and the solidification glue layer. The TFT Glass layer is used for metal wiring and material coating; the Pixel layer is used for embedding a Metal electrode on the TFT Glass, is used as a cathode for ultrasonic transmission/reception and is also called a piezoelectric transduction material, and can realize material deformation-voltage interconversion; an Ag Ink layer used as a positive electrode for ultrasonic transmission/reception; the DAF is solidified glue and is used for protecting the ultrasonic module; the Adhesive layer is the Adhesive which stands the ultrasonic module at the bottom of the OLED screen.
In a specific implementation, the ultrasound module may include 2 states, a TX state (for transmitting ultrasound) and an RX state (for receiving ultrasound).
In a TX state, high-frequency (usually 10MHz level) oscillation signals such as sine waves are provided through electrodes (a Pixel negative electrode and an Ag Ink positive electrode) at two ends of a Copolymer (piezoelectric material), the Copolymer can generate vibration of response frequency and emit ultrasonic waves, the ultrasonic waves transmitted upwards reach fingerprints in contact with the surface of a screen after penetrating through an OLED screen, and when fingerprint valley ridges are attached to the screen, the difference between the acoustic resistance characteristic of air in the fingerprint valleys and the acoustic resistance characteristic of glass on the surface of the screen is large, the difference between the acoustic resistance characteristic of skin tissues of the fingerprint ridges and the acoustic resistance characteristic of glass on the surface of the screen is large, so the intensity of ultrasonic reflection signals of the fingerprint valley ridges is different.
In an RX state, after reflected ultrasonic waves pass through the display screen again and reach the ultrasonic module (Pixel-Copolymer-Ag Ink), the Copolymer is caused to vibrate to generate an electric signal, the vibration intensity of the Copolymer in Pixel areas corresponding to fingerprint ridges at different positions is different, so that potential differences received by the pixels at different positions are different (the Ag Ink is equal potential), the potential differences are converted into two-dimensional image signals, and an ultrasonic fingerprint image is obtained.
Based on the electronic device described in fig. 1A and fig. 1B, the following functions may be implemented:
the display screen is used for detecting the shortest distance between a target object and a preset fingerprint acquisition area when the target object contacts the display screen, wherein the target object is not located in the preset fingerprint acquisition area, and the preset fingerprint acquisition area corresponds to a part of display area of the display screen;
the processing circuit is used for processing the preset fingerprint acquisition area when the shortest distance is in a preset range to obtain a target fingerprint acquisition area, and the target object is in the target fingerprint acquisition area;
the ultrasonic module is used for acquiring the fingerprint of the target object in the target fingerprint acquisition area to obtain a target fingerprint image.
In a possible example, in the aspect of processing the preset fingerprint acquisition area to obtain the target fingerprint acquisition area, the processing circuit is specifically configured to:
determining a touch area corresponding to the target object;
determining a center point of the touch area;
determining a shortest line segment between the target object and the preset fingerprint acquisition area, wherein the shortest line segment comprises a first endpoint and a second endpoint, the first endpoint belongs to the touch area, and the second endpoint belongs to the preset fingerprint acquisition area;
determining a target vector of the second endpoint pointing to the center point;
and carrying out translation processing on the preset fingerprint acquisition area according to the target vector to obtain the target fingerprint acquisition area.
In a possible example, in the aspect of processing the preset fingerprint acquisition area to obtain the target fingerprint acquisition area, the processing circuit is specifically configured to:
determining a touch area corresponding to the target object;
determining a center point of the touch area;
determining the shortest distance between the central point and the preset fingerprint acquisition area;
and amplifying the preset fingerprint acquisition area based on the shortest distance to obtain the target fingerprint acquisition area.
In one possible example, the display screen is further specifically configured to:
and when the shortest distance exceeds the upper limit value of the preset range, highlighting the preset fingerprint acquisition area to prompt the fingerprint input of the preset fingerprint acquisition area.
In one possible example, the processing circuit is further specifically configured to:
acquiring a target fingerprint identification corresponding to the target fingerprint image, wherein the target fingerprint identification is used for identifying which finger the target fingerprint image specifically comes from;
acquiring a preset fingerprint template corresponding to the target fingerprint identification;
matching the target fingerprint image with the preset fingerprint template;
and when the target fingerprint image is successfully matched with the preset fingerprint template, executing target operation corresponding to the target fingerprint identification.
It can be seen that, the electronic equipment described in the embodiment of the application, this electronic equipment includes ultrasonic wave module and display screen, the ultrasonic wave module sets up in the display screen below, when the target object contacts the display screen, detect the target object and predetermine the shortest distance between the fingerprint collection region, the target object is not in predetermine the fingerprint collection region, predetermine the partial display area that the fingerprint collection region corresponds the display screen, when the shortest distance is in predetermine the scope, handle predetermine the fingerprint collection region, obtain the target fingerprint collection region, the target object is in the target fingerprint collection region, carry out fingerprint collection at the target fingerprint collection region through the ultrasonic wave module to the target object, obtain the target fingerprint image, can be when the fingerprint collection region is not pressed to the finger, through certain processing method, can cover the finger with the fingerprint collection region after handling, thereby, can gather the fingerprint image, fingerprint collection efficiency has been promoted.
Referring to fig. 1C, fig. 1C is a schematic flowchart of a fingerprint identification method provided in an embodiment of the present application, and as shown in the drawing, the method is applied to the electronic device shown in fig. 1A, where the electronic device includes an ultrasonic module and a display screen, and the ultrasonic module is disposed below the display screen; the fingerprint identification method comprises the following steps:
101. when a target object contacts the display screen, detecting the shortest distance between the target object and a preset fingerprint acquisition area, wherein the target object is not located in the preset fingerprint acquisition area, and the preset fingerprint acquisition area corresponds to a partial display area of the display screen.
In the embodiment of this application, the ultrasonic wave module can realize full-screen fingerprint identification function, and whole display screen all can be used for realizing the fingerprint collection promptly, and perhaps, regional fingerprint identification function, the partial region of display screen can realize the fingerprint collection promptly. The preset fingerprint acquisition area can be set by a user or defaulted by a system, and the preset fingerprint acquisition area corresponds to a partial display area of the display screen.
Wherein, the ultrasonic wave module can be integrated in the display screen below, as shown in fig. 1D, the ultrasonic wave module corresponds fingerprint collection region, and fingerprint collection region corresponds the touch-control region of whole or partial display screen, and fingerprint collection region can realize carrying out fingerprint collection to one or more fingers. Touch-control is regional to or is close the touch-control of the display screen that the fingerprint collection area corresponds at the finger, then electronic equipment can carry out the fingerprint collection through the ultrasonic wave module, obtains target fingerprint image. The target object may be a finger or other object. The display screen can be a touch display screen, when a target object touches the display screen, the shortest distance between the target object and a preset fingerprint acquisition area can be detected through the touch display screen, the target object is not in the preset fingerprint acquisition area (namely, no intersection point exists between a touch area corresponding to the target object and the preset fingerprint acquisition area), and the preset fingerprint acquisition area corresponds to a partial display area of the display screen.
102. And when the shortest distance is within a preset range, processing the preset fingerprint acquisition area to obtain a target fingerprint acquisition area, wherein the target object is in the target fingerprint acquisition area.
Wherein the treatment may be at least one of: translation, rotation, magnification, modification, and the like, without limitation. The above modification may be understood as that the shape of the preset fingerprint acquisition area is changed, for example, the original preset fingerprint acquisition area is rectangular, and the modified preset fingerprint acquisition area may be circular. The preset range can be set by the user or the default of the system. In specific implementation, when the shortest distance is within a preset range, the electronic device may process, for example, amplify or translate the preset fingerprint acquisition area to obtain a target fingerprint acquisition area, and a touch area corresponding to the target object may be partially or entirely located in the target fingerprint acquisition area.
In a possible example, in step 102, processing the preset fingerprint acquisition area to obtain the target fingerprint acquisition area may include the following steps:
a21, determining a touch area corresponding to the target object;
a22, determining a central point of the touch area;
determining a shortest line segment between the target object and the preset fingerprint acquisition area, wherein the shortest line segment comprises a first endpoint and a second endpoint, the first endpoint belongs to the touch area, and the second endpoint belongs to the preset fingerprint acquisition area;
a24, determining a target vector of the second endpoint pointing to the central point;
and A25, carrying out translation processing on the preset fingerprint acquisition area according to the target vector to obtain the target fingerprint acquisition area.
When the target object touches the display screen, the electronic device may determine a touch area of the target object, may determine a central point of the touch area in a geometric manner, and may determine a shortest line segment between the target object and the preset fingerprint acquisition area, where the shortest line segment includes a first endpoint and a second endpoint, the first endpoint is a point (boundary point) on the touch area, and the second endpoint is a boundary point of the preset fingerprint acquisition area.
In a possible example, in step 102, processing the preset fingerprint acquisition area to obtain the target fingerprint acquisition area may include the following steps:
b21, determining a touch area corresponding to the target object;
b22, determining the central point of the touch area;
b23, determining the shortest distance between the central point and the preset fingerprint acquisition area;
and B24, amplifying the preset fingerprint acquisition area based on the shortest distance to obtain the target fingerprint acquisition area.
In a specific implementation, when a target object touches a display screen, an electronic device may determine a touch area of the target object, a central point of the touch area may be determined in a geometric manner, the electronic device may also determine a shortest distance between the central point and a preset fingerprint acquisition area, and further, the preset fingerprint acquisition area may be amplified based on the shortest distance to obtain the target fingerprint acquisition area.
103. And acquiring a fingerprint of the target object in the target fingerprint acquisition area through the ultrasonic module to obtain a target fingerprint image.
The target object is located in the target fingerprint acquisition area, so that a fingerprint image can be acquired, specifically, the electronic device can acquire the target fingerprint image through the ultrasonic module to the target fingerprint acquisition area, and the target fingerprint image can be used as a fingerprint template or used for realizing fingerprint unlocking subsequently.
In a possible example, in step 103, performing fingerprint acquisition on the target object in the target fingerprint acquisition area through the ultrasonic module to obtain a target fingerprint image, may include the following steps:
31. acquiring target touch parameters aiming at the display screen;
32. determining a target working parameter corresponding to the target touch parameter according to a mapping relation between a preset touch parameter and a working parameter of the ultrasonic fingerprint identification module;
33. and controlling the ultrasonic fingerprint identification module to perform fingerprint acquisition according to the target working parameters to obtain the target fingerprint image.
The touch parameter may be at least one of the following: the touch strength of the touch display screen, the touch time of the touch display screen, the touch area of the touch display screen, the number of touch points of the touch display screen, and the like, which are not limited herein. The working parameters of the ultrasonic fingerprint identification module can be at least one of the following: the transmitting power of ultrasonic fingerprint identification module, the operating frequency of ultrasonic fingerprint identification module, the operating current of ultrasonic fingerprint identification module, the operating voltage of ultrasonic fingerprint identification module and the operating power of ultrasonic fingerprint identification module etc. do not do the restriction here.
In specific implementation, a mapping relation between a preset touch parameter and a working parameter of the ultrasonic fingerprint identification module can be stored in the electronic device in advance, the electronic device can acquire a target touch parameter for the display screen, the target working parameter corresponding to the target touch parameter is determined according to the mapping relation, and fingerprint collection is performed according to the target working parameter to obtain a target fingerprint image. Because the working parameter of ultrasonic fingerprint identification module is closely relevant with the touch-control parameter, consequently, can obtain the working parameter who corresponds with the touch-control operation and carry out fingerprint collection, obtain the better fingerprint image of image quality, for example, the touch-control dynamics is too light, and probably the fingerprint detail is unclear, then can promote fingerprint image quality to a certain extent through the transmitted power who promotes the ultrasonic fingerprint identification module.
In one possible example, the following steps may be further included:
and when the shortest distance exceeds the upper limit value of the preset range, highlighting the preset fingerprint acquisition area to prompt the fingerprint input of the preset fingerprint acquisition area.
The above-mentioned highlighting mode may be highlighting, or special effect display, or the preset fingerprint acquisition area is in a black screen state, and other areas are in a bright screen state, and so on, and is not limited herein, and in the specific implementation, when the shortest distance exceeds the upper limit value of the preset range, the preset fingerprint acquisition area may be highlighted to prompt the preset fingerprint acquisition area to perform fingerprint input.
In one possible example, after the step 103, the following steps may be further included:
c1, acquiring a target fingerprint identification corresponding to the target fingerprint image, wherein the target fingerprint identification is used for identifying which finger the target fingerprint image specifically comes from;
c2, acquiring a preset fingerprint template corresponding to the target fingerprint identification;
c3, matching the target fingerprint image with the preset fingerprint template;
and C4, when the target fingerprint image is successfully matched with the preset fingerprint template, executing target operation corresponding to the target fingerprint identification.
According to the above description, the ultrasonic module can not only collect fingerprints, but also collect the contours of the user's hand, and can determine which finger is, for example, the left thumb and the right thumb, according to the contours of the fingers, and the electronic device can also pre-store the mapping relationship between the fingerprint identifiers and the operations, and the different fingerprint identifiers correspond to different operations, and the target operation may be at least one of starting application operation, closing application operation, payment operation, deletion operation, photographing operation, storage operation, enlargement operation, copying operation, cutting operation, unlocking operation, encryption operation, and the like, which is not limited herein. In specific implementation, the electronic device can acquire a target fingerprint identifier corresponding to a target fingerprint image, where the target fingerprint identifier is used to identify which finger the target fingerprint image comes from, a fingerprint template set can be pre-stored in the electronic device, where the fingerprint template set includes a plurality of fingerprint templates, each fingerprint template corresponds to one fingerprint identifier, and then a preset fingerprint template corresponding to the target fingerprint identifier can be selected, further, the target fingerprint image can be matched with the preset fingerprint template, when the target fingerprint image is successfully matched with the preset fingerprint template, a target operation corresponding to the target fingerprint identifier can be executed, otherwise, a failure of fingerprint identification of a user is prompted.
In a possible example, in the step C3, matching the target fingerprint image with the preset fingerprint template may include the following steps:
c31, carrying out image segmentation on the target fingerprint image to obtain a target fingerprint area image;
c32, analyzing the distribution of the characteristic points of the target fingerprint area image;
c33, performing circular image interception on the target fingerprint area image according to M different circle centers to obtain M circular fingerprint area images, wherein M is an integer larger than 3;
c34, selecting a target circular fingerprint area image from the M circular fingerprint area images, wherein the number of characteristic points contained in the target circular fingerprint area image is larger than that of other circular fingerprint area images in the M circular fingerprint area images;
c35, dividing the target circular fingerprint area image to obtain N circular rings, wherein the widths of the N circular rings are the same;
c36, starting from the ring with the smallest radius in the N rings, sequentially matching the N rings with the preset fingerprint template for feature points, and accumulating the matching values of the matched rings;
and C37, immediately stopping matching the feature points when the accumulated matching value is greater than the target fingerprint identification threshold value, and outputting a prompt message of successful fingerprint identification.
The electronic equipment can perform image segmentation on a target fingerprint image to obtain a target fingerprint area image, further analyze the distribution of characteristic points of the target fingerprint area image, perform circular image interception on the target fingerprint area image according to M different circle centers to obtain M circular fingerprint area images, wherein M is an integer greater than 3, select the target circular fingerprint area image from the M circular fingerprint area images, the number of the characteristic points contained in the target circular fingerprint area image is greater than that of other circular fingerprint area images in the M circular fingerprint area images, divide the target circular fingerprint area image to obtain N circular rings, the ring widths of the N circular rings are the same, start from the circular ring with the smallest radius in the N circular rings, sequentially perform characteristic point matching on the N circular rings with a preset fingerprint template, and accumulate matching values of the matched circular rings, so that in a fingerprint identification process, the characteristic points of different positions or different fingerprints can be used for matching, equivalently sample the whole fingerprint image, and the sampling can cover the whole fingerprint area, thereby, corresponding accumulated representative point matching can be found from each fingerprint area to be used for immediately performing accurate identification, and the accurate identification of the characteristic points can be immediately output, and the accurate identification can be performed.
It can be seen that, the fingerprint identification method described in the embodiment of the present application, be applied to electronic equipment, this electronic equipment includes ultrasonic module and display screen, the ultrasonic module sets up in the display screen below, when the target object contacts the display screen, detect the shortest distance between target object and the preset fingerprint collection area, the target object is not in the preset fingerprint collection area, preset the partial display area of fingerprint collection area corresponding to the display screen, when the shortest distance is in the preset scope, handle preset fingerprint collection area, obtain the target fingerprint collection area, the target object is in the target fingerprint collection area, carry out fingerprint collection to the target object in the target fingerprint collection area through the ultrasonic module, obtain the target fingerprint image, can be when the finger does not press the fingerprint collection area, through certain processing method, can cover the finger with the fingerprint collection area after handling, thereby, can gather the fingerprint image, fingerprint collection efficiency has been promoted.
In accordance with the embodiment shown in fig. 1C, please refer to fig. 2, fig. 2 is a schematic flowchart of a fingerprint identification method provided in the embodiment of the present application, and as shown in the figure, the method is applied to the electronic device shown in fig. 1A, where the electronic device includes an ultrasonic module and a display screen, and the ultrasonic module is disposed below the display screen; the fingerprint identification method comprises the following steps:
201. when a target object contacts the display screen, detecting the shortest distance between the target object and a preset fingerprint acquisition area, wherein the target object is not located in the preset fingerprint acquisition area, and the preset fingerprint acquisition area corresponds to a partial display area of the display screen.
202. And when the shortest distance is within a preset range, processing the preset fingerprint acquisition area to obtain a target fingerprint acquisition area, wherein the target object is in the target fingerprint acquisition area.
203. And acquiring a fingerprint of the target object in the target fingerprint acquisition area through the ultrasonic module to obtain a target fingerprint image.
204. And acquiring a target fingerprint identification corresponding to the target fingerprint image, wherein the target fingerprint identification is used for identifying which finger the target fingerprint image specifically comes from.
205. And acquiring a preset fingerprint template corresponding to the target fingerprint identification.
206. And matching the target fingerprint image with the preset fingerprint template.
207. And when the target fingerprint image is successfully matched with the preset fingerprint template, executing target operation corresponding to the target fingerprint identification.
For the detailed description of the steps 201 to 207, reference may be made to the corresponding steps of the fingerprint identification method described in the foregoing fig. 1C, and details are not repeated here.
It can be seen that the fingerprint identification method described in the embodiment of the present application, the method is applied to an electronic device, the electronic device includes an ultrasonic module and a display screen, the ultrasonic module is disposed below the display screen, and not only can a finger not be pressed to a fingerprint collection area, but also a processed fingerprint collection area can be covered by the finger through a certain processing mode, thereby collecting a fingerprint image, improving fingerprint collection efficiency, and further obtaining a target fingerprint identifier corresponding to the target fingerprint image, selecting a preset fingerprint template corresponding to the target fingerprint identifier, and further matching the target fingerprint image with the preset fingerprint template.
Referring to fig. 3 in keeping with the above embodiments, fig. 3 is a schematic structural diagram of an electronic device according to an embodiment of the present disclosure, where as shown in the figure, the electronic device includes a processor, a memory, a communication interface, and one or more programs, the electronic device includes an ultrasonic module and a display screen, the ultrasonic module is disposed below the display screen, and the one or more programs are stored in the memory and configured to be executed by the processor, and in an embodiment of the present disclosure, the program includes instructions for performing the following steps:
when a target object contacts the display screen, detecting the shortest distance between the target object and a preset fingerprint acquisition area, wherein the target object is not located in the preset fingerprint acquisition area, and the preset fingerprint acquisition area corresponds to a partial display area of the display screen;
when the shortest distance is in a preset range, processing the preset fingerprint acquisition area to obtain a target fingerprint acquisition area, wherein the target object is in the target fingerprint acquisition area;
and acquiring a fingerprint of the target object in the target fingerprint acquisition area through the ultrasonic module to obtain a target fingerprint image.
It can be seen that, the electronic equipment described in the embodiment of the application, this electronic equipment includes ultrasonic wave module and display screen, the ultrasonic wave module sets up in the display screen below, when the target object contacts the display screen, detect the target object and predetermine the shortest distance between the fingerprint collection region, the target object is not in predetermine the fingerprint collection region, predetermine the partial display area that the fingerprint collection region corresponds the display screen, when the shortest distance is in predetermine the scope, handle predetermine the fingerprint collection region, obtain the target fingerprint collection region, the target object is in the target fingerprint collection region, carry out fingerprint collection at the target fingerprint collection region through the ultrasonic wave module to the target object, obtain the target fingerprint image, can be when the fingerprint collection region is not pressed to the finger, through certain processing method, can cover the finger with the fingerprint collection region after handling, thereby, can gather the fingerprint image, fingerprint collection efficiency has been promoted.
In one possible example, in said processing said preset fingerprint acquisition area to obtain a target fingerprint acquisition area, said program comprises instructions for performing the following steps:
determining a touch area corresponding to the target object;
determining a center point of the touch area;
determining a shortest line segment between the target object and the preset fingerprint acquisition area, wherein the shortest line segment comprises a first endpoint and a second endpoint, the first endpoint belongs to the touch area, and the second endpoint belongs to the preset fingerprint acquisition area;
determining a target vector for the second endpoint to point to the center point;
and carrying out translation processing on the preset fingerprint acquisition area according to the target vector to obtain the target fingerprint acquisition area.
In one possible example, in said processing the preset fingerprint acquisition area to obtain the target fingerprint acquisition area, the program includes instructions for performing the following steps:
determining a touch area corresponding to the target object;
determining a center point of the touch area;
determining the shortest distance between the central point and the preset fingerprint acquisition area;
and amplifying the preset fingerprint acquisition area based on the shortest distance to obtain the target fingerprint acquisition area.
In one possible example, the program further includes instructions for performing the steps of:
and when the shortest distance exceeds the upper limit value of the preset range, highlighting the preset fingerprint acquisition area to prompt the fingerprint input of the preset fingerprint acquisition area.
In one possible example, the program further includes instructions for performing the steps of:
acquiring a target fingerprint identification corresponding to the target fingerprint image, wherein the target fingerprint identification is used for identifying which finger the target fingerprint image specifically comes from;
acquiring a preset fingerprint template corresponding to the target fingerprint identification;
matching the target fingerprint image with the preset fingerprint template;
and when the target fingerprint image is successfully matched with the preset fingerprint template, executing target operation corresponding to the target fingerprint identification.
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 in 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 may be implemented in the form of hardware, or may also be implemented in the 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. 4A is a block diagram of functional units of a fingerprint identification device 400 according to an embodiment of the present application. The fingerprint identification device 400 is applied to electronic equipment, wherein the electronic equipment comprises an ultrasonic module and a display screen, and the ultrasonic module is arranged below the display screen; the device comprises: a detection unit 401, a processing unit 402, and an acquisition unit 403, wherein,
the detection unit 401 is configured to detect a shortest distance between a target object and a preset fingerprint acquisition area when the target object contacts the display screen, where the target object is not located in the preset fingerprint acquisition area, and the preset fingerprint acquisition area corresponds to a partial display area of the display screen;
the processing unit 402 is configured to process the preset fingerprint acquisition area when the shortest distance is within a preset range, so as to obtain a target fingerprint acquisition area, where the target object is located in the target fingerprint acquisition area;
the acquisition unit 403 is configured to acquire a fingerprint of the target object through the ultrasonic module in the target fingerprint acquisition area, so as to obtain a target fingerprint image.
It can be seen that, the fingerprint identification device described in the embodiment of the application, be applied to electronic equipment, this electronic equipment includes ultrasonic wave module and display screen, the ultrasonic wave module sets up in the display screen below, when target object contacts the display screen, detect target object and predetermine the shortest distance between the fingerprint collection region, target object is not in predetermine the fingerprint collection region, predetermine the partial display area of fingerprint collection region corresponding display screen, when the shortest distance is in predetermine the scope, handle predetermine the fingerprint collection region, obtain the target fingerprint collection region, target object is in the target fingerprint collection region, carry out fingerprint collection at the target fingerprint collection region to target object through the ultrasonic wave module, obtain the target fingerprint image, can be when the finger does not press the fingerprint collection region, through certain processing method, can cover the finger with the fingerprint collection region after handling, thereby, can gather the fingerprint image, fingerprint collection efficiency has been promoted.
In a possible example, in the aspect of processing the preset fingerprint acquisition area to obtain the target fingerprint acquisition area, the processing unit 402 is specifically configured to:
determining a touch area corresponding to the target object;
determining a center point of the touch area;
determining a shortest line segment between the target object and the preset fingerprint acquisition area, wherein the shortest line segment comprises a first endpoint and a second endpoint, the first endpoint belongs to the touch area, and the second endpoint belongs to the preset fingerprint acquisition area;
determining a target vector for the second endpoint to point to the center point;
and carrying out translation processing on the preset fingerprint acquisition area according to the target vector to obtain the target fingerprint acquisition area.
In a possible example, in the aspect of processing the preset fingerprint acquisition area to obtain the target fingerprint acquisition area, the processing unit 402 is specifically configured to:
determining a touch area corresponding to the target object;
determining a center point of the touch area;
determining the shortest distance between the central point and the preset fingerprint acquisition area;
and amplifying the preset fingerprint acquisition area based on the shortest distance to obtain the target fingerprint acquisition area.
In one possible example, as shown in fig. 4B, fig. 4B is a further modified structure of the fingerprint identification device shown in fig. 4A, which may further include, compared with fig. 4A: the highlighting unit 404 is specifically as follows:
the highlighting unit 404 is configured to highlight the preset fingerprint acquisition area when the shortest distance exceeds the upper limit value of the preset range, so as to prompt a user to perform fingerprint input on the preset fingerprint acquisition area.
In one possible example, as shown in fig. 4C, fig. 4C is a further modified structure of the fingerprint identification device shown in fig. 4A, which may further include, compared with fig. 4A: the obtaining unit 405, the matching unit 406, and the executing unit 407 are specifically as follows:
the acquiring unit 405 is configured to acquire a target fingerprint identifier corresponding to the target fingerprint image, where the target fingerprint identifier is used to identify which finger the target fingerprint image specifically comes from; acquiring a preset fingerprint template corresponding to the target fingerprint identification;
the matching unit 406 is configured to match the target fingerprint image with the preset fingerprint template;
the executing unit 407 is configured to execute a target operation corresponding to the target fingerprint identifier when the target fingerprint image is successfully matched with the preset fingerprint template.
It can be understood that the functions of each program module of the fingerprint identification device in this embodiment may be specifically implemented according to the method in the foregoing method embodiment, and the specific implementation process may refer to the relevant description of the foregoing method embodiment, which is not described herein again.
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 embodiments of the method are described as a series of acts, but those skilled in the art should understand that the present application is not limited by the described order of acts, as some steps may be performed in other orders or simultaneously according to the present 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 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 may be implemented in the form of hardware, or may also be implemented in the 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 solutions of the present application, which are essential or part of the technical solutions contributing to the prior art, or all or part of the technical solutions, may be embodied in the form of a software product, which is stored in a memory and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the above methods 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 of the methods of the above embodiments may be implemented by a program, which is stored in a computer-readable memory, the memory including: 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 (8)
1. An electronic device, comprising a processing circuit, and an ultrasonic module and a display screen connected to the processing circuit, wherein the ultrasonic module is disposed below the display screen,
the display screen is used for detecting the shortest distance between a target object and a preset fingerprint acquisition area when the target object contacts the display screen, wherein the target object is not located in the preset fingerprint acquisition area, and the preset fingerprint acquisition area corresponds to a part of display area of the display screen;
the processing circuit is used for processing the preset fingerprint acquisition area when the shortest distance is within a preset range to obtain a target fingerprint acquisition area, and the target object is located in the target fingerprint acquisition area;
the ultrasonic module is used for carrying out fingerprint acquisition on the target object in the target fingerprint acquisition area to obtain a target fingerprint image;
wherein, in the aspect of processing the preset fingerprint acquisition area to obtain a target fingerprint acquisition area, the processing circuit is specifically configured to:
determining a touch area corresponding to the target object;
determining a center point of the touch area;
determining a shortest line segment between the target object and the preset fingerprint acquisition area, wherein the shortest line segment comprises a first endpoint and a second endpoint, the first endpoint belongs to the touch area, and the second endpoint belongs to the preset fingerprint acquisition area;
determining a target vector for the second endpoint to point to the center point;
carrying out translation processing on the preset fingerprint acquisition area according to the target vector to obtain the target fingerprint acquisition area;
or,
wherein, in the aspect of processing the preset fingerprint acquisition area to obtain a target fingerprint acquisition area, the processing circuit is specifically configured to:
determining a touch area corresponding to the target object;
determining a center point of the touch area;
determining the shortest distance between the central point and the preset fingerprint acquisition area;
and amplifying the preset fingerprint acquisition area based on the shortest distance to obtain the target fingerprint acquisition area.
2. The electronic device of claim 1, wherein the display screen is further specifically configured to:
and when the shortest distance exceeds the upper limit value of the preset range, highlighting the preset fingerprint acquisition area to prompt the fingerprint input of the preset fingerprint acquisition area.
3. The electronic device of claim 1 or 2, wherein the processing circuit is further specifically configured to:
acquiring a target fingerprint identification corresponding to the target fingerprint image, wherein the target fingerprint identification is used for identifying which finger the target fingerprint image specifically comes from;
acquiring a preset fingerprint template corresponding to the target fingerprint identification;
matching the target fingerprint image with the preset fingerprint template;
and when the target fingerprint image is successfully matched with the preset fingerprint template, executing target operation corresponding to the target fingerprint identification.
4. The fingerprint identification method is characterized by being applied to electronic equipment, wherein the electronic equipment comprises an ultrasonic module and a display screen, and the ultrasonic module is arranged below the display screen; the method comprises the following steps:
when a target object contacts the display screen, detecting the shortest distance between the target object and a preset fingerprint acquisition area, wherein the target object is not located in the preset fingerprint acquisition area, and the preset fingerprint acquisition area corresponds to a partial display area of the display screen;
when the shortest distance is in a preset range, processing the preset fingerprint acquisition area to obtain a target fingerprint acquisition area, wherein the target object is in the target fingerprint acquisition area;
performing fingerprint acquisition on the target object in the target fingerprint acquisition area through the ultrasonic module to obtain a target fingerprint image;
wherein, the processing the preset fingerprint acquisition area to obtain a target fingerprint acquisition area comprises:
determining a touch area corresponding to the target object;
determining a center point of the touch area;
determining a shortest line segment between the target object and the preset fingerprint acquisition area, wherein the shortest line segment comprises a first end point and a second end point, the first end point belongs to the touch area, and the second end point belongs to the preset fingerprint acquisition area;
determining a target vector of the second endpoint pointing to the center point;
carrying out translation processing on the preset fingerprint acquisition area according to the target vector to obtain the target fingerprint acquisition area;
or,
wherein, the processing the preset fingerprint acquisition area to obtain a target fingerprint acquisition area comprises:
determining a touch area corresponding to the target object;
determining a center point of the touch area;
determining the shortest distance between the central point and the preset fingerprint acquisition area;
and amplifying the preset fingerprint acquisition area based on the shortest distance to obtain the target fingerprint acquisition area.
5. The method of claim 4, further comprising:
and when the shortest distance exceeds the upper limit value of the preset range, highlighting the preset fingerprint acquisition area to prompt the fingerprint input of the preset fingerprint acquisition area.
6. The method according to claim 4 or 5, characterized in that the method further comprises:
acquiring a target fingerprint identification corresponding to the target fingerprint image, wherein the target fingerprint identification is used for identifying which finger the target fingerprint image specifically comes from;
acquiring a preset fingerprint template corresponding to the target fingerprint identification;
matching the target fingerprint image with the preset fingerprint template;
and when the target fingerprint image is successfully matched with the preset fingerprint template, executing target operation corresponding to the target fingerprint identification.
7. The fingerprint identification device is characterized by being applied to electronic equipment, wherein the electronic equipment comprises an ultrasonic module and a display screen, and the ultrasonic module is arranged below the display screen; the device comprises: a detection unit, a processing unit and an acquisition unit, wherein,
the detection unit is used for detecting the shortest distance between a target object and a preset fingerprint acquisition area when the target object contacts the display screen, wherein the target object is not located in the preset fingerprint acquisition area, and the preset fingerprint acquisition area corresponds to a part of display area of the display screen;
the processing unit is used for processing the preset fingerprint acquisition area when the shortest distance is in a preset range to obtain a target fingerprint acquisition area, and the target object is in the target fingerprint acquisition area;
the acquisition unit is used for performing fingerprint acquisition on the target object in the target fingerprint acquisition area through the ultrasonic module to obtain a target fingerprint image;
wherein, the processing the preset fingerprint acquisition area to obtain a target fingerprint acquisition area comprises:
determining a touch area corresponding to the target object;
determining a center point of the touch area;
determining a shortest line segment between the target object and the preset fingerprint acquisition area, wherein the shortest line segment comprises a first endpoint and a second endpoint, the first endpoint belongs to the touch area, and the second endpoint belongs to the preset fingerprint acquisition area;
determining a target vector for the second endpoint to point to the center point;
carrying out translation processing on the preset fingerprint acquisition area according to the target vector to obtain the target fingerprint acquisition area;
or,
wherein, to predetermine fingerprint collection area and handle, obtain the target fingerprint collection area, include:
determining a touch area corresponding to the target object;
determining a center point of the touch area;
determining the shortest distance between the central point and the preset fingerprint acquisition area;
and amplifying the preset fingerprint acquisition area based on the shortest distance to obtain the target fingerprint acquisition area.
8. 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 of the claims 4-6.
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