CN110390296B - Fingerprint identification method and related product - Google Patents

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

Fingerprint identification method and related products

technical field

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

Background technique

With the popularization and application of electronic devices (such as mobile phones, tablet computers, etc.), electronic devices can support more and more applications, and their functions are becoming more and more powerful. Indispensable electronic supplies.

Fingerprint identification technology has also become a standard technology for electronic equipment. With the development of fingerprint identification technology, regional fingerprint identification technology is becoming more and more popular at present. However, sometimes users cannot collect fingerprints before entering the fingerprint identification area. to the fingerprint image, which reduces the efficiency of fingerprint collection.

Contents of the invention

Embodiments of the present application provide a fingerprint identification method and related products, which help to improve the efficiency of fingerprint collection.

In the first aspect, the embodiment of the present application provides an electronic device, the electronic device includes a processing circuit, and an ultrasonic module and a display screen connected to the processing circuit, the ultrasonic module is arranged under the display screen, in,

The display screen is used to detect the shortest distance between the target object and the preset fingerprint collection area when the target object touches the display screen, and the target object is not in the preset fingerprint collection area, so The preset fingerprint collection area corresponds to a part of the display area of the display screen;

The processing circuit is configured to process the preset fingerprint collection area to obtain a target fingerprint collection area when the shortest distance is within a preset range, and the target object is located in the target fingerprint collection area;

The ultrasonic module is used to collect the fingerprint of the target object in the target fingerprint collection area to obtain a target fingerprint image.

In the second aspect, the embodiment of the present application provides a fingerprint identification method, which is applied to electronic equipment, and the electronic equipment includes an ultrasonic module and a display screen, and the ultrasonic module is arranged under the display screen; the method includes:

When the target object touches the display screen, detect the shortest distance between the target object and the preset fingerprint collection area, the target object is not in the preset fingerprint collection area, and the preset fingerprint collection area corresponds to a portion of the display area of the display screen;

When the shortest distance is within a preset range, the preset fingerprint collection area is processed to obtain a target fingerprint collection area, and the target object is located in the target fingerprint collection area;

The ultrasonic module collects fingerprints of the target object in the target fingerprint collection area to obtain a target fingerprint image.

In the third aspect, the embodiment of the present application provides a fingerprint identification device, which is applied to electronic equipment, and the electronic equipment includes an ultrasonic module and a display screen, and the ultrasonic module is arranged under the display screen; the device includes : detection unit, processing unit and acquisition unit, wherein,

The detection unit is configured to detect the shortest distance between the target object and a preset fingerprint collection area when the target object touches the display screen, and the target object is not in the preset fingerprint collection area, so The preset fingerprint collection area corresponds to a part of the display area of the display screen;

The processing unit is configured to process the preset fingerprint collection area to obtain a target fingerprint collection area when the shortest distance is within a preset range, and the target object is in the target fingerprint collection area;

The collection unit is configured to collect the fingerprint of the target object in the target fingerprint collection 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, wherein the one or more programs are stored in the memory and are configured to be processed by the above The above program includes instructions for executing the steps in the second aspect of the embodiments of the present application.

In the fifth aspect, the embodiment of the present application provides a computer-readable storage medium, wherein the above-mentioned computer-readable storage medium stores a computer program for electronic data exchange, wherein the above-mentioned computer program enables the computer to execute Some or all of the steps described in the second aspect.

In a sixth aspect, an embodiment of the present application provides a computer program product, wherein the computer program product includes a non-transitory computer-readable storage medium storing a computer program, and the computer program is operable to enable the computer to execute the program as implemented in the present application. Example of some or all of the steps described in the second aspect. The computer program product may be a software installation package.

Implementing the embodiment of the present application has the following beneficial effects:

It can be seen that the fingerprint identification method and related products described in the embodiments of the present application are applied to electronic equipment. The electronic equipment includes an ultrasonic module and a display screen. The ultrasonic module is arranged under the display screen. screen, detect the shortest distance between the target object and the preset fingerprint collection area, the target object is not in the preset fingerprint collection area, and the preset fingerprint collection area corresponds to a part of the display area of the display screen. The preset fingerprint collection area is processed to obtain the target fingerprint collection area. The target object is located in the target fingerprint collection area. The ultrasonic module is used to collect the fingerprint of the target object in the target fingerprint collection area to obtain the target fingerprint image, which can be detected when the finger is not pressed. In the fingerprint collection area, through a certain processing method, the processed fingerprint collection area can cover the finger, so that the fingerprint image can be collected, and the fingerprint collection efficiency is improved.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present application. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

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

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

Fig. 1C is a schematic flow chart of a fingerprint identification method provided by an embodiment of the present application;

FIG. 1D is a schematic illustration of a fingerprint collection area provided by an embodiment of the present application;

Fig. 2 is a schematic flow chart of another fingerprint identification method provided by the embodiment of the present application;

FIG. 3 is a schematic structural diagram of an electronic device provided in an embodiment of the present application;

FIG. 4A is a block diagram of functional units of a fingerprint identification device provided by an embodiment of the present application;

Fig. 4B is a block diagram of functional units of another fingerprint identification device provided by the embodiment of the present application;

FIG. 4C is a block diagram of functional units of another fingerprint recognition device provided by an embodiment of the present application.

Detailed ways

In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiment of the application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiment of the application. Obviously, the described embodiment is only It is a part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of this application.

The terms "first", "second" and the like in the specification and claims of the present application and the above drawings are used to distinguish different objects, rather than to describe a specific 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, product or device comprising a series of steps or units is not limited to the listed steps or units, but optionally also includes unlisted steps or units, or optionally further includes For other steps or units inherent in these processes, methods, products or devices.

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 present application. The occurrences of this 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 understood explicitly and implicitly by those skilled in the art that the embodiments described herein can be combined with other embodiments.

The electronic devices involved in the embodiments of the present application may include various handheld devices with wireless communication functions, vehicle-mounted devices, wearable devices (smart watches, smart bracelets, wireless earphones, augmented reality/virtual reality devices, smart glasses), Computing devices or other processing devices connected to wireless modems, as well as various forms of user equipment (UE), mobile stations (mobile stations, MS), terminal devices (terminal devices), and so on. For convenience of description, the devices mentioned above are collectively referred to as electronic devices.

The following describes the embodiments of the present application in detail.

Please refer to FIG. 1A. FIG. 1A is a schematic structural diagram of an electronic device disclosed in an embodiment of the present application. The electronic device 100 includes a storage and processing circuit 110, and a sensor 170 connected to the storage and processing circuit 110, wherein:

Electronic device 100 may include control circuitry, which may include storage and processing circuitry 110 . The storage and processing circuit 110 can be memory, such as hard disk drive memory, non-volatile memory (such as flash memory or other electronically programmable read-only memory used to form a solid-state drive, etc.), volatile memory (such as static or dynamic random access memory, etc.) access memory, etc.), etc., the embodiment of the present application is not limited. Processing circuitry in storage and processing circuitry 110 may be used to control the operation of electronic device 100 . The processing circuit 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 circuit 110 can be used to run software in the electronic device 100, such as Internet browsing applications, Voice over Internet Protocol (Voice over Internet Protocol, VOIP) telephone calling applications, email applications, media playback applications, operating system functions wait. These software can be used to perform control operations such as camera based image acquisition, ambient light measurement based on ambient light sensor, proximity sensor based measurement based on proximity sensor, information based on status indicators such as status indicators such as LEDs Display functions, touch sensor based touch event detection, functions associated with displaying information on multiple (e.g. layered) display screens, operations associated with performing wireless communication functions, functions associated with collecting and generating audio signals Operations, control operations associated with collecting and processing button press event data, and other functions in the electronic device 100 are not limited by this embodiment of the present application.

The electronic device 100 may include an input-output circuit 150 . The input-output circuit 150 can be used to enable the electronic device 100 to realize data input and output, that is, allow the electronic device 100 to receive data from external devices and also allow the electronic device 100 to output data from the electronic device 100 to external devices. The input-output circuit 150 may further include a sensor 170 . The sensor 170 can include an ultrasonic module, and can also include an ambient light sensor, a proximity sensor based on light and capacitance, a touch sensor (for example, based on an optical touch sensor and/or a capacitive touch sensor, wherein the touch sensor can be a touch screen It can also be used independently as a touch sensor structure), acceleration sensor, temperature sensor and other sensors. The ultrasonic module can be integrated under the screen, which is not limited here. The ultrasonic module can be used to collect fingerprint images, A sensor can be used to detect battery temperature.

Input-output circuitry 150 may also include one or more display screens, such as display screen 130 . The display screen 130 may include one or a combination of liquid crystal display screens, organic light emitting diode display screens, electronic ink display screens, plasma display screens, and display screens using other display technologies. Display 130 may include an array of touch sensors (ie, display 130 may be a touch-sensitive display). The touch sensor may be a capacitive touch sensor formed from an array of transparent touch sensor electrodes such as indium tin oxide (ITO) electrodes, or may be a touch sensor formed using other touch technologies such as acoustic touch, pressure sensitive touch, resistive touch Touch, optical touch, etc. are not limited in this embodiment of the application.

The electronic device 100 may also include an audio component 140 . The audio component 140 may be used to provide audio input and output functions for the electronic device 100 . The audio components 140 in the electronic device 100 may include speakers, microphones, buzzers, tone generators, and other components for generating and detecting sounds.

The communication circuit 120 can be used to provide the electronic device 100 with the ability 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. 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 circuit in the communication circuit 120 may include a circuit for supporting near field communication (Near Field Communication, NFC) by transmitting and receiving near field coupled electromagnetic signals. For example, communication circuitry 120 may include a near field communication antenna and a near field communication transceiver. Communications circuitry 120 may also include cellular telephone transceiver circuitry and antennas, wireless local area network transceiver circuitry and antennas, and the like.

The electronic device 100 may further include a battery, a power management circuit 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 can input commands through the input-output circuit 150 to control the operation of the electronic device 100 , and can use the output data of the input-output circuit 150 to receive status information and other outputs from the electronic device 100 .

In a possible example, take the ultrasonic module located below the screen as an example, as shown in FIG. 1B, which is a schematic structural diagram of an electronic device. The electronic device 100 may include a cover glass (Cover glass) 210, a display screen (OLED) 220, adhesion layer (Adhesive) 230, substrate (TFT Glass) 240, pixel layer (Pixel) 250, piezoelectric material layer (Copolymer) 260, Ag Ink layer 270, gel layer (DAF) 280. Certainly, a film layer (film) may also be included above the glass cover plate, and the film layer may be a tempered film, which is used to protect the display screen of the electronic device.

Further, the ultrasonic module can include: TFT Glass layer, Pixel layer, Ag Ink layer and gel layer. The TFT Glass layer is used for metal wiring and material coating; the Pixel layer is used for the Metal electrode embedded on the TFT Glass, as the negative electrode for ultrasonic transmission/reception, Copolymer, also called piezoelectric transducer material, which can "material deformation-voltage "Mutual conversion; the Ag Ink layer is used as the positive electrode for ultrasonic transmission/reception; DAF is the coagulant used to protect the ultrasonic module; the Adhesive layer is the glue that puts the ultrasonic module on the bottom of the OLED screen.

In specific implementation, the ultrasonic module can include two states, TX state (for transmitting ultrasonic waves) and RX state (for receiving ultrasonic waves).

In the TX state, a high-frequency (usually 10MHz level) oscillating signal, such as a sine wave, is provided through the electrodes (Pixel negative electrode and Ag Ink positive electrode) at both ends of the Copolymer (piezoelectric material), and the Copolymer will generate a response frequency vibration and emit Ultrasonic waves, the upwardly transmitted ultrasonic waves pass through the OLED screen and reach the fingerprints that are in contact with the screen surface. When the fingerprint valley ridges are attached to the screen, the acoustic resistance characteristics of the air in the fingerprint valleys are quite different from the acoustic resistance characteristics of the glass on the screen surface. , the acoustic resistance characteristics of the skin tissue of the fingerprint ridges are relatively different from the acoustic resistance characteristics of the screen surface glass, therefore, the reflected signal strengths of the fingerprint valleys and ridges to ultrasonic waves are different.

In the RX state, when the reflected ultrasonic wave passes through the display screen again and reaches the ultrasonic module (Pixel-Copolymer-Ag Ink), it causes the Copolymer to vibrate to generate an electrical signal, and the Copolymer vibration intensity of the pixel area corresponding to the fingerprint ridges at different positions is large Different, so the potential difference received by Pixel at different positions is also different (AgInk is equipotential), and the potential difference is converted into a two-dimensional image signal, thereby obtaining an ultrasonic fingerprint image.

Based on the electronic devices described above in FIG. 1A and FIG. 1B , it can be used to realize the following functions:

The display screen is used to detect the shortest distance between the target object and the preset fingerprint collection area when the target object touches the display screen, and the target object is not in the preset fingerprint collection area, so The preset fingerprint collection area corresponds to a part of the display area of the display screen;

The processing circuit is configured to process the preset fingerprint collection area to obtain a target fingerprint collection area when the shortest distance is within a preset range, and the target object is located in the target fingerprint collection area;

The ultrasonic module is used to collect the fingerprint of the target object in the target fingerprint collection area to obtain a target fingerprint image.

In a possible example, in terms of processing the preset fingerprint collection area to obtain a target fingerprint collection area, the processing circuit is specifically used for:

determining the touch area corresponding to the target object;

determining the center point of the touch area;

determining the shortest line segment between the target object and the preset fingerprint collection area, the shortest line segment including a first end point and the second end point, the first end point belongs to the touch area, and the second end point The two endpoints belong to the preset fingerprint collection area;

determining a target vector pointing from the second end point to the center point;

Perform translation processing on the preset fingerprint collection area according to the target vector to obtain the target fingerprint collection area.

In a possible example, in terms of processing the preset fingerprint collection area to obtain a target fingerprint collection area, the processing circuit is specifically used for:

determining the touch area corresponding to the target object;

determining the center point of the touch area;

determining the shortest distance between the central point and the preset fingerprint collection area;

Enlarging the preset fingerprint collection area based on the shortest distance to obtain the target fingerprint collection area.

In one possible example, the display screen is also specifically used for:

When the shortest distance exceeds the upper limit of the preset range, the preset fingerprint collection area is highlighted to prompt fingerprint input in the preset fingerprint collection area.

In a possible example, the processing circuit is further specifically configured to:

Acquiring 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;

matching the target fingerprint image 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 is executed.

It can be seen that the electronic device described in the embodiment of the present application includes an ultrasonic module and a display screen. The ultrasonic module is arranged under the display screen. When the target object touches the display screen, it detects the target object and the preset The shortest distance between fingerprint collection areas, the target object is not in the preset fingerprint collection area, and the preset fingerprint collection area corresponds to a part of the display area of the display screen. When the shortest distance is within the preset range, the preset fingerprint collection area is processed. The target fingerprint collection area is obtained. The target object is in the target fingerprint collection area. The ultrasonic module is used to collect the fingerprint of the target object in the target fingerprint collection area to obtain the target fingerprint image. When the finger is not pressed to the fingerprint collection area, it can pass certain processing. In this way, the processed fingerprint collection area can cover the finger, so that the fingerprint image can be collected, and the fingerprint collection efficiency is improved.

Please refer to Figure 1C, Figure 1C is a schematic flow diagram of a fingerprint identification method provided by the embodiment of the present application, as shown in the figure, it is applied to the electronic device shown in Figure 1A, and the electronic device includes an ultrasonic module and a display screen , the ultrasonic module is arranged below the display screen; the fingerprint identification method includes:

101. When the target object touches the display screen, detect the shortest distance between the target object and the preset fingerprint collection area, the target object is not in the preset fingerprint collection area, and the preset fingerprint collection area The area corresponds to a part of the display area of the display screen.

In the embodiment of the present application, the ultrasonic module can realize the full-screen fingerprint recognition function, that is, the entire display screen can be used to realize fingerprint collection, or the regional fingerprint recognition function, that is, a part of the display screen can realize fingerprint collection. The aforementioned preset fingerprint collection area can be set by the user or defaulted by the system, and the preset fingerprint collection area corresponds to a part of the display area of the display screen.

Among them, the ultrasonic module can be integrated under the display screen, as shown in Figure 1D, the ultrasonic module corresponds to the fingerprint collection area, and the fingerprint collection area corresponds to all or part of the touch area of the display screen, and the fingerprint collection area can realize one or more finger for fingerprinting. When the finger touches or approaches the touch area of the display screen corresponding to the fingerprint collection area, the electronic device can collect the fingerprint through the ultrasonic module to obtain the target fingerprint image. The aforementioned target object may be a finger or other objects. The above-mentioned display screen can be a touch display screen. When the target object touches the display screen, the shortest distance between the target object and the preset fingerprint collection area can be detected through the touch screen display, and the target object is not in the preset fingerprint collection area. area (that is, there is no intersection between the touch area corresponding to the target object and the preset fingerprint collection area), and the preset fingerprint collection area corresponds to a part of the display area of the display screen.

102. When the shortest distance is within a preset range, process the preset fingerprint collection area to obtain a target fingerprint collection area, and the target object is in the target fingerprint collection area.

Wherein, the above processing may be at least one of the following: translation, rotation, enlargement, deformation, etc., which is not limited herein. The above modification can be understood as changing the shape of the preset fingerprint collection area. For example, the original preset fingerprint collection area is a rectangle, and the modified preset fingerprint collection area can be a circle. The aforementioned preset range may be set by the user or defaulted by the system. In a specific implementation, when the shortest distance is within the preset range, the electronic device can process the preset fingerprint collection area, for example, zoom in or translate to obtain the target fingerprint collection area, and the touch area corresponding to the target object can be partially or All are in the target fingerprint collection area.

In a possible example, the above step 102, processing the preset fingerprint collection area to obtain the target fingerprint collection area may include the following steps:

A21. Determine the touch area corresponding to the target object;

A22. Determine the center point of the touch area;

A23. Determine the shortest line segment between the target object and the preset fingerprint collection area, the shortest line segment includes a first end point and the second end point, the first end point belongs to the touch area, so The second endpoint belongs to the preset fingerprint collection area;

A24. Determine the target vector of the second end point pointing to the center point;

A25. Perform translation processing on the preset fingerprint collection area according to the target vector to obtain the target fingerprint collection area.

Wherein, when the target object touches the display screen, the electronic device can determine the touch area of the target object, the center point of the touch area can be determined geometrically, and the shortest line segment between the target object and the preset fingerprint collection area can be determined. The 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 collection area. Further, it can be determined that the second endpoint points to the center The target vector of the point, since the vector includes size and direction, the preset fingerprint collection area can be translated according to the target vector to obtain the target fingerprint collection area.

In a possible example, the above step 102, processing the preset fingerprint collection area to obtain the target fingerprint collection area may include the following steps:

B21. Determine the touch area corresponding to the target object;

B22. Determine the center point of the touch area;

B23. Determine the shortest distance between the central point and the preset fingerprint collection area;

B24. Enlarge the preset fingerprint collection area based on the shortest distance to obtain the target fingerprint collection area.

In a specific implementation, when the target object touches the display screen, the electronic device can determine the touch area of the target object, the center point of the touch area can be determined geometrically, and the electronic device can also determine the distance between the center point and the preset fingerprint collection area. The shortest distance, and further, the preset fingerprint collection area can be enlarged based on the shortest distance to obtain the target fingerprint collection area, for example, the edge of the preset fingerprint collection area can be extended outward based on the shortest distance, or, the preset fingerprint can be determined The center point of the collection area determines the longest axis of the preset fingerprint collection area. The longest axis refers to the longest distance from the center point to the boundary of the preset fingerprint collection area. The sum of the longest axis and the shortest distance is used as the radius, and A circle is formed with the radius, and the area covered by the circle is used as the target fingerprint collection area.

103. Collect fingerprints of the target object in the target fingerprint collection area by the ultrasonic module to obtain a target fingerprint image.

Wherein, since the target object is in the target fingerprint collection area, the fingerprint image can be collected. Specifically, the electronic device can obtain the target fingerprint image in the target fingerprint collection area through the ultrasonic module, and the target fingerprint image can be used as a fingerprint template , or, subsequently used to implement fingerprint unlocking.

In a possible example, the above step 103, using the ultrasonic module to collect the fingerprint of the target object in the target fingerprint collection area to obtain the target fingerprint image, may include the following steps:

31. Acquiring target touch parameters for the display screen;

32. According to the mapping relationship between the preset touch parameters and the working parameters of the ultrasonic fingerprint identification module, determine the target working parameters corresponding to the target touch parameters;

33. Control the ultrasonic fingerprint recognition module to collect fingerprints according to the target working parameters, and obtain the target fingerprint image.

Wherein, the above-mentioned touch parameters can be at least one of the following: touch strength of the touch screen, touch time of the touch screen, touch area of the touch screen, number of touch points of the touch screen, etc., here Not limited. The working parameters of the ultrasonic fingerprint recognition module can be at least one of the following: the transmission power of the ultrasonic fingerprint recognition module, the working frequency of the ultrasonic fingerprint recognition module, the working current of the ultrasonic fingerprint recognition module, and the working voltage of the ultrasonic fingerprint recognition module and the working power of the ultrasonic fingerprint identification module, etc., are not limited here.

In a specific implementation, the mapping relationship between the preset touch parameters and the working parameters of the ultrasonic fingerprint identification module can be stored in the electronic device in advance, and the electronic device can obtain the target touch parameters for the display screen, and determine according to the mapping relationship A target operating parameter corresponding to the target touch parameter, and fingerprint collection is performed according to the target operating parameter to obtain a target fingerprint image. Since the working parameters of the ultrasonic fingerprint recognition module are closely related to the touch parameters, the working parameters corresponding to the touch operation can be obtained for fingerprint collection, and a fingerprint image with better image quality can be obtained. For example, if the touch force is too light, it may If the fingerprint details are not clear, the fingerprint image quality can be improved to a certain extent by increasing the transmission power of the ultrasonic fingerprint recognition module.

In a possible example, the following steps may also be included:

When the shortest distance exceeds the upper limit of the preset range, the preset fingerprint collection area is highlighted to prompt fingerprint input in the preset fingerprint collection area.

Among them, the above-mentioned highlighting method can be highlighted display, or special effect display, or the default fingerprint collection area is in a black screen state, and other areas are in a bright screen state, etc., which are not limited here. In the specific implementation, the shortest distance When the upper limit of the preset range is exceeded, the preset fingerprint collection area may be highlighted to prompt fingerprint input in the preset fingerprint collection area.

In a possible example, after the above step 103, the following steps may also be included:

C1. Obtain the target fingerprint identification corresponding to the target fingerprint image, the target fingerprint identification is used to identify which finger the target fingerprint image specifically comes from;

C2. Obtain a preset fingerprint template corresponding to the target fingerprint identifier;

C3. Matching the target fingerprint image with the preset fingerprint template;

C4. When the target fingerprint image is successfully matched with the preset fingerprint template, perform a target operation corresponding to the target fingerprint identifier.

Among them, it can be seen from the above that the ultrasonic module can not only collect fingerprints, but also collect the outline of the user's hand. Through the outline of the finger, it can be determined which finger the finger is, for example, the thumb of the left hand, and the thumb of the right hand. Electronic devices can also The mapping relationship between the fingerprint identification and the operation is pre-stored, and different fingerprint identifications correspond to different operations. The above-mentioned target operation can be at least one of the following: start application operation, close application operation, payment operation, delete operation, photographing operation, storage operation , enlargement operation, copy operation, cut operation, unlock operation, encryption operation, etc., are not limited here. In a specific implementation, the electronic device can obtain a target fingerprint ID corresponding to the target fingerprint image, and the target fingerprint ID is used to identify which finger the target fingerprint image comes from. The electronic device can pre-store a fingerprint template set, and the fingerprint template set includes multiple fingerprints. Templates, each fingerprint template corresponds to a fingerprint identification, and then, the preset fingerprint template corresponding to the target fingerprint identification can be selected, and further, the target fingerprint image can be matched with the preset fingerprint template, and the target fingerprint image and the preset fingerprint template can be matched. When the template matching is successful, the target operation corresponding to the target fingerprint identification can be executed; otherwise, the user is prompted that the fingerprint identification fails.

In a possible example, the step C3 above, matching the target fingerprint image with the preset fingerprint template, may include the following steps:

C31. Perform image segmentation on the target fingerprint image to obtain a target fingerprint region image;

C32. Analyzing the feature point distribution of the target fingerprint area image;

C33. Perform circular image interception on the target fingerprint area image according to M different centers to obtain M circular fingerprint area images, where M is an integer greater than 3;

C34. Select a target circular fingerprint area image from the M circular fingerprint area images, the number of feature points contained in the target circular fingerprint area image is greater than that of the other M circular fingerprint area images Circular fingerprint area image;

C35. Divide the target circular fingerprint region image to obtain N rings, and the ring widths of the N rings are the same;

C36. Starting from the ring with the smallest radius among the N rings, perform feature point matching on the N rings with the preset fingerprint template in turn, and accumulate the matching values of the matched rings;

C37. Immediately stop performing feature point matching when the accumulated matching value is greater than the target fingerprint recognition threshold, and output a prompt message that the fingerprint recognition is successful.

Among them, the electronic device can perform image segmentation on the target fingerprint image to obtain the target fingerprint area image, and then analyze the feature point distribution of the target fingerprint area image, and conduct circular image interception on the target fingerprint area image according to M different circle centers to obtain M circular fingerprint area images, M is an integer greater than 3, select the target circular fingerprint area image from the M circular fingerprint area images, the number of feature points contained in the target circular fingerprint area image is greater than M circles other circular fingerprint area images in the shaped fingerprint area image, divide the target circular fingerprint area image into N rings, and the ring widths of the N rings are the same, starting from the ring with the smallest radius among the N rings, divide The feature points of the N rings are matched with the preset fingerprint template in turn, and the matching value of the matched rings is accumulated. In this way, in the process of fingerprint identification, the feature points of different positions or different fingerprints can be used for matching, which is equivalent to The entire fingerprint image is sampled, and the sampling can cover the entire fingerprint area, so that the corresponding representative features can be found from each area for matching, and when the accumulated matching value is greater than the target fingerprint recognition threshold, stop immediately. Points are matched, and a prompt message of successful fingerprint recognition is output. In this way, fingerprint recognition can be quickly and accurately identified.

It can be seen that the fingerprint recognition method described in the embodiment of the present application is applied to electronic equipment, and the electronic equipment includes an ultrasonic module and a display screen. The ultrasonic module is arranged under the display screen. When the target object touches the display screen, Detect the shortest distance between the target object and the preset fingerprint collection area. The target object is not in the preset fingerprint collection area. The preset fingerprint collection area corresponds to part of the display area of the display screen. When the shortest distance is within the preset range, the preset The fingerprint collection area is processed to obtain the target fingerprint collection area. The target object is in the target fingerprint collection area. The ultrasonic module is used to collect the fingerprint of the target object in the target fingerprint collection area to obtain the target fingerprint image. At this time, through a certain processing method, the processed fingerprint collection area can cover the finger, thereby, the fingerprint image can be collected, and the fingerprint collection efficiency is improved.

Consistent with the above embodiment shown in FIG. 1C, please refer to FIG. 2. FIG. 2 is a schematic flowchart of a fingerprint identification method provided by the embodiment of the present application, as shown in the figure, applied to the electronic device shown in FIG. 1A , the electronic device includes an ultrasonic module and a display screen, and the ultrasonic module is arranged below the display screen; the fingerprint identification method includes:

201. When the target object touches the display screen, detect the shortest distance between the target object and the preset fingerprint collection area, the target object is not in the preset fingerprint collection area, and the preset fingerprint collection area The area corresponds to a part of the display area of the display screen.

202. When the shortest distance is within a preset range, process the preset fingerprint collection area to obtain a target fingerprint collection area, and the target object is in the target fingerprint collection area.

203. Use the ultrasonic module to collect fingerprints on the target object in the target fingerprint collection area to obtain a target fingerprint image.

204. 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 is from.

205. Acquire a preset fingerprint template corresponding to the target fingerprint identifier.

206. Match the target fingerprint image with the preset fingerprint template.

207. When the target fingerprint image is successfully matched with the preset fingerprint template, perform a target operation corresponding to the target fingerprint identifier.

Wherein, for the specific description of the above steps 201 to 207, reference may be made to the corresponding steps of the fingerprint identification method described above in FIG. 1C , which will not be repeated here.

It can be seen that the fingerprint identification method described in the embodiment of the present application is applied to electronic equipment, and the electronic equipment includes an ultrasonic module and a display screen. area, through a certain processing method, the processed fingerprint collection area can cover the finger, thus, the fingerprint image can be collected, the fingerprint collection efficiency is improved, and the target fingerprint identification corresponding to the target fingerprint image can also be obtained, and the target fingerprint corresponding to the target fingerprint image can be selected. The preset fingerprint template corresponding to the fingerprint identification, and then match the target fingerprint image with the preset fingerprint template. When the two match successfully, perform the target operation corresponding to the target fingerprint identification. On the one hand, it helps to achieve fast unlocking. On the other hand, it is helpful to realize the personalized operation of the user, that is, setting different fingers to realize different functions, which improves the user experience.

Consistent with the above embodiment, please refer to FIG. 3, which is a schematic structural diagram of an electronic device provided by an embodiment of the present application. As shown in the figure, the electronic device includes a processor, a memory, a communication interface, and one or more program, the electronic device includes an ultrasonic module and a display screen, the ultrasonic module is arranged under the display screen, the above-mentioned one or more programs are stored in the above-mentioned memory, and are configured to be executed by the above-mentioned processor. In the embodiment of the application, the above program includes instructions for performing the following steps:

When the target object touches the display screen, detect the shortest distance between the target object and the preset fingerprint collection area, the target object is not in the preset fingerprint collection area, and the preset fingerprint collection area corresponds to a portion of the display area of the display screen;

When the shortest distance is within a preset range, the preset fingerprint collection area is processed to obtain a target fingerprint collection area, and the target object is located in the target fingerprint collection area;

The ultrasonic module collects fingerprints of the target object in the target fingerprint collection area to obtain a target fingerprint image.

It can be seen that the electronic device described in the embodiment of the present application includes an ultrasonic module and a display screen. The ultrasonic module is arranged under the display screen. When the target object touches the display screen, it detects the target object and the preset The shortest distance between fingerprint collection areas, the target object is not in the preset fingerprint collection area, and the preset fingerprint collection area corresponds to a part of the display area of the display screen. When the shortest distance is within the preset range, the preset fingerprint collection area is processed. The target fingerprint collection area is obtained. The target object is in the target fingerprint collection area. The ultrasonic module is used to collect the fingerprint of the target object in the target fingerprint collection area to obtain the target fingerprint image. When the finger is not pressed to the fingerprint collection area, it can pass certain processing. In this way, the processed fingerprint collection area can cover the finger, so that the fingerprint image can be collected, and the fingerprint collection efficiency is improved.

In a possible example, in terms of processing the preset fingerprint collection area to obtain a target fingerprint collection area, the above program includes instructions for performing the following steps:

determining the touch area corresponding to the target object;

determining the center point of the touch area;

determining the shortest line segment between the target object and the preset fingerprint collection area, the shortest line segment including a first end point and the second end point, the first end point belongs to the touch area, and the second end point The two endpoints belong to the preset fingerprint collection area;

determining a target vector pointing from the second end point to the center point;

Perform translation processing on the preset fingerprint collection area according to the target vector to obtain the target fingerprint collection area.

In a possible example, in terms of processing the preset fingerprint collection area to obtain a target fingerprint collection area, the above program includes instructions for performing the following steps:

determining the touch area corresponding to the target object;

determining the center point of the touch area;

determining the shortest distance between the central point and the preset fingerprint collection area;

Enlarging the preset fingerprint collection area based on the shortest distance to obtain the target fingerprint collection area.

In one possible example, the above program also includes instructions for:

When the shortest distance exceeds the upper limit of the preset range, the preset fingerprint collection area is highlighted to prompt fingerprint input in the preset fingerprint collection area.

In one possible example, the above program also includes instructions for:

Acquiring 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 identifier;

matching the target fingerprint image 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 is executed.

The foregoing mainly introduces the solutions of the embodiments of the present application from the perspective of executing the process on the method side. It can be understood that, in order to realize the above functions, the electronic device includes hardware structures and/or software modules corresponding to each function. Those skilled in the art should easily realize that, in combination with the units and algorithm steps of the examples described in the embodiments provided herein, the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a certain function is executed by hardware or computer software drives hardware depends on the specific application and design constraints of the technical solution. Skilled artisans may use different methods to implement the described functions for each specific application, but such implementation should not be regarded as exceeding the scope of the present application.

The embodiment of the present application may divide the electronic device into functional units according to the above 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 above-mentioned integrated units can be implemented in the form of hardware or in the form of software functional units. It should be noted that the division of units in the embodiment of the present application is schematic, and is only a logical function division, and there may be another division manner in actual implementation.

FIG. 4A is a block diagram of functional units of the fingerprint identification device 400 involved in the embodiment of the present application. The fingerprint identification device 400 is applied to electronic equipment, and the electronic equipment includes an ultrasonic module and a display screen, and the ultrasonic module is arranged below the display screen; the device includes: a detection unit 401, a processing unit 402 and an acquisition unit. Unit 403, where,

The detection unit 401 is configured to detect the shortest distance between the target object and a preset fingerprint collection area when the target object touches the display screen, and the target object is not in the preset fingerprint collection area, The preset fingerprint collection area corresponds to a part of the display area of the display screen;

The processing unit 402 is configured to process the preset fingerprint collection area when the shortest distance is within a preset range to obtain a target fingerprint collection area, and the target object is located in the target fingerprint collection area;

The collection unit 403 is configured to collect the fingerprint of the target object in the target fingerprint collection area through the ultrasonic module to obtain a target fingerprint image.

It can be seen that the fingerprint recognition device described in the embodiment of the present application is applied to electronic equipment, and the electronic equipment includes an ultrasonic module and a display screen. The ultrasonic module is arranged under the display screen. When the target object touches the display screen, Detect the shortest distance between the target object and the preset fingerprint collection area. The target object is not in the preset fingerprint collection area. The preset fingerprint collection area corresponds to part of the display area of the display screen. When the shortest distance is within the preset range, the preset The fingerprint collection area is processed to obtain the target fingerprint collection area. The target object is in the target fingerprint collection area. The ultrasonic module is used to collect the fingerprint of the target object in the target fingerprint collection area to obtain the target fingerprint image. At this time, through a certain processing method, the processed fingerprint collection area can cover the finger, thereby, the fingerprint image can be collected, and the fingerprint collection efficiency is improved.

In a possible example, in terms of processing the preset fingerprint collection area to obtain a target fingerprint collection area, the processing unit 402 is specifically configured to:

determining the touch area corresponding to the target object;

determining the center point of the touch area;

determining the shortest line segment between the target object and the preset fingerprint collection area, the shortest line segment including a first end point and the second end point, the first end point belongs to the touch area, and the second end point The two endpoints belong to the preset fingerprint collection area;

determining a target vector pointing from the second end point to the center point;

Perform translation processing on the preset fingerprint collection area according to the target vector to obtain the target fingerprint collection area.

In a possible example, in terms of processing the preset fingerprint collection area to obtain a target fingerprint collection area, the processing unit 402 is specifically configured to:

determining the touch area corresponding to the target object;

determining the center point of the touch area;

determining the shortest distance between the central point and the preset fingerprint collection area;

Enlarging the preset fingerprint collection area based on the shortest distance to obtain the target fingerprint collection area.

In a possible example, as shown in FIG. 4B, FIG. 4B is another modified structure of the fingerprint identification device shown in FIG. 4A. Compared with FIG. 4A, it may further include: a highlighting unit 404, specifically as follows:

The highlighting unit 404 is configured to highlight the preset fingerprint collection area when the shortest distance exceeds the upper limit of the preset range, so as to prompt fingerprint input in the preset fingerprint collection area.

In a possible example, as shown in FIG. 4C, FIG. 4C is another modified structure of the fingerprint identification device shown in FIG. 4A. Compared with FIG. Unit 407, as follows:

The acquiring unit 405 is configured to acquire a target fingerprint ID corresponding to the target fingerprint image, and the target fingerprint ID is used to identify which finger the target fingerprint image is from; and acquire a predetermined fingerprint corresponding to the target fingerprint ID. Set fingerprint template;

The matching unit 406 is configured to match the target fingerprint image with the preset fingerprint template;

The execution 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 can be specifically implemented according to the method in the above method embodiment, and the specific implementation process can refer to the relevant description of the above method embodiment, and will not be repeated here.

An embodiment of the present application also provides a computer storage medium, wherein the computer storage medium stores a computer program for electronic data exchange, and the computer program enables the computer to execute some or all of the steps of any method described in the above method embodiments , the above-mentioned computer includes electronic equipment.

An embodiment of the present application also provides a computer program product, the computer program product includes a non-transitory computer-readable storage medium storing a computer program, and the computer program is operable to enable the computer to execute any one of the methods described in the above method embodiments. Some or all steps of the method. The computer program product may be a software installation package, and the computer includes electronic equipment.

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

In the foregoing embodiments, the descriptions of each embodiment have their own emphases, and for parts not described in detail in a certain embodiment, reference may be made to relevant descriptions of other embodiments.

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

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

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

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

Those of ordinary skill in the art can understand that all or part of the steps in the various methods of the above-mentioned embodiments can be completed by instructing related hardware through a program, and the program can be stored in a computer-readable memory, and the memory can include: a flash disk , Read-only memory (English: Read-Only Memory, referred to as: ROM), random access device (English: Random Access Memory, referred to as: RAM), magnetic disk or optical disc, etc.

The embodiments of the present application have been introduced in detail above, and specific examples have been used in this paper to illustrate the principles and implementation methods of the present application. The descriptions of the above embodiments are only used to help understand the methods and core ideas of the present application; meanwhile, for Those skilled in the art will have changes in specific implementation methods and application scopes based on the ideas of the present application. In summary, the contents of this specification should not be construed as limiting the present application.

Claims (8)

1. An electronic device, characterized in that the electronic device includes a processing circuit, and an ultrasonic module and a display screen connected to the processing circuit, the ultrasonic module is arranged below the display screen, wherein, The display screen is used to detect the shortest distance between the target object and the preset fingerprint collection area when the target object touches the display screen, and the target object is not in the preset fingerprint collection area, so The preset fingerprint collection area corresponds to a part of the display area of the display screen; The processing circuit is configured to process the preset fingerprint collection area to obtain a target fingerprint collection area when the shortest distance is within a preset range, and the target object is located in the target fingerprint collection area; The ultrasonic module is used to collect fingerprints of the target object in the target fingerprint collection area to obtain a target fingerprint image; Wherein, in the aspect of processing the preset fingerprint collection area to obtain the target fingerprint collection area, the processing circuit is specifically used for: determining the touch area corresponding to the target object; determining the center point of the touch area; Determine the shortest line segment between the target object and the preset fingerprint collection area, the shortest line segment includes a first end point and a second end point, the first end point belongs to the touch area, and the second end point Belong to the preset fingerprint collection area; determining a target vector pointing from the second end point to the center point; performing translation processing on the preset fingerprint collection area according to the target vector to obtain the target fingerprint collection area; or, Wherein, in the aspect of processing the preset fingerprint collection area to obtain the target fingerprint collection area, the processing circuit is specifically used for: determining the touch area corresponding to the target object; determining the center point of the touch area; determining the shortest distance between the central point and the preset fingerprint collection area; Enlarging the preset fingerprint collection area based on the shortest distance to obtain the target fingerprint collection area. 2. The electronic device according to claim 1, wherein the display screen is further specifically used for: When the shortest distance exceeds the upper limit of the preset range, the preset fingerprint collection area is highlighted to prompt fingerprint input in the preset fingerprint collection area. 3. The electronic device according to claim 1 or 2, wherein the processing circuit is further specifically used for: Acquiring 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; matching the target fingerprint image 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 is executed. 4. A fingerprint identification method, characterized in that it is applied to electronic equipment, and the electronic equipment includes an ultrasonic module and a display screen, and the ultrasonic module is arranged below the display screen; the method includes: When the target object touches the display screen, detect the shortest distance between the target object and the preset fingerprint collection area, the target object is not in the preset fingerprint collection area, and the preset fingerprint collection area corresponds to a portion of the display area of the display screen; When the shortest distance is within a preset range, the preset fingerprint collection area is processed to obtain a target fingerprint collection area, and the target object is located in the target fingerprint collection area; performing fingerprint collection on the target object in the target fingerprint collection area by the ultrasonic module to obtain a target fingerprint image; Wherein, the processing of the preset fingerprint collection area to obtain the target fingerprint collection area includes: determining the touch area corresponding to the target object; determining the center point of the touch area; Determine the shortest line segment between the target object and the preset fingerprint collection area, the shortest line segment includes a first end point and a second end point, the first end point belongs to the touch area, and the second end point Belong to the preset fingerprint collection area; determining a target vector pointing from the second end point to the center point; performing translation processing on the preset fingerprint collection area according to the target vector to obtain the target fingerprint collection area; or, Wherein, the processing of the preset fingerprint collection area to obtain the target fingerprint collection area includes: determining the touch area corresponding to the target object; determining the center point of the touch area; determining the shortest distance between the central point and the preset fingerprint collection area; Enlarging the preset fingerprint collection area based on the shortest distance to obtain the target fingerprint collection area. 5. method according to claim 4, is characterized in that, described method also comprises: When the shortest distance exceeds the upper limit of the preset range, the preset fingerprint collection area is highlighted to prompt fingerprint input in the preset fingerprint collection area. 6. according to the described method of claim 4 or 5, it is characterized in that, described method also comprises: Acquiring 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; matching the target fingerprint image 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 is executed. 7. A fingerprint identification device, characterized in that it is applied to electronic equipment, and the electronic equipment includes an ultrasonic module and a display screen, and the ultrasonic module is arranged below the display screen; the device includes: a detection unit, A processing unit and an acquisition unit, wherein, The detection unit is configured to detect the shortest distance between the target object and a preset fingerprint collection area when the target object touches the display screen, and the target object is not in the preset fingerprint collection area, so The preset fingerprint collection area corresponds to a part of the display area of the display screen; The processing unit is configured to process the preset fingerprint collection area to obtain a target fingerprint collection area when the shortest distance is within a preset range, and the target object is in the target fingerprint collection area; The collection unit is used to collect the fingerprint of the target object in the target fingerprint collection area through the ultrasonic module to obtain a target fingerprint image; Wherein, the processing of the preset fingerprint collection area to obtain the target fingerprint collection area includes: determining the touch area corresponding to the target object; determining the center point of the touch area; Determine the shortest line segment between the target object and the preset fingerprint collection area, the shortest line segment includes a first end point and a second end point, the first end point belongs to the touch area, and the second end point Belong to the preset fingerprint collection area; determining a target vector pointing from the second end point to the center point; performing translation processing on the preset fingerprint collection area according to the target vector to obtain the target fingerprint collection area; or, Wherein, the processing of the preset fingerprint collection area to obtain the target fingerprint collection area includes: determining the touch area corresponding to the target object; determining the center point of the touch area; determining the shortest distance between the central point and the preset fingerprint collection area; Enlarging the preset fingerprint collection area based on the shortest distance to obtain the target fingerprint collection area. 8. A computer-readable storage medium, characterized by storing a computer program for electronic data exchange, wherein the computer program causes a computer to execute the method according to any one of claims 4-6.

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