CN108229372B - Fingerprint identification method, mobile terminal and computer readable storage medium - Google Patents
Fingerprint identification method, mobile terminal and computer readable storage medium Download PDFInfo
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- CN108229372B CN108229372B CN201711472119.9A CN201711472119A CN108229372B CN 108229372 B CN108229372 B CN 108229372B CN 201711472119 A CN201711472119 A CN 201711472119A CN 108229372 B CN108229372 B CN 108229372B
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
- G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
- G06V40/12—Fingerprints or palmprints
- G06V40/13—Sensors therefor
- G06V40/1318—Sensors therefor using electro-optical elements or layers, e.g. electroluminescent sensing
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V10/00—Arrangements for image or video recognition or understanding
- G06V10/10—Image acquisition
- G06V10/12—Details of acquisition arrangements; Constructional details thereof
- G06V10/14—Optical characteristics of the device performing the acquisition or on the illumination arrangements
- G06V10/143—Sensing or illuminating at different wavelengths
Abstract
The invention discloses a fingerprint identification method, which is applied to a mobile terminal, wherein the mobile terminal comprises an optical fingerprint identification module, and the method comprises the following steps: when the touch operation of the touch area of the mobile terminal is detected, acquiring the color temperature and the brightness of the current ambient light; respectively comparing the color temperature of the current ambient light with a preset color temperature range, and the brightness of the current ambient light with a preset brightness range to obtain a comparison result; and controlling the optical fingerprint identification module to set the color of the fingerprint scanning light according to the comparison result, and carrying out fingerprint acquisition and identification based on the set color of the fingerprint scanning light. The invention also discloses a mobile terminal and a computer readable storage medium. The invention can improve the speed of fingerprint acquisition and identification, thereby improving the user experience.
Description
Technical Field
The present invention relates to the field of mobile terminal technologies, and in particular, to a fingerprint identification method, a mobile terminal, and a computer-readable storage medium.
Background
With the progress of science and technology, mobile terminals have been provided with a fingerprint identification function for unlocking, mobile payment and the like. The optical fingerprint identification technology has the advantages of good stability and the like, is widely applied to mobile terminals, and has the following principle: the optical fingerprint identification module of the mobile terminal emits fingerprint scanning light, the fingerprint scanning light is reflected to the optical fingerprint identification module through the surface of the display screen with a fingerprint in a touch mode, and the optical fingerprint identification module receives the reflected fingerprint scanning light and converts the reflected fingerprint scanning light into a fingerprint image, so that fingerprint collection and identification are achieved. At present, the fingerprint scanning light emitted by the optical fingerprint identification module has only one color and is easily influenced by external environment light, so that the speed of fingerprint acquisition and identification is reduced, and the user experience is poor.
Disclosure of Invention
The invention mainly aims to provide a fingerprint identification method, a mobile terminal and a computer readable storage medium, and aims to solve the technical problems that the speed of fingerprint collection and identification is reduced and the user experience is poor due to the fact that the color of emitted fingerprint scanning light is single and the optical fingerprint identification module of the conventional mobile terminal is easily interfered by external environment light.
In order to achieve the above object, the present invention provides a fingerprint identification method, which is applied to a mobile terminal including an optical fingerprint identification module, and the method includes:
when the touch operation of the touch area of the mobile terminal is detected, acquiring the color temperature and the brightness of the current ambient light;
respectively comparing the color temperature of the current ambient light with a preset color temperature range, and the brightness of the current ambient light with a preset brightness range to obtain a comparison result;
and controlling the optical fingerprint identification module to set the color of the fingerprint scanning light according to the comparison result, and carrying out fingerprint acquisition and identification based on the set color of the fingerprint scanning light.
Optionally, the step of controlling the optical fingerprint identification module to set the color of the fingerprint scanning light according to the comparison result includes:
and when the color temperature of the current ambient light is within a preset color temperature range or the brightness of the current ambient light is within a preset brightness range, controlling the optical fingerprint identification module to set the color of the fingerprint scanning light to be blue.
Optionally, the step of controlling the optical fingerprint identification module to set the color of the fingerprint scanning light according to the comparison result further includes:
and when the color temperature of the current ambient light is smaller than a preset color temperature limit value, or the brightness of the current ambient light is larger than a preset brightness upper limit value, controlling the optical fingerprint identification module to set the color of the fingerprint scanning light to be gray.
Optionally, the step of controlling the optical fingerprint identification module to set the color of the fingerprint scanning light according to the comparison result further includes:
the step of controlling the optical fingerprint identification module to set the color of the fingerprint scanning light according to the comparison result further comprises:
and when the color temperature of the current ambient light is greater than a preset color temperature upper limit value, or the brightness of the current ambient light is less than a preset brightness lower limit value, controlling the optical fingerprint identification module to set the color of the fingerprint scanning light to be red.
Optionally, the step of fingerprint collection and identification based on the set fingerprint scanning light color comprises:
collecting a fingerprint image of a user during touch operation based on the touch area based on the set fingerprint scanning light color;
judging whether the fingerprint in the fingerprint image is a valid fingerprint;
and if so, determining that the fingerprint verification is passed.
Optionally, the step of determining whether the fingerprint in the fingerprint image is a valid fingerprint includes:
judging whether the fingerprint in the fingerprint image is matched with the fingerprint in a preset authorized fingerprint database;
if so, judging that the fingerprint in the fingerprint image is a valid fingerprint.
Optionally, after the step of determining whether the fingerprint in the fingerprint image is a valid fingerprint, the method further includes:
if not, sending out prompt information of fingerprint verification failure.
Optionally, when the touch operation of the touch area of the mobile terminal is detected, before the step of obtaining the color temperature and the brightness of the current ambient light, the method includes:
and establishing an authorized fingerprint database, wherein the authorized fingerprint database comprises a plurality of authorized fingerprints.
In addition, to achieve the above object, the present invention also provides a mobile terminal, including: a memory, a processor, and a fingerprinting program stored on the memory and executable on the processor, the fingerprinting program when executed by the processor implementing the steps of:
when the touch operation of the touch area of the mobile terminal is detected, acquiring the color temperature and the brightness of the current ambient light;
respectively comparing the color temperature of the current ambient light with a preset color temperature range, and the brightness of the current ambient light with a preset brightness range to obtain a comparison result;
and controlling the optical fingerprint identification module to set the color of the fingerprint scanning light according to the comparison result, and carrying out fingerprint acquisition and identification based on the set color of the fingerprint scanning light.
Further, to achieve the above object, the present invention also provides a computer-readable storage medium having a fingerprint recognition program stored thereon, the fingerprint recognition program implementing the steps of, when executed by a processor:
when the touch operation of the touch area of the mobile terminal is detected, acquiring the color temperature and the brightness of the current ambient light;
respectively comparing the color temperature of the current ambient light with a preset color temperature range, and the brightness of the current ambient light with a preset brightness range to obtain a comparison result;
and controlling the optical fingerprint identification module to set the color of the fingerprint scanning light according to the comparison result, and carrying out fingerprint acquisition and identification based on the set color of the fingerprint scanning light.
When the touch operation of the touch area of the mobile terminal is detected, the color temperature and the brightness of the current ambient light are obtained; respectively comparing the color temperature of the current ambient light with a preset color temperature range, and the brightness of the current ambient light with a preset brightness range to obtain a comparison result; and controlling the optical fingerprint identification module to set the color of the fingerprint scanning light according to the comparison result, and carrying out fingerprint acquisition and identification based on the set color of the fingerprint scanning light. Through the mode, the mobile terminal can control the optical fingerprint identification module to set the color of the fingerprint scanning light according to the color temperature and the brightness of the current ambient light, so that the color of the fingerprint scanning light is more suitable for the current ambient light, the interference of the current ambient light to the fingerprint scanning light is avoided, the fingerprint collection and identification speed can be increased, and the user experience is improved.
Drawings
Fig. 1 is a schematic diagram of a hardware structure of a mobile terminal implementing various embodiments of the present invention;
fig. 2 is a diagram of a communication network system architecture according to an embodiment of the present invention;
FIG. 3 is a flowchart illustrating a first embodiment of a fingerprint recognition method according to the present invention;
fig. 4 is a schematic diagram illustrating an optical fingerprint recognition principle of a mobile terminal according to an embodiment of the present invention;
FIG. 5 is a detailed flowchart of the first embodiment of the fingerprint identification method of the present invention
FIG. 6 is a flowchart illustrating a fingerprint identification method according to a second embodiment of the present invention.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In the following description, suffixes such as "module", "component", or "unit" used to denote elements are used only for facilitating the explanation of the present invention, and have no specific meaning in itself. Thus, "module", "component" or "unit" may be used mixedly.
The terminal may be implemented in various forms. For example, the terminal described in the present invention may include a mobile terminal such as a mobile phone, a tablet computer, a notebook computer, a palmtop computer, a Personal Digital Assistant (PDA), a Portable Media Player (PMP), a navigation device, a wearable device, a smart band, a pedometer, and the like, and a fixed terminal such as a Digital TV, a desktop computer, and the like.
The following description will be given by way of example of a mobile terminal, and it will be understood by those skilled in the art that the construction according to the embodiment of the present invention can be applied to a fixed type terminal, in addition to elements particularly used for mobile purposes.
Referring to fig. 1, which is a schematic diagram of a hardware structure of a mobile terminal for implementing various embodiments of the present invention, the mobile terminal 100 may include: RF (Radio Frequency) unit 101, Wi-Fi module 102, audio output unit 103, a/V (audio/video) input unit 104, sensor 105, display unit 106, user input unit 107, interface unit 108, memory 109, processor 110, and power supply 111. Those skilled in the art will appreciate that the mobile terminal architecture shown in fig. 1 is not intended to be limiting of mobile terminals, which may include more or fewer components than those shown, or some components may be combined, or a different arrangement of components.
The following describes each component of the mobile terminal in detail with reference to fig. 1:
the radio frequency unit 101 may be configured to receive and transmit signals during information transmission and reception or during a call, and specifically, receive downlink information of a base station and then process the downlink information to the processor 110; in addition, the uplink data is transmitted to the base station. Typically, radio frequency unit 101 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, and the like. In addition, the radio frequency unit 101 can also communicate with a network and other devices through wireless communication. The wireless communication may use any communication standard or protocol, including but not limited to GSM (Global System for Mobile communications), GPRS (General Packet Radio Service), CDMA2000(Code Division Multiple Access 2000), WCDMA (Wideband Code Division Multiple Access), TD-SCDMA (Time Division-Synchronous Code Division Multiple Access), FDD-LTE (Frequency Division duplex Long Term Evolution), and TDD-LTE (Time Division duplex Long Term Evolution).
WiFi belongs to short-distance wireless transmission technology, and the mobile terminal can help a user to receive and send e-mails, browse webpages, access streaming media and the like through the WiFi module 102, and provides wireless broadband internet access for the user. Although fig. 1 shows the WiFi module 102, it is understood that it does not belong to the essential constitution of the mobile terminal, and may be omitted entirely as needed within the scope not changing the essence of the invention.
The audio output unit 103 may convert audio data received by the radio frequency unit 101 or the WiFi module 102 or stored in the memory 109 into an audio signal and output as sound when the mobile terminal 100 is in a call signal reception mode, a call mode, a recording mode, a voice recognition mode, a broadcast reception mode, or the like. Also, the audio output unit 103 may also provide audio output related to a specific function performed by the mobile terminal 100 (e.g., a call signal reception sound, a message reception sound, etc.). The audio output unit 103 may include a speaker, a buzzer, and the like.
The a/V input unit 104 is used to receive audio or video signals. The a/V input Unit 104 may include a Graphics Processing Unit (GPU) 1041 and a microphone 1042, the Graphics processor 1041 Processing image data of still pictures or video obtained by an image capturing device (e.g., a camera) in a video capturing mode or an image capturing mode. The processed image frames may be displayed on the display unit 106. The image frames processed by the graphic processor 1041 may be stored in the memory 109 (or other storage medium) or transmitted via the radio frequency unit 101 or the WiFi module 102. The microphone 1042 may receive sounds (audio data) via the microphone 1042 in a phone call mode, a recording mode, a voice recognition mode, or the like, and may be capable of processing such sounds into audio data. The processed audio (voice) data may be converted into a format output transmittable to a mobile communication base station via the radio frequency unit 101 in case of a phone call mode. The microphone 1042 may implement various types of noise cancellation (or suppression) algorithms to cancel (or suppress) noise or interference generated in the course of receiving and transmitting audio signals.
The mobile terminal 100 also includes at least one sensor 105, such as a light sensor, a motion sensor, and other sensors. Specifically, the light sensor includes an ambient light sensor that can adjust the brightness of the display panel 1061 according to the brightness of ambient light, and a proximity sensor that can turn off the display panel 1061 and/or a backlight when the mobile terminal 100 is moved to the ear. As one of the motion sensors, the accelerometer sensor can detect the magnitude of acceleration in each direction (generally, three axes), can detect the magnitude and direction of gravity when stationary, and can be used for applications of recognizing the posture of a mobile phone (such as horizontal and vertical screen switching, related games, magnetometer posture calibration), vibration recognition related functions (such as pedometer and tapping), and the like; as for other sensors such as a fingerprint sensor, a pressure sensor, an iris sensor, a molecular sensor, a gyroscope, a barometer, a hygrometer, a thermometer, and an infrared sensor, which can be configured on the mobile phone, further description is omitted here.
The display unit 106 is used to display information input by a user or information provided to the user. The Display unit 106 may include a Display panel 1061, and the Display panel 1061 may be configured in the form of a Liquid Crystal Display (LCD), an Organic Light-Emitting Diode (OLED), or the like.
The user input unit 107 may be used to receive input numeric or character information and generate key signal inputs related to user settings and function control of the mobile terminal. Specifically, the user input unit 107 may include a touch panel 1071 and other input devices 1072. The touch panel 1071, also referred to as a touch screen, may collect a touch operation performed by a user on or near the touch panel 1071 (e.g., an operation performed by the user on or near the touch panel 1071 using a finger, a stylus, or any other suitable object or accessory), and drive a corresponding connection device according to a predetermined program. The touch panel 1071 may include two parts of a touch detection device and a touch controller. The touch detection device detects the touch direction of a user, detects a signal brought by touch operation and transmits the signal to the touch controller; the touch controller receives touch information from the touch sensing device, converts the touch information into touch point coordinates, sends the touch point coordinates to the processor 110, and can receive and execute commands sent by the processor 110. In addition, the touch panel 1071 may be implemented in various types, such as a resistive type, a capacitive type, an infrared ray, and a surface acoustic wave. In addition to the touch panel 1071, the user input unit 107 may include other input devices 1072. In particular, other input devices 1072 may include, but are not limited to, one or more of a physical keyboard, function keys (e.g., volume control keys, switch keys, etc.), a trackball, a mouse, a joystick, and the like, and are not limited to these specific examples.
Further, the touch panel 1071 may cover the display panel 1061, and when the touch panel 1071 detects a touch operation thereon or nearby, the touch panel 1071 transmits the touch operation to the processor 110 to determine the type of the touch event, and then the processor 110 provides a corresponding visual output on the display panel 1061 according to the type of the touch event. Although the touch panel 1071 and the display panel 1061 are shown in fig. 1 as two separate components to implement the input and output functions of the mobile terminal, in some embodiments, the touch panel 1071 and the display panel 1061 may be integrated to implement the input and output functions of the mobile terminal, and is not limited herein.
The interface unit 108 serves as an interface through which at least one external device is connected to the mobile terminal 100. For example, the external device may include a wired or wireless headset port, an external power supply (or battery charger) port, a wired or wireless data port, a memory card port, a port for connecting a device having an identification module, an audio input/output (I/O) port, a video I/O port, an earphone port, and the like. The interface unit 108 may be used to receive input (e.g., data information, power, etc.) from external devices and transmit the received input to one or more elements within the mobile terminal 100 or may be used to transmit data between the mobile terminal 100 and external devices.
The memory 109 may be used to store software programs as well as various data. The memory 109 may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required by at least one function (such as a sound playing function, an image playing function, etc.), and the like; the storage data area may store data (such as audio data, a phonebook, etc.) created according to the use of the cellular phone, and the like. Further, the memory 109 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device.
The processor 110 is a control center of the mobile terminal, connects various parts of the entire mobile terminal using various interfaces and lines, and performs various functions of the mobile terminal and processes data by operating or executing software programs and/or modules stored in the memory 109 and calling data stored in the memory 109, thereby performing overall monitoring of the mobile terminal. Processor 110 may include one or more processing units; preferably, the processor 110 may integrate an application processor, which mainly handles operating systems, user interfaces, application programs, etc., and a modem processor, which mainly handles wireless communications. It will be appreciated that the modem processor described above may not be integrated into the processor 110.
The mobile terminal 100 may further include a power supply 111 (e.g., a battery) for supplying power to various components, and preferably, the power supply 111 may be logically connected to the processor 110 via a power management system, so as to manage charging, discharging, and power consumption management functions via the power management system.
Although not shown in fig. 1, the mobile terminal 100 may further include a bluetooth module or the like, which is not described in detail herein.
Based on the above mobile terminal hardware structure, various embodiments of the mobile terminal of the present invention are provided.
Referring to fig. 1, in an embodiment of the mobile terminal of the present invention, the mobile terminal includes: a memory 109, a processor 110 and a fingerprinting program stored on the memory 109 and executable on the processor 110, which when executed by the processor 110 implements the steps of:
when the touch operation of the touch area of the mobile terminal is detected, acquiring the color temperature and the brightness of the current ambient light;
respectively comparing the color temperature of the current ambient light with a preset color temperature range, and the brightness of the current ambient light with a preset brightness range to obtain a comparison result;
and controlling the optical fingerprint identification module to set the color of the fingerprint scanning light according to the comparison result, and carrying out fingerprint acquisition and identification based on the set color of the fingerprint scanning light.
Further, the fingerprint recognition program when executed by the processor 110 further implements the steps of:
and when the color temperature of the current ambient light is within a preset color temperature range or the brightness of the current ambient light is within a preset brightness range, controlling the optical fingerprint identification module to set the color of the fingerprint scanning light to be blue.
Further, the fingerprint recognition program when executed by the processor 110 further implements the steps of:
and when the color temperature of the current ambient light is smaller than a preset color temperature limit value, or the brightness of the current ambient light is larger than a preset brightness upper limit value, controlling the optical fingerprint identification module to set the color of the fingerprint scanning light to be gray.
Further, the fingerprint recognition program when executed by the processor 110 further implements the steps of:
and when the color temperature of the current ambient light is greater than a preset color temperature upper limit value, or the brightness of the current ambient light is less than a preset brightness lower limit value, controlling the optical fingerprint identification module to set the color of the fingerprint scanning light to be red.
Further, the fingerprint recognition program when executed by the processor 110 further implements the steps of:
collecting a fingerprint image of a user during touch operation based on the touch area based on the set fingerprint scanning light color;
judging whether the fingerprint in the fingerprint image is a valid fingerprint;
and if so, determining that the fingerprint verification is passed.
Further, the fingerprint recognition program when executed by the processor 110 further implements the steps of:
judging whether the fingerprint in the fingerprint image is matched with the fingerprint in a preset authorized fingerprint database;
if so, judging that the fingerprint in the fingerprint image is a valid fingerprint.
Further, the fingerprint recognition program when executed by the processor 110 further implements the steps of:
if not, sending out prompt information of fingerprint verification failure.
Further, the fingerprint recognition program when executed by the processor 110 further implements the steps of:
and establishing an authorized fingerprint database, wherein the authorized fingerprint database comprises a plurality of authorized fingerprints.
The embodiment of the mobile terminal of the present invention is substantially the same as the following embodiments of the fingerprint identification method, and will not be described herein again.
In order to facilitate understanding of the embodiments of the present invention, a communication network system on which the mobile terminal of the present invention is based is described below.
Referring to fig. 2, fig. 2 is an architecture diagram of a communication Network system according to an embodiment of the present invention, where the communication Network system is an LTE system of a universal mobile telecommunications technology, and the LTE system includes a UE (User Equipment) 201, an E-UTRAN (Evolved UMTS Terrestrial Radio Access Network) 202, an EPC (Evolved Packet Core) 203, and an IP service 204 of an operator, which are in communication connection in sequence.
Specifically, the UE201 may be the terminal 100 described above, and is not described herein again.
The E-UTRAN202 includes eNodeB2021 and other eNodeBs 2022, among others. Among them, the eNodeB2021 may be connected with other eNodeB2022 through backhaul (e.g., X2 interface), the eNodeB2021 is connected to the EPC203, and the eNodeB2021 may provide the UE201 access to the EPC 203.
The EPC203 may include an MME (Mobility Management Entity) 2031, an HSS (Home Subscriber Server) 2032, other MMEs 2033, an SGW (Serving gateway) 2034, a PGW (PDN gateway) 2035, and a PCRF (Policy and Charging Rules Function) 2036, and the like. The MME2031 is a control node that handles signaling between the UE201 and the EPC203, and provides bearer and connection management. HSS2032 is used to provide registers to manage functions such as home location register (not shown) and holds subscriber specific information about service characteristics, data rates, etc. All user data may be sent through SGW2034, PGW2035 may provide IP address assignment for UE201 and other functions, and PCRF2036 is a policy and charging control policy decision point for traffic data flow and IP bearer resources, which selects and provides available policy and charging control decisions for a policy and charging enforcement function (not shown).
The IP services 204 may include the internet, intranets, IMS (IP Multimedia Subsystem), or other IP services, among others.
Although the LTE system is described as an example, it should be understood by those skilled in the art that the present invention is not limited to the LTE system, but may also be applied to other wireless communication systems, such as GSM, CDMA2000, WCDMA, TD-SCDMA, and future new network systems.
Based on the hardware structure of the mobile terminal and the communication network system, the fingerprint identification method provided by the invention has various embodiments.
Referring to fig. 3, a first embodiment of the fingerprint identification method of the present invention provides a fingerprint identification method, including:
step S10, when the touch operation of the touch area of the mobile terminal is detected, the color temperature and the brightness of the current ambient light are obtained;
in the embodiment of the invention, the fingerprint identification method can be applied to mobile terminal equipment with a fingerprint identification function, such as smart phones, tablet computers and the like, and can be particularly applied to scenes of screen unlocking, mobile payment and the like. The mobile terminal in the embodiment adopts an optical fingerprint identification technology, and an optical fingerprint identification module is arranged below a display screen of the mobile terminal. The touch area of the mobile terminal can be a specific fingerprint identification area, including a home key area of the mobile terminal, a display screen of the mobile terminal and other areas.
Referring to fig. 4, fig. 4 is a schematic diagram of an optical fingerprint identification principle of the mobile terminal of this embodiment, that is, the optical fingerprint identification module emits a fingerprint scanning light, the fingerprint scanning light is reflected to the optical fingerprint identification module through a surface of a fingerprint identification area where a fingerprint is touched, and the optical fingerprint identification module receives the reflected fingerprint scanning light and converts the reflected fingerprint scanning light into a fingerprint image, so as to realize fingerprint acquisition and identification.
In addition, the mobile terminal in this embodiment further includes an optical sensor, and the optical sensor can detect the color temperature and the brightness of the external environment light.
The color temperature is a unit of measurement indicating color components contained in light, and theoretically, the color temperature refers to the color of an absolute black body after being heated from absolute zero (-273 ℃), the black body gradually turns from black to red, turns yellow and turns white after being heated, finally emits blue light, and when the black body is heated to a certain temperature, the spectral components contained in the light emitted by the black body are called the color temperature at the temperature, and the unit of measurement is K (kelvin temperature). Thus, color temperature refers to the temperature of a black body when the radiation of a light source is identical in the visible region and the radiation of an absolute black body, and is referred to as the color temperature of the light source. In other words, a light source emits light at a set spectrum, and a pure black body is used to generate the same spectrum at a temperature that is the color temperature of the light source. Different light sources have different color temperatures, for example, a common color temperature of a tungsten lamp (incandescent lamp) is 2800K; the common color temperature of the halogen lamp and the yellow fluorescent lamp is 3000 k; the moonlight and light yellow light daylight lamp is 4100K; the sunlight is 5000K; the most common color temperature of the white light fluorescent lamp is 6500K and the like. When the color temperature is higher, the color emitted by the light source is cooler, and the light source generally undergoes a gradual change process of red-orange-yellow-white-blue-white. The relationship between color temperature and light color is as follows:
the color temperature is less than 3000K, and the color of the light is reddish white;
the color temperature is 3000K-5000K, and the color of the light is white;
the color temperature is more than 5000K, and the color of the light is bluish white
Luminance represents the brightness of lightDark level, luminance of light in cd/m2Or nit, the brightness values of the light under different environments are as follows:
at night: 0.001 to 0.02cd/m2；
And (4) at night: 0.02 to 0.3cd/m2；
In summer under noon sunlight: about 109cd/m2；
Indoor in a sunny day: 100 to 1000cd/m2；
In a cloudy day: 5 to 50cd/m2
First, when a touch operation of a touch area is detected, the color temperature and the brightness of current ambient light are acquired.
Specifically, when the mobile terminal detects a touch operation of a touch area, the optical sensor is triggered to detect the color temperature and the brightness of the current ambient light, and the mobile terminal obtains the color temperature and the brightness of the current ambient light detected by the mobile terminal from the optical sensor.
Step S20, comparing the color temperature and the preset color temperature range of the current ambient light, and the brightness and the preset brightness range of the current ambient light respectively to obtain comparison results;
in this embodiment, in order to avoid that the fingerprint scanning light emitted by the optical fingerprint identification module is susceptible to the external environment light due to single color, the color temperature range and the brightness range may be preset in this embodiment, and based on the color temperature range and the brightness range, the color of the scanning light may be set by the optical fingerprint identification module according to the color temperature and the brightness of the external environment light in this embodiment. Specifically, based on the relationship between the color temperature and the light color, and the brightness value of the light in different environments, the color temperature range is preset, and the corresponding relationship between the color temperature range and the set fingerprint scanning light color, the brightness range, and the corresponding relationship between the brightness range and the set fingerprint scanning light color, for example, the preset color temperature range may be 3000 to 5000K, when the color temperature of the external environment light is within 3000 to 5000K, the set scanning light color corresponds to blue, and when the color temperature of the external environment light is lower than 3000K, the set scanning light color corresponds to gray, and the external environment light is not limited to grayWhen the color temperature of the ambient light is higher than 5000K, the color of the set scanning light corresponds to red; the preset brightness range is 5-100 cd/m2The brightness of the ambient light is 5-100 cd/m2When the brightness of the external environment light is lower than 5cd/m2When the color of the scanning light is corresponding to red, the brightness of the external environment light is higher than 100cd/m2The color of the scanning light set corresponds to gray. Of course, based on the relationship between the color temperature and the light color and the brightness value of the light in different environments, the color temperature range and the brightness range may be set to other reasonable ranges, the corresponding relationship between the color temperature range and the set color of the fingerprint scanning light, and the corresponding relationship between the brightness range and the set color of the fingerprint scanning light, and are not limited to the corresponding relationships given above.
After acquiring the color temperature and the brightness of the current ambient light, the mobile terminal compares the color temperature and the preset color temperature range of the current ambient light, and the brightness and the preset brightness range of the current ambient light respectively to obtain a comparison result.
And step S30, controlling the optical fingerprint identification module to set the color of the fingerprint scanning light according to the comparison result, and carrying out fingerprint collection and identification based on the set color of the fingerprint scanning light.
And then, the mobile terminal controls the optical fingerprint identification module to set the color of the fingerprint scanning light according to the comparison result and based on the corresponding relation between the color temperature range and the set color of the fingerprint scanning light and the corresponding relation between the brightness range and the set color of the fingerprint scanning light. Specifically, referring to fig. 5, in step S30, step S300, according to the comparison result, controlling the optical fingerprint identification module to set the color of the fingerprint scanning light may include:
step S31, when the color temperature of the current ambient light is within a preset color temperature range, or the brightness of the current ambient light is within a preset brightness range, controlling the optical fingerprint identification module to set the color of the fingerprint scanning light to blue;
step S300 may further include:
and step S32, when the color temperature of the current ambient light is smaller than a preset color temperature limit value, or the brightness of the current ambient light is larger than a preset brightness upper limit value, controlling the optical fingerprint identification module to set the color of the fingerprint scanning light to be gray.
Step S300 may further include:
step S33, when the color temperature of the current ambient light is greater than the preset upper limit value of color temperature, or the brightness of the current ambient light is less than the preset lower limit value of brightness, controlling the optical fingerprint identification module to set the color of the fingerprint scanning light to red.
In this embodiment, based on the relationship between the color temperature and the color of the light, the preset color temperature range is 3000-5000K and the preset brightness range is 5-100 cd/m for the brightness value of the light in different environments2Then, after the color temperature and the brightness of the current ambient light acquired by the mobile terminal are obtained, the color temperature and the preset color temperature range of the current ambient light and the brightness and the preset brightness range of the current ambient light are respectively compared, if the color temperature of the current ambient light is within 3000-5000K, or the brightness of the current ambient light is within 5-100 cd/m2The mobile terminal controls the optical fingerprint identification module to set the color of the fingerprint scanning light to be blue; if the color temperature of the current ambient light is lower than 3000K, or the brightness of the current ambient light is greater than 100cd/m2The mobile terminal controls the optical fingerprint identification module to set the color of the fingerprint scanning light to be gray; if the color temperature of the current ambient light is more than 5000K, or the brightness of the current ambient light is less than 5cd/m2And the mobile terminal controls the optical fingerprint identification module to set the color of the fingerprint scanning light to be red.
The optical fingerprint identification module can set the color of the fingerprint scanning light emitted by the optical fingerprint identification module by setting RGB values. Different RGB values correspond to different light colors, the RGB value of the red scan light is # FF0000 (R-255, G-0, B-0), the RGB value of the blue scan light is #0000ff (R-0, G-0, B-255), and the RGB value of the gray scan light is # C0C0 (R-192, G-192, B-192). For example, when the color temperature of the current ambient light acquired by the mobile terminal is 1500K, after comparison, the color temperature of the current ambient light is lower than 3000K, and at this time, the RGB value is set to # C0C0 by the optical fingerprint identification module, then the optical fingerprint identification module emits a gray fingerprint scanning light.
The mobile terminal controls the optical fingerprint identification module to emit the scanning light of the color to perform fingerprint collection and identification after controlling the optical fingerprint identification module to set the color of the fingerprint scanning light according to the color temperature and the brightness of the current ambient light.
In this embodiment, when a touch operation of a touch area of the mobile terminal is detected, a color temperature and brightness of current ambient light are obtained; respectively comparing the color temperature of the current ambient light with a preset color temperature range, and the brightness of the current ambient light with a preset brightness range to obtain a comparison result; and controlling the optical fingerprint identification module to set the color of the fingerprint scanning light according to the comparison result, and carrying out fingerprint acquisition and identification based on the set color of the fingerprint scanning light. In this way, the mobile terminal in this embodiment can control the optical fingerprint identification module to set up the colour of fingerprint scanning light according to the colour temperature and the luminance of current environment light, makes the colour of fingerprint scanning light more adapt to current environment light, has avoided the interference of current environment light to fingerprint scanning light, from this, can improve the speed of fingerprint collection and discernment to promote user experience.
Further, referring to fig. 6, a second embodiment of the fingerprint identification method according to the present invention provides a fingerprint identification method, and in step S30 and step S301, the fingerprint collection and identification based on the set fingerprint scanning light color may include:
step S34, collecting fingerprint images of a user during touch operation based on the touch area based on the set fingerprint scanning light color;
step S35, judging whether the fingerprint in the fingerprint image is an effective fingerprint;
step S36, if yes, determining that the fingerprint verification is passed;
and step S37, if not, sending out prompt information of fingerprint verification failure.
Wherein the step S35 may include: judging whether the fingerprint in the fingerprint image is matched with the fingerprint in a preset authorized fingerprint database; if so, judging that the fingerprint in the fingerprint image is a valid fingerprint. Correspondingly, before step S10, it may include: and establishing an authorized fingerprint database, wherein the authorized fingerprint database comprises a plurality of authorized fingerprints.
In this embodiment, after the mobile terminal controls the optical fingerprint identification module to set the color of the fingerprint scanning light, the optical fingerprint identification module is controlled to emit the scanning light of the color, and under the scanning light of the color, a fingerprint image of a user based on a fingerprint identification area is collected; and then judging whether the fingerprint in the fingerprint image is an effective fingerprint, so that an authorized fingerprint library can be established in advance, wherein the authorized fingerprint library comprises a plurality of authorized fingerprints which are located in a local storage of the mobile terminal, the authorized fingerprint is the fingerprint with the control authority of the mobile terminal, for example, the mobile terminal receives the fingerprint of the left thumb input by the user and authorizes the fingerprint, and the user can perform fingerprint input operation through the left thumb when screen unlocking or mobile payment is performed through fingerprint identification subsequently. Therefore, the mobile terminal can judge whether the fingerprint in the fingerprint image is matched with the fingerprint in the preset authorized fingerprint library or not, specifically, the mobile terminal can construct fingerprint characteristic information by extracting fingerprint characteristic points in the fingerprint image, convert the fingerprint image into a digital signal, then match the digital signal with the fingerprint in the preset authorized fingerprint library, if the fingerprint is matched with the fingerprint, the fingerprint is judged to be an effective fingerprint, the fingerprint is verified to pass, and if the fingerprint is not matched with the authorized fingerprint library, prompt information of fingerprint verification failure is sent out, and a user is prompted to replace the finger or use password input to unlock a screen or carry out mobile payment and the like.
In this embodiment, after the optical fingerprint identification module is controlled by the mobile terminal to set the color of the fingerprint scanning light, the optical fingerprint identification module is controlled to emit the scanning light of the color, and under the scanning light of the color, fingerprint collection and identification are completed.
In addition, the embodiment of the invention also provides a computer readable storage medium.
The computer readable storage medium of the present invention stores a fingerprint identification program, which when executed by a processor performs the following operations:
when the touch operation of the touch area of the mobile terminal is detected, acquiring the color temperature and the brightness of the current ambient light;
respectively comparing the color temperature of the current ambient light with a preset color temperature range, and the brightness of the current ambient light with a preset brightness range to obtain a comparison result;
and controlling the optical fingerprint identification module to set the color of the fingerprint scanning light according to the comparison result, and carrying out fingerprint acquisition and identification based on the set color of the fingerprint scanning light.
The specific embodiment of the fingerprint identification program stored in the computer storage medium and executed by the processor is basically the same as the embodiments of the fingerprint identification method, and is not described herein again.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal device (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A fingerprint identification method is applied to a mobile terminal, the mobile terminal comprises an optical fingerprint identification module, and the method comprises the following steps:
when the touch operation of the touch area of the mobile terminal is detected, acquiring the color temperature and the brightness of the current ambient light;
respectively comparing the color temperature of the current ambient light with a preset color temperature range, and the brightness of the current ambient light with a preset brightness range to obtain a comparison result;
controlling the optical fingerprint identification module to set the color of the fingerprint scanning light according to the comparison result, and carrying out fingerprint acquisition and identification based on the set color of the fingerprint scanning light;
wherein, the step of controlling the optical fingerprint identification module to set the color of the fingerprint scanning light according to the comparison result comprises:
and controlling the optical fingerprint identification module to set the color of the fingerprint scanning light according to the comparison result, based on the corresponding relation between the preset color temperature range and the set color of the fingerprint scanning light and based on the corresponding relation between the brightness range and the set color of the fingerprint scanning light, wherein the color of the fingerprint scanning light comprises blue, gray and red.
2. The fingerprint identification method according to claim 1, wherein the step of controlling the optical fingerprint identification module to set the color of the fingerprint scanning light according to the comparison result comprises:
and when the color temperature of the current ambient light is within a preset color temperature range or the brightness of the current ambient light is within a preset brightness range, controlling the optical fingerprint identification module to set the color of the fingerprint scanning light to be blue.
3. The fingerprint identification method according to claim 1, wherein the step of controlling the optical fingerprint identification module to set the color of the fingerprint scanning light according to the comparison result further comprises:
and when the color temperature of the current ambient light is smaller than a preset color temperature limit value, or the brightness of the current ambient light is larger than a preset brightness upper limit value, controlling the optical fingerprint identification module to set the color of the fingerprint scanning light to be gray.
4. The fingerprint identification method according to claim 1, wherein the step of controlling the optical fingerprint identification module to set the color of the fingerprint scanning light according to the comparison result further comprises:
and when the color temperature of the current ambient light is greater than a preset color temperature upper limit value, or the brightness of the current ambient light is less than a preset brightness lower limit value, controlling the optical fingerprint identification module to set the color of the fingerprint scanning light to be red.
5. The fingerprint recognition method of claim 1, wherein the step of fingerprint acquisition and recognition based on the set fingerprint scanning light color comprises:
collecting a fingerprint image of a user during touch operation based on the touch area based on the set fingerprint scanning light color;
judging whether the fingerprint in the fingerprint image is a valid fingerprint;
and if so, determining that the fingerprint verification is passed.
6. The fingerprint recognition method of claim 5, wherein the step of determining whether the fingerprint in the fingerprint image is a valid fingerprint comprises:
judging whether the fingerprint in the fingerprint image is matched with the fingerprint in a preset authorized fingerprint database;
if so, judging that the fingerprint in the fingerprint image is a valid fingerprint.
7. The fingerprint recognition method according to claim 5, wherein after the step of determining whether the fingerprint in the fingerprint image is a valid fingerprint, further comprising:
if not, sending out prompt information of fingerprint verification failure.
8. The fingerprint identification method according to claim 1, wherein the step of obtaining the color temperature and brightness of the current ambient light before the step of obtaining the color temperature and brightness of the current ambient light when the touch operation of the touch area of the mobile terminal is detected comprises:
and establishing an authorized fingerprint database, wherein the authorized fingerprint database comprises a plurality of authorized fingerprints.
9. A mobile terminal, characterized in that the mobile terminal comprises: a memory, a processor, and a fingerprinting program stored on the memory and executable on the processor, the fingerprinting program when executed by the processor implementing the steps of:
when the touch operation of the touch area of the mobile terminal is detected, acquiring the color temperature and the brightness of the current ambient light;
respectively comparing the color temperature of the current ambient light with a preset color temperature range, and the brightness of the current ambient light with a preset brightness range to obtain a comparison result;
and controlling the optical fingerprint identification module to set the color of the fingerprint scanning light according to the comparison result, and carrying out fingerprint acquisition and identification based on the set color of the fingerprint scanning light.
10. A computer-readable storage medium having a fingerprint recognition program stored thereon, the fingerprint recognition program when executed by a processor implementing the steps of:
when touch operation of a touch area of the mobile terminal is detected, acquiring the color temperature and brightness of current ambient light;
respectively comparing the color temperature of the current ambient light with a preset color temperature range, and the brightness of the current ambient light with a preset brightness range to obtain a comparison result;
and controlling the optical fingerprint identification module to set the color of the fingerprint scanning light according to the comparison result, and carrying out fingerprint acquisition and identification based on the set color of the fingerprint scanning light.
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| CN111259708A (en) * | 2018-12-03 | 2020-06-09 | 敦泰电子有限公司 | Fingerprint identification method, storage medium, fingerprint identification system and intelligent device |
| CN110532993B (en) * | 2019-09-04 | 2022-03-08 | 深圳市捷顺科技实业股份有限公司 | Face anti-counterfeiting method and device, electronic equipment and medium |
| CN110826438B (en) | 2019-10-24 | 2023-08-29 | 维沃移动通信有限公司 | Display method and electronic equipment |
| TWI800822B (en) * | 2020-04-27 | 2023-05-01 | 聯詠科技股份有限公司 | Integrated driving device and operation method thereof |
| CN113761977A (en) * | 2020-06-04 | 2021-12-07 | 北京小米移动软件有限公司 | Optical fingerprint module and signal processing method |
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