CN110945526B - Under-screen fingerprint acquisition method and device, electronic equipment and storage medium - Google Patents
Under-screen fingerprint acquisition method and device, electronic equipment and storage medium Download PDFInfo
- Publication number
- CN110945526B CN110945526B CN201980002471.7A CN201980002471A CN110945526B CN 110945526 B CN110945526 B CN 110945526B CN 201980002471 A CN201980002471 A CN 201980002471A CN 110945526 B CN110945526 B CN 110945526B
- Authority
- CN
- China
- Prior art keywords
- fingerprint
- exposure time
- fingerprint image
- image sensor
- image
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- 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
-
- 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
-
- 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
- G06V10/147—Details of sensors, e.g. sensor lenses
-
- 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
- G06V40/1341—Sensing with light passing through the finger
Abstract
The application provides an off-screen fingerprint acquisition method, an off-screen fingerprint acquisition device, electronic equipment and a storage medium, wherein the method comprises the following steps: under the irradiation of a light source, a first fingerprint image of a user is acquired; determining a target exposure time of the image sensor according to the pixel value of the first fingerprint image; controlling the exposure time of the image sensor to be a target exposure time; at a target exposure time, a second fingerprint image of the user is acquired. The method and the device realize the adjustment of the exposure time of the image sensor according to the current environment, further continuously collect the fingerprint image of the user at the target exposure time, effectively improve the quality of the fingerprint image, and further avoid the influence of the ambient light on the fingerprint collection under the screen.
Description
Technical Field
The present application relates to the field of fingerprint acquisition technologies, and in particular, to an off-screen fingerprint acquisition method and apparatus, an electronic device, and a storage medium.
Background
Fingerprint identification technology is an identification means for verifying identity through fingerprint comparison, and is the most widely applied biological characteristic identification technology at present. Along with the development of terminal equipment and the development of fingerprint identification technology, the demands of the fingerprint identification technology in the fields of personal computers, smart phones and door locks are expanding continuously.
In the prior art, when acquiring a fingerprint image of a user, infrared light is generally used as a light source of a fingerprint device under a liquid crystal display (Liquid Crystal Display, LCD) screen, light irradiates on a finger, passes through the finger to transmit or reflect, passes through a mobile phone screen and a special optical lens, and is received by a sensor under the screen, so that fingerprint image acquisition and fingerprint identification are realized.
However, in the prior art, since the sunlight also contains an infrared band in nature, when the light of the sunlight is strong, the fingerprint image of a normal light source can be seriously disturbed, so that the quality of fingerprint image acquisition is poor.
Disclosure of Invention
The application provides an under-screen fingerprint acquisition method, an under-screen fingerprint acquisition device, electronic equipment and a storage medium, so as to realize fingerprint image acquisition and improve fingerprint image quality.
In a first aspect, an embodiment of the present application provides an on-screen fingerprint acquisition method, including:
under the irradiation of a light source, a first fingerprint image of a user is acquired;
determining a target exposure time of the image sensor according to the pixel value of the first fingerprint image;
controlling the exposure time of the image sensor to be a target exposure time;
at a target exposure time, a second fingerprint image of the user is acquired.
According to the embodiment of the application, the exposure time of the image sensor is determined according to the acquired fingerprint image of the user, so that the exposure time of the image sensor is adjusted according to the current environment, further the fingerprint image of the user is continuously acquired at the target exposure time, the quality of the fingerprint image can be effectively improved, and further the influence of ambient light on the acquisition of the fingerprint under the screen is avoided.
In one possible embodiment, before determining the target exposure time of the image sensor based on the pixel values of the first fingerprint image, further comprising:
determining whether the exposure time of the image sensor needs to be adjusted according to a preset strategy;
if the exposure time of the image sensor needs to be adjusted, determining the target exposure time of the image sensor according to the pixel value of the first fingerprint image.
In the embodiment of the application, whether the exposure time of the image sensor needs to be adjusted is determined according to the preset strategy, so that the adjustment of the exposure time of the image sensor under the condition of high fingerprint image quality is avoided, and the quality of the fingerprint image is further ensured.
In one possible implementation, determining a target exposure time of the image sensor from pixel values of the first fingerprint image includes:
Acquiring a first relation between a plurality of global average values and a plurality of exposure times, wherein the global average values are average values of all pixel values of a fingerprint image of a user;
and determining the target exposure time through the first relation and the global average value of the first fingerprint image.
In the embodiment of the application, the confirmation of the target exposure time is realized according to the relation between the global average values and the exposure times and the global average value of the first fingerprint image.
In one possible implementation, obtaining a first relationship between the plurality of global averages and the plurality of exposure times includes:
respectively acquiring fingerprint images at a plurality of exposure times;
determining global average values corresponding to the exposure times respectively through fingerprint images acquired at the exposure times respectively;
a first relationship between the plurality of exposure times and global averages corresponding to each of the plurality of exposure times is determined.
Optionally, the method for acquiring the fingerprint under the screen provided by the embodiment of the application further includes:
judging whether the second fingerprint image meets the saturation condition or not;
and if the second fingerprint image meets the saturation condition, prompting the user that the fingerprint image acquisition fails.
In the embodiment of the application, the fingerprint image acquisition failure is prompted to a user when the fingerprint image is saturated by judging whether the fingerprint image acquired under the target exposure time meets the saturation condition.
Optionally, the method for acquiring the fingerprint under the screen provided by the embodiment of the application further includes:
and if the second fingerprint image does not meet the saturation condition, identifying the second fingerprint image.
In the embodiment of the application, the fingerprint image is identified when the fingerprint image is unsaturated by judging whether the fingerprint image collected under the target exposure time meets the saturation condition.
In one possible implementation, the preset strategy includes:
if the number of the pixel values exceeding the preset threshold value in the pixel values of the first fingerprint image does not reach the preset number, the exposure time of the image sensor does not need to be adjusted;
if the number of pixel values exceeding the preset threshold value in the pixel values of the first fingerprint image reaches the preset number, the exposure time of the image sensor needs to be adjusted.
In another possible embodiment, the preset policy includes:
if all the pixel values in the continuous area in the first fingerprint image are larger than the first pixel value and smaller than or equal to the second pixel value, the exposure time of the image sensor needs to be adjusted, the second pixel value is the maximum pixel value in the first fingerprint image, and the first pixel value is smaller than the second pixel value.
The following describes an apparatus, an electronic device, a computer readable storage medium, and a computer program product provided by the embodiments of the present application, and the content and effects thereof may refer to the home insurance recommendation method provided by the embodiments of the present application, which are not described in detail.
In a second aspect, an embodiment of the present application provides an under-screen fingerprint acquisition device, including:
the acquisition module is used for acquiring a first fingerprint image of a user under the irradiation of the light source;
the first determining module is used for determining the target exposure time of the image sensor according to the pixel value of the first fingerprint image;
the control module is used for controlling the exposure time of the image sensor to be the target exposure time;
and the acquisition module is also used for acquiring a second fingerprint image of the user under the target exposure time.
Optionally, the device for acquiring an on-screen fingerprint provided by the embodiment of the present application further includes:
the second determining module is used for determining whether the exposure time of the image sensor needs to be adjusted according to a preset strategy;
and the first determining module is used for determining the target exposure time of the image sensor according to the pixel value of the first fingerprint image if the exposure time of the image sensor needs to be adjusted.
Optionally, the first determining module includes:
The acquisition sub-module is used for acquiring a first relation between a plurality of global average values and a plurality of exposure times, wherein the global average values are average values of all pixel values of a fingerprint image of a user;
and the determining submodule is used for determining the target exposure time through the first relation and the global average value of the first fingerprint image.
Optionally, the obtaining sub-module is specifically configured to:
respectively acquiring fingerprint images at a plurality of exposure times;
determining global average values corresponding to the exposure times respectively through fingerprint images acquired at the exposure times respectively;
a first relationship between the plurality of exposure times and global averages corresponding to each of the plurality of exposure times is determined.
Optionally, the device for acquiring an on-screen fingerprint provided by the embodiment of the present application further includes:
the judging module is used for judging whether the second fingerprint image meets the saturation condition or not;
and the prompting module is used for prompting the user that the fingerprint image acquisition fails if the second fingerprint image meets the saturation condition.
Optionally, the device for acquiring an on-screen fingerprint provided by the embodiment of the present application further includes:
and the identification module is used for identifying the second fingerprint image if the second fingerprint image does not meet the saturation condition.
Optionally, the preset strategy includes:
If the number of the pixel values exceeding the preset threshold value in the pixel values of the first fingerprint image does not reach the preset number, the exposure time of the image sensor does not need to be adjusted;
if the number of pixel values exceeding the preset threshold value in the pixel values of the first fingerprint image reaches the preset number, the exposure time of the image sensor needs to be adjusted.
Optionally, the preset policy includes:
if all the pixel values in the continuous area in the first fingerprint image are larger than the first pixel value and smaller than or equal to the second pixel value, the exposure time of the image sensor needs to be adjusted, the second pixel value is the maximum pixel value in the first fingerprint image, and the first pixel value is smaller than the second pixel value.
In a third aspect, an embodiment of the present application provides an electronic device, including:
at least one processor; and
a memory communicatively coupled to the at least one processor; wherein the method comprises the steps of
The memory stores instructions executable by the at least one processor to enable the at least one processor to perform a method as provided by the first aspect or an implementation of the first aspect.
Optionally, the electronic device provided by the embodiment of the present application further includes: the fingerprint acquisition device comprises a light source, an image sensor, an optical filter and a lens, wherein the light source is connected with at least one processor and used for providing illumination for acquiring fingerprint images; the image sensor is connected with at least one processor and is used for collecting fingerprint images; the optical filter is positioned above the image sensor and is used for filtering the light transmitted through the lens.
Optionally, the light source is an infrared light source, and is used for emitting infrared light;
the light source comprises at least one infrared lamp, or the light source comprises at least one vertical cavity surface emitting laser (Vertical Cavity Surface Emitting Laser, VCSEL).
Optionally, the light source emits light at a wavelength of 940nm or 850nm.
Optionally, the light source is located at any of the following positions:
the back of the backlight module of the screen, the chin position of the screen or the backlight light supplementing area of the screen.
Optionally, an antireflection film is plated on the lens.
In a fourth aspect, embodiments of the present application provide a non-transitory computer-readable storage medium storing computer instructions for causing a computer to perform a method as provided by the first aspect or an implementation of the first aspect.
In a fifth aspect, embodiments of the present application provide a computer program product comprising: executable instructions for implementing a method as provided in the first aspect or the alternative of the first aspect.
In a sixth aspect, an embodiment of the present application provides an under-screen fingerprint acquisition device, which is suitable for an electronic device having a liquid crystal display.
The under-screen fingerprint acquisition device comprises a light source, an image sensor and a lens, wherein the light source is used for providing illumination for a finger above the liquid crystal display screen so as to generate fingerprint detection light on the finger; the lens and the image sensor are used for being arranged below the liquid crystal display screen, wherein the lens is used for converging fingerprint detection light passing through the liquid crystal display screen to the image sensor and performing fingerprint imaging on the image sensor so as to acquire fingerprint images of the finger; the image sensor is used for acquiring a first fingerprint image of the finger under the irradiation of the light source at a first exposure time, wherein the first fingerprint image is used for determining a second exposure time of the image sensor, and the second exposure time is used as a target exposure time for fingerprint imaging of the fingerprint sensor; and the image sensor is further used for acquiring a second fingerprint image of the finger according to the target exposure time.
In one possible embodiment, the light source comprises at least one vertical cavity surface emitting infrared laser for providing infrared light having a wavelength of 940nm to a finger over the liquid crystal display to generate fingerprint detection light, wherein the surface of the lens is formed with an antireflection film having an antireflection effect for infrared light having a wavelength of 940 nm.
In a possible implementation manner, the device for acquiring the fingerprint under the screen provided by the embodiment of the application further comprises a light filter formed between the lens and the fingerprint sensor, wherein the light filter is used for filtering interference light entering the fingerprint sensor, and a light-transmitting band of the light filter corresponds to a light-emitting band of the light source.
The application provides an under-screen fingerprint acquisition method, an under-screen fingerprint acquisition device, electronic equipment and a storage medium, wherein a first fingerprint image of a user is acquired under the irradiation of a light source; then determining target exposure time of the image sensor according to the pixel value of the first fingerprint image; further controlling the exposure time of the image sensor to be the target exposure time; and finally, under the target exposure time, acquiring a second fingerprint image of the user. The exposure time of the image sensor is determined according to the acquired fingerprint image of the user, so that the exposure time of the image sensor is adjusted according to the current environment, the fingerprint image of the user is further continuously acquired at the target exposure time, the quality of the fingerprint image can be effectively improved, and the influence of ambient light on the acquisition of fingerprints under the screen is further avoided.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions of the prior art, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it will be obvious that the drawings in the following description are some embodiments of the present application, and that other drawings can be obtained according to these drawings without inventive effort to a person skilled in the art.
FIG. 1 is an exemplary application scenario diagram provided by an embodiment of the present application;
FIGS. 2A-2C are schematic diagrams of the locations of infrared lamps provided by examples of the present application;
FIG. 3 is a flowchart of an off-screen fingerprint acquisition method according to an embodiment of the present application;
FIG. 4 is a schematic diagram of a first relationship provided by an embodiment of the present application;
FIG. 5 is a flowchart of an off-screen fingerprint acquisition method according to another embodiment of the present application;
FIG. 6 is a flowchart of an off-screen fingerprint acquisition method according to another embodiment of the present application;
FIG. 7 is a schematic diagram of an off-screen fingerprint acquisition device according to an embodiment of the present application;
FIG. 8 is a schematic diagram of an off-screen fingerprint acquisition device according to another embodiment of the present application;
fig. 9 is a schematic structural diagram of an electronic device according to an embodiment of the present application;
Fig. 10 is a schematic structural diagram of an electronic device according to another embodiment of the application.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments of the present application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
The terms "first," "second," "third," "fourth" and the like in the description and in the claims and in the above drawings, if any, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the application described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Fingerprint identification technology is an identification means for verifying identity through fingerprint comparison, and is the most widely applied biological characteristic identification technology at present. Along with the development of terminal equipment and the development of fingerprint identification technology, the demands of the fingerprint identification technology in the fields of personal computers, smart phones and door locks are expanding continuously. In the prior art, when acquiring a fingerprint image of a user, infrared light is generally used as a light source of an under-screen fingerprint device, light irradiates the finger, passes through a mobile phone screen and a special optical lens after being transmitted or reflected by the finger, and is received by an under-screen sensor, so that fingerprint image acquisition and fingerprint identification are realized. However, interference to the fingerprint image when the sunlight is strong cannot be avoided, resulting in poor quality of fingerprint image acquisition. In order to solve the technical problems, the embodiment of the application provides an off-screen fingerprint acquisition method, an off-screen fingerprint acquisition device, electronic equipment and a storage medium.
In the following, an exemplary application scenario of an embodiment of the present application is described.
The method for acquiring the fingerprint under the screen provided by the embodiment of the application can be executed by the device for acquiring the fingerprint under the screen provided by the embodiment of the application, the device for acquiring the fingerprint under the screen provided by the embodiment of the application can be part or all of terminal equipment, and the terminal equipment can be, for example, a television, a notebook computer, a tablet computer, mobile equipment, screen throwing equipment and the like. Fig. 1 is an exemplary application scenario provided by the embodiment of the present application, as shown in fig. 1, the method for capturing an on-screen fingerprint according to the embodiment of the present application may be applied to a terminal device, where the terminal device may include a touch pad 11 (Cover Grass, CG), an LCD display Module 12 (LCD Module, LCM), a backlight 13, a backlight strip 14, a light source 15, a lens 16, an optical filter 17, and an image sensor 18. The light emitted by the light source 15 is emitted to the finger of the user through the backlight 13, the LCM12 and the CG11, reflected or transmitted inside the finger, and then emitted to the lens 16 and the optical filter 17 through the touch panel 11, the LCM12 and the backlight 13 again to reach the image sensor 18, so as to obtain a fingerprint image. The embodiment of the application does not limit the light emitting wave band of the light source, in one possible implementation, the light source is an infrared light source, and the light emitted by the light source is described below by taking the light source as an infrared light source as an example; the wavelength of the optical filter corresponds to the infrared light and is used for transmitting the infrared light and eliminating the interference of light except the infrared light; the lens 16 may be a high lens to increase the transmittance of infrared light and thus the utilization of infrared light.
The light source may include at least one infrared lamp, for example, 2, 4, 6, etc., and the wavelength of the infrared lamp may be 940nm, 850nm, etc., which is not limited in the embodiment of the present application, and in addition, the position of the infrared lamp is not limited in the embodiment of the present application, and fig. 2A-2C are schematic diagrams of the positions of the infrared lamps provided in the embodiment of the present application, and as shown in fig. 2A, the infrared lamps may be disposed behind the backlight and distributed around the fingerprint area; as shown in fig. 2B, the infrared lamp may be disposed in the chin area of the screen; as shown in fig. 2C, the infrared lamps may be disposed in a backlight band that also includes a backlight, as the embodiments of the application are not limited in this respect.
Fig. 3 is a flowchart of an off-screen fingerprint acquisition method according to an embodiment of the present application, where the method may be performed by an off-screen fingerprint acquisition device, and the device may be implemented in software and/or hardware, for example: the device may be part or all of a terminal device, where the terminal device may be a personal computer, a smart phone, a user terminal, a tablet computer, a wearable device, etc., and the device may also be a central processing unit, etc., and the method for acquiring an off-screen fingerprint is described below by using the terminal device as an execution body, as shown in fig. 3, where the method for acquiring an off-screen fingerprint provided in the embodiment of the present application may include:
Step S101: under the irradiation of the light source, a first fingerprint image of the user is acquired.
The embodiment of the application does not limit the structure, the type, the position and the like of the light source, and can refer to the introduction of the light source in an application scene without repeated description. In one possible embodiment, the light source is an infrared lamp.
In one possible implementation, the light emitting wavelength of the infrared lamp is 940nm, and as strong light interference of fingerprints under the screen is mainly caused by sunlight in natural environment, the infrared light of 940nm is weak in sunlight near the ground according to the spectral distribution of the sunlight, so that the interference of the sunlight can be better avoided by selecting the infrared lamp with the light emitting wavelength of 940 nm.
Under the irradiation of the infrared lamp, the first fingerprint image of the user is collected, and the first fingerprint image of the user can be collected through the sensor.
Step S102: a target exposure time of the image sensor is determined based on the pixel values of the first fingerprint image.
After the first fingerprint image is obtained, the first fingerprint image may be preprocessed, for example, abnormal values of pixel points in the first fingerprint image may be removed, binarization processing may be performed on the first fingerprint image, pixel values of the first fingerprint image may be obtained, and the embodiment of the present application is not limited thereto.
After the pixel value of the first fingerprint image is acquired, the quality of the first fingerprint image may be determined according to the pixel value of the first fingerprint image, and then the exposure time of the image sensor may be adjusted according to the quality of the first fingerprint image to determine the target exposure time of the image sensor. The embodiment of the application does not limit the specific implementation way for determining the target exposure time of the image sensor according to the pixel value of the first fingerprint image.
In one possible embodiment, determining the target exposure time of the image sensor from the pixel values of the first fingerprint image comprises:
acquiring a first relation between a plurality of global average values and a plurality of exposure times, wherein the global average values are average values of all pixel values of a fingerprint image of a user; and determining the target exposure time through the first relation and the global average value of the first fingerprint image.
The first relationship between the plurality of global averages and the plurality of exposure times may be represented in the form of a relational function, an image, a table, or the like, to which embodiments of the present application are not limited. The first relationship between the plurality of global averages and the plurality of exposure times may be obtained through stored data in the terminal device, or the first relationship between the plurality of global averages and the plurality of exposure times may be determined through calculation, which is not limited in the embodiment of the present application.
In one possible implementation, obtaining a first relationship between the plurality of global averages and the plurality of exposure times includes:
respectively acquiring fingerprint images at a plurality of exposure times; determining global average values corresponding to the exposure times respectively through fingerprint images acquired at the exposure times respectively; a first relationship between the plurality of exposure times and global averages corresponding to each of the plurality of exposure times is determined.
The fingerprint image is acquired at a plurality of exposure times, for example, the fingerprint image may be acquired at a plurality of exposure times with preset time intervals, and as shown in fig. 4, fig. 4 is an exemplary diagram of a first relationship provided in the embodiment of the present application, where the exposure times are 10 milliseconds (ms), 40ms, 70ms … … ms 340ms, 370ms, 400ms, and the like. And respectively acquiring a plurality of fingerprint images at the exposure time, calculating a global average value of each fingerprint image, wherein the global average value is an average value of all pixel values of the fingerprint images, and then determining the global average value corresponding to each exposure time through the fingerprint images acquired at each exposure time. Referring to the ordinate in fig. 4, the embodiment of the present application does not limit the specific value of the global average, and taking the range of pixel values of 0-5500 as an example, calculating the global average may normalize the pixel values and then map to the range required by the user. Finally, a relation function between a plurality of exposure times and the global average value corresponding to each of the plurality of exposure times can be determined by means of piecewise linear fitting, curve fitting and the like, and in fig. 4, the relation curve between the exposure times and the global average value is shown.
After determining the first relationship, a target exposure time may be determined by the first relationship and a global average of the first fingerprint image. The calculation can be performed by the following formula:
wherein t1 is target exposureLight time; t0 is the exposure time of the image sensor when the first fingerprint image is acquired; t (T) target Is a standard exposure time, and in one possible implementation, the standard exposure time may be obtained through mass production calibration, and the fingerprint image obtained with the standard exposure time may have a corresponding standard global average value of 2500, which is not limited to this embodiment of the present application. In another possible implementation, the standard global average is the median of the pixel value range, and the embodiment of the present application is not limited thereto; t represents the global average of the first fingerprint image, the corresponding exposure time in the first relationship.
Step S103: the exposure time of the image sensor is controlled to be a target exposure time.
The embodiment of the application does not limit the specific implementation way of controlling the exposure time of the image sensor to be the target exposure time by the terminal equipment, so long as the exposure time of the image sensor can be controlled to be the target exposure time.
Step S104: at a target exposure time, a second fingerprint image of the user is acquired.
After the exposure time of the image sensor is controlled to be the target exposure time, continuing to acquire a second fingerprint image of the user, wherein the second fingerprint image is acquired under the target exposure time.
According to the method for acquiring the fingerprints under the screen, the first fingerprint image of the user is acquired under the irradiation of the light source; then determining target exposure time of the image sensor according to the pixel value of the first fingerprint image; further controlling the exposure time of the image sensor to be the target exposure time; and finally, under the target exposure time, acquiring a second fingerprint image of the user. The exposure time of the image sensor is determined according to the collected fingerprint image of the user, so that the adjustment of the exposure time of the light source according to the current environment is realized, the fingerprint image of the user is further collected continuously at the target exposure time, the quality of the fingerprint image can be effectively improved, and the influence of ambient light on the fingerprint collection under the screen is further avoided.
In a possible implementation manner, fingerprint capturing may be performed under different environments, and there may be situations where the exposure time of the image sensor does not need to be adjusted, based on which, fig. 5 is a schematic flow chart of an off-screen fingerprint capturing method according to another embodiment of the present application, where the method may be performed by an off-screen fingerprint capturing device, and the device may be implemented by software and/or hardware, for example: the device may be part or all of a terminal device, where the terminal device may be a personal computer, a smart phone, a user terminal, a tablet computer, a wearable device, etc., and the device may also be a central processing unit, etc., where the method for acquiring an off-screen fingerprint is described below by using the terminal device as an execution body, as shown in fig. 5, the method for acquiring an off-screen fingerprint provided in the embodiment of the present application may further include, before step S102:
Step S201: and determining whether the exposure time of the image sensor needs to be adjusted according to a preset strategy.
The embodiment of the application does not limit the specific implementation manner of determining whether the exposure time of the image sensor needs to be adjusted according to the preset strategy, and in one possible implementation manner, if the number of the pixel values exceeding the preset threshold value in the pixel values of the first fingerprint image does not reach the preset number, the exposure time of the image sensor does not need to be adjusted; if the number of pixel values exceeding the preset threshold value in the pixel values of the first fingerprint image reaches the preset number, the exposure time of the image sensor needs to be adjusted.
Determining whether the exposure time of the image sensor needs to be adjusted is achieved by judging the number of pixel values exceeding a preset threshold value in the pixel values of the first fingerprint image, wherein the specific numerical value of the preset threshold value is not limited, and in a possible implementation manner, the preset threshold value is the maximum value of the pixel values in the terminal equipment, for example, in the terminal equipment, the maximum value of the pixel values is 255, and the preset threshold value is 255; in addition, the specific number of the preset number is not limited in the embodiment of the present application, for example, if the preset threshold exists in the pixel value of the first fingerprint image, the exposure time of the image sensor needs to be adjusted, and then the preset number may be set to 1, which is not limited in the embodiment of the present application.
In another possible embodiment, the preset policy includes:
if all the pixel values in the continuous area in the first fingerprint image are larger than the first pixel value and smaller than or equal to the second pixel value, the exposure time of the image sensor needs to be adjusted, the second pixel value is the maximum pixel value in the first fingerprint image, and the first pixel value is smaller than the second pixel value.
The second pixel value is the largest pixel value in the first fingerprint image, e.g. the range of pixel values of the first fingerprint image is 0-245, the largest pixel value in the first fingerprint image is 245, i.e. the second pixel value is 245; the first pixel value is smaller than the second pixel value, for example, the first pixel value is smaller than the second pixel value by 5, and the second pixel value is 245, for example, the first pixel value is 240, which is not limited in the embodiment of the present application. In addition, optionally, the number of pixels in the continuous area may be greater than or equal to the number of preset pixels, which is not limited in the embodiment of the present application.
If it is determined that the exposure time of the image sensor needs to be adjusted, step S102 is performed.
After the second fingerprint image is acquired, the second fingerprint image needs to be further processed, and in a possible implementation, fig. 6 is a schematic flow chart of an off-screen fingerprint acquisition method according to still another embodiment of the present application, where the method may be performed by an off-screen fingerprint acquisition device, and the device may be implemented by software and/or hardware, for example: the device may be part or all of a terminal device, where the terminal device may be a personal computer, a smart phone, a user terminal, a tablet computer, a wearable device, etc., and the device may also be a central processing unit, etc., and the method for acquiring an off-screen fingerprint is described below by using the terminal device as an execution body, as shown in fig. 6, where the method for acquiring an off-screen fingerprint provided in the embodiment of the present application may further include:
Step S301: and judging whether the second fingerprint image meets the saturation condition.
The saturation condition may be that there is saturation of pixel values in the second fingerprint image, or that the number of saturated pixel values in the second fingerprint image reaches a preset threshold, which is not limited by the embodiment of the present application. If the second fingerprint image meets the saturation condition, the second fingerprint image is saturated, and the quality of the second fingerprint image is poor; if the second fingerprint image does not meet the saturation condition, the second fingerprint image can be processed in the next step.
If the second fingerprint image satisfies the saturation condition, step S302 is performed.
Step S302: and prompting the user that the fingerprint image acquisition fails.
The embodiment of the application does not limit the specific implementation form for prompting the user that the fingerprint image acquisition fails, for example, the user can be pushed with a message of the fingerprint image acquisition failure or a message of the fingerprint image acquisition needing to be re-acquired, and the like. For another example, the user may be prompted to fail to acquire the fingerprint image by directly not executing the service requiring fingerprint determination.
If the second fingerprint image does not satisfy the saturation condition, step S303 is performed.
Step S303: a second fingerprint image is identified.
After the second fingerprint image is acquired, the second fingerprint image is identified for performing a service related to fingerprint identification in the terminal device, for example: opening a screen, authenticating an identity, etc. The embodiments of the present application are not limited in this regard.
The following are examples of the apparatus of the present application that may be used to perform the method embodiments of the present application. For details not disclosed in the embodiments of the apparatus of the present application, please refer to the embodiments of the method of the present application.
Fig. 7 is a schematic structural diagram of an on-screen fingerprint acquisition device according to an embodiment of the present application, where the device may be implemented in software and/or hardware, for example: the device may be part or all of a terminal device, where the terminal device may be a personal computer, a smart phone, a user terminal, a tablet computer, a wearable device, etc., as shown in fig. 7, an under-screen fingerprint acquisition device provided by an embodiment of the present application may include:
the acquisition module 71 is configured to acquire a first fingerprint image of the user under irradiation of the light source.
A first determining module 72 is configured to determine a target exposure time of the image sensor based on the pixel values of the first fingerprint image.
A control module 73 for controlling the exposure time of the image sensor to be the target exposure time.
The acquisition module 71 is further configured to acquire a second fingerprint image of the user at the target exposure time.
Optionally, fig. 8 is a schematic structural diagram of an off-screen fingerprint acquisition device according to another embodiment of the present application, where the device may be implemented in software and/or hardware, for example: the device may be part or all of a terminal device, where the terminal device may be a personal computer, a smart phone, a user terminal, a tablet computer, a wearable device, etc., as shown in fig. 8, the device for acquiring an on-screen fingerprint provided by the embodiment of the present application may further include:
A second determining module 74 is configured to determine whether the exposure time of the image sensor needs to be adjusted according to a preset policy.
The first determining module 72 is configured to determine, if the exposure time of the image sensor needs to be adjusted, a target exposure time of the image sensor according to the pixel value of the first fingerprint image.
In one possible implementation, the preset strategy includes:
if the number of the pixel values exceeding the preset threshold value in the pixel values of the first fingerprint image does not reach the preset number, the exposure time of the image sensor does not need to be adjusted;
if the number of pixel values exceeding the preset threshold value in the pixel values of the first fingerprint image reaches the preset number, the exposure time of the image sensor needs to be adjusted.
In another possible embodiment, the preset policy includes:
if all the pixel values in the continuous area in the first fingerprint image are larger than the first pixel value and smaller than or equal to the second pixel value, the exposure time of the image sensor needs to be adjusted, the second pixel value is the maximum pixel value in the first fingerprint image, and the first pixel value is smaller than the second pixel value.
Alternatively, as shown in fig. 8, the first determining module 72 includes:
An obtaining sub-module 721, configured to obtain a first relationship between a plurality of global average values and a plurality of exposure times, where the global average values are average values of all pixel values of the fingerprint image of the user;
a determining sub-module 722 is configured to determine a target exposure time by using the first relationship and the global average of the first fingerprint image.
Optionally, the acquiring sub-module 721 is specifically configured to:
respectively acquiring fingerprint images at a plurality of exposure times;
determining global average values corresponding to the exposure times respectively through fingerprint images acquired at the exposure times respectively;
a first relationship between the plurality of exposure times and global averages corresponding to each of the plurality of exposure times is determined.
Optionally, as shown in fig. 8, the device for capturing an on-screen fingerprint provided by the embodiment of the present application may further include:
a judging module 75, configured to judge whether the second fingerprint image meets a saturation condition;
and the prompting module 76 is configured to prompt the user that the fingerprint image acquisition fails if the second fingerprint image satisfies the saturation condition.
Optionally, as shown in fig. 8, the device for capturing an on-screen fingerprint provided by the embodiment of the present application may further include:
the identifying module 77 is configured to identify the second fingerprint image if the second fingerprint image does not satisfy the saturation condition.
The embodiment of the apparatus provided in the present application is merely illustrative, and the module division in fig. 7 and 8 is merely a logic function division, and there may be other division manners in practical implementation. For example, multiple modules may be combined or may be integrated into another system. The coupling of the individual modules to each other may be achieved by means of interfaces which are typically electrical communication interfaces, but it is not excluded that they may be mechanical interfaces or other forms of interfaces. Thus, the modules illustrated as separate components may or may not be physically separate, may be located in one place, or may be distributed in different locations on the same or different devices.
Fig. 9 is a schematic structural diagram of an electronic device according to an embodiment of the present application, as shown in fig. 9, the electronic device includes:
a processor 91, a memory 92, a transceiver 93, and a computer program; wherein the transceiver 93 enables data transmission with other devices, a computer program is stored in the memory 92 and configured to be executed by the processor 91, the computer program comprising instructions for performing the above-mentioned off-screen fingerprint acquisition method, the content and effects of which refer to the method embodiments.
Optionally, fig. 10 is a schematic structural diagram of an electronic device according to another embodiment of the present application, as shown in fig. 10, where the electronic device according to the embodiment of the present application may further include: a light source 15, an image sensor 18, a filter 17 and a lens 16, the light source 15 being connected to at least one processor 19 for providing illumination for capturing a fingerprint image; the image sensor 18 is connected to the at least one processor 19 for capturing fingerprint images; the filter 17 is located above the image sensor 18 and is used for filtering the light transmitted through the lens 16.
Where not clearly shown in fig. 10, reference may be made to fig. 1 and the description of fig. 1 will not be repeated.
Optionally, the light source is an infrared light source, and is used for emitting infrared light;
the light source comprises at least one infrared lamp or the light source comprises at least one vertical cavity surface emitting laser.
Optionally, the light source emits light at a wavelength of 940nm or 850nm.
Optionally, the light source is located at any of the following positions: the back of the backlight module of the screen, the chin position of the screen or the backlight light supplementing area of the screen. Reference is made to fig. 2A-2B.
Optionally, an antireflection film is plated on the lens. The embodiment of the application does not limit the material of the antireflection film.
The embodiment of the application provides an under-screen fingerprint acquisition device which is suitable for electronic equipment with a liquid crystal display screen.
The under-screen fingerprint acquisition device comprises a light source, an image sensor and a lens, wherein the light source is used for providing illumination for a finger above the liquid crystal display screen so as to generate fingerprint detection light on the finger; the lens and the image sensor are used for being arranged below the liquid crystal display screen, wherein the lens is used for converging fingerprint detection light passing through the liquid crystal display screen to the image sensor and performing fingerprint imaging on the image sensor so as to acquire fingerprint images of the finger; the image sensor is used for acquiring a first fingerprint image of the finger under the irradiation of the light source at a first exposure time, wherein the first fingerprint image is used for determining a second exposure time of the image sensor, and the second exposure time is used as a target exposure time for fingerprint imaging of the fingerprint sensor; and the image sensor is further used for acquiring a second fingerprint image of the finger according to the target exposure time.
In one possible embodiment, the light source comprises at least one vertical cavity surface emitting infrared laser for providing infrared light having a wavelength of 940nm to a finger over the liquid crystal display to generate fingerprint detection light, wherein the surface of the lens is formed with an antireflection film having an antireflection effect for infrared light having a wavelength of 940 nm.
In a possible implementation manner, the device for acquiring the fingerprint under the screen provided by the embodiment of the application further comprises a light filter formed between the lens and the fingerprint sensor, wherein the light filter is used for filtering interference light entering the fingerprint sensor, and a light-transmitting band of the light filter corresponds to a light-emitting band of the light source.
In addition, the embodiment of the application further provides a computer-readable storage medium, wherein computer-executable instructions are stored in the computer-readable storage medium, and when at least one processor of the user equipment executes the computer-executable instructions, the user equipment executes the various possible methods.
Among them, computer-readable media include computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A storage media may be any available media that can be accessed by a general purpose or special purpose computer. An exemplary storage medium is coupled to the processor such the processor can read information from, and write information to, the storage medium. In the alternative, the storage medium may be integral to the processor. The processor and the storage medium may reside in an ASIC. In addition, the ASIC may reside in a user device. The processor and the storage medium may reside as discrete components in a communication device.
Those of ordinary skill in the art will appreciate that: all or part of the steps for implementing the method embodiments described above may be performed by hardware associated with program instructions. The foregoing program may be stored in a computer readable storage medium. The program, when executed, performs steps including the method embodiments described above; and the aforementioned storage medium includes: various media that can store program code, such as ROM, RAM, magnetic or optical disks.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the application.
Claims (24)
1. An under-screen fingerprint acquisition method, comprising:
under the irradiation of a light source, a first fingerprint image of a user is acquired;
determining a target exposure time of the image sensor according to the pixel value of the first fingerprint image;
Controlling the exposure time of the image sensor to be the target exposure time;
collecting a second fingerprint image of the user under the target exposure time;
the determining the target exposure time of the image sensor according to the pixel value of the first fingerprint image comprises the following steps:
acquiring a first relation between a plurality of global average values and a plurality of exposure times, wherein the global average values are average values of all pixel values of a fingerprint image of the user;
and determining the target exposure time through the first relation and the global average value of the first fingerprint image, wherein the target exposure time is determined according to the exposure time of the image sensor when the first fingerprint image is acquired multiplied by the standard exposure time and divided by the corresponding exposure time of the global average value of the first fingerprint image in the first relation.
2. The method of claim 1, further comprising, prior to determining a target exposure time for an image sensor based on pixel values of the first fingerprint image:
determining whether the exposure time of the image sensor needs to be adjusted according to a preset strategy;
and if the exposure time of the image sensor needs to be adjusted, determining the target exposure time of the image sensor according to the pixel value of the first fingerprint image.
3. The method of claim 1, wherein obtaining a first relationship between the plurality of global averages and the plurality of exposure times comprises:
respectively acquiring fingerprint images at the plurality of exposure times;
determining global average values corresponding to the exposure times respectively through fingerprint images acquired at the exposure times respectively;
a first relationship between the plurality of exposure times and global averages corresponding to each of the plurality of exposure times is determined.
4. A method according to any one of claims 1-3, further comprising:
judging whether the second fingerprint image meets a saturation condition or not;
and if the second fingerprint image meets the saturation condition, prompting that the acquisition of the fingerprint image of the user fails.
5. The method as recited in claim 4, further comprising:
and if the second fingerprint image does not meet the saturation condition, identifying the second fingerprint image.
6. The method of claim 2, wherein the preset policy comprises:
if the number of the pixel values exceeding the preset threshold value in the pixel values of the first fingerprint image does not reach the preset number, the exposure time of the image sensor does not need to be adjusted;
If the number of pixel values exceeding the preset threshold value in the pixel values of the first fingerprint image reaches the preset number, the exposure time of the image sensor needs to be adjusted.
7. The method of claim 2, wherein the preset policy comprises:
if all the pixel values in the continuous area in the first fingerprint image are greater than the first pixel value and less than or equal to the second pixel value, the exposure time of the image sensor needs to be adjusted, the second pixel value is the maximum pixel value in the first fingerprint image, and the first pixel value is smaller than the second pixel value.
8. An under-screen fingerprint acquisition device, comprising:
the acquisition module is used for acquiring a first fingerprint image of a user under the irradiation of the light source;
a first determining module, configured to determine a target exposure time of an image sensor according to a pixel value of the first fingerprint image;
the control module is used for controlling the exposure time of the image sensor to be the target exposure time;
the acquisition module is further used for acquiring a second fingerprint image of the user under the target exposure time;
the first determining module includes:
The acquisition sub-module is used for acquiring a first relation between a plurality of global average values and a plurality of exposure times, wherein the global average values are average values of all pixel values of the fingerprint image of the user;
the determining submodule is used for determining the target exposure time through the first relation and the global average value of the first fingerprint image, and the target exposure time is determined according to the exposure time of the image sensor when the first fingerprint image is acquired multiplied by the standard exposure time and divided by the corresponding exposure time of the global average value of the first fingerprint image in the first relation.
9. The apparatus as recited in claim 8, further comprising:
the second determining module is used for determining whether the exposure time of the image sensor needs to be adjusted according to a preset strategy;
the first determining module is configured to determine, if the exposure time of the image sensor needs to be adjusted, a target exposure time of the image sensor according to the pixel value of the first fingerprint image.
10. The apparatus of claim 8, wherein the acquisition sub-module is specifically configured to:
respectively acquiring fingerprint images at the plurality of exposure times;
Determining global average values corresponding to the exposure times respectively through fingerprint images acquired at the exposure times respectively;
a first relationship between the plurality of exposure times and global averages corresponding to each of the plurality of exposure times is determined.
11. The apparatus according to any one of claims 8-10, further comprising:
the judging module is used for judging whether the second fingerprint image meets a saturation condition or not;
and the prompting module is used for prompting the user that the fingerprint image acquisition fails if the second fingerprint image meets the saturation condition.
12. The apparatus as recited in claim 11, further comprising:
and the identification module is used for identifying the second fingerprint image if the second fingerprint image does not meet the saturation condition.
13. The apparatus of claim 9, wherein the preset policy comprises:
if the number of the pixel values exceeding the preset threshold value in the pixel values of the first fingerprint image does not reach the preset number, the exposure time of the image sensor does not need to be adjusted;
if the number of pixel values exceeding the preset threshold value in the pixel values of the first fingerprint image reaches the preset number, the exposure time of the image sensor needs to be adjusted.
14. The apparatus of claim 9, wherein the preset policy comprises:
if all the pixel values in the continuous area in the first fingerprint image are greater than the first pixel value and less than or equal to the second pixel value, the exposure time of the image sensor needs to be adjusted, the second pixel value is the maximum pixel value in the first fingerprint image, and the first pixel value is smaller than the second pixel value.
15. An electronic device, comprising:
at least one processor; and
a memory communicatively coupled to the at least one processor; wherein the method comprises the steps of
The memory stores instructions executable by the at least one processor to enable the at least one processor to perform the method of any one of claims 1-7.
16. The electronic device of claim 15, further comprising: the fingerprint detection device comprises a light source, an image sensor, an optical filter and a lens, wherein the light source is connected with the at least one processor and used for providing illumination for collecting fingerprint images; the image sensor is connected with the at least one processor and is used for collecting fingerprint images; the optical filter is positioned above the image sensor and is used for filtering the light transmitted through the lens.
17. The electronic device of claim 16, wherein the light source is an infrared light source for emitting infrared light;
the light source comprises at least one infrared lamp or the light source comprises at least one vertical cavity surface emitting laser VCSEL.
18. The electronic device of claim 17, wherein the light source emits light at a wavelength of 940nm or 850nm.
19. The electronic device of claim 18, wherein the light source is located at any of:
the back of the backlight module of the screen, the chin position of the screen or the backlight light supplementing area of the screen.
20. The electronic device of claim 18, wherein the lens is coated with an anti-reflection film.
21. A non-transitory computer readable storage medium storing computer instructions for causing the computer to perform the method of any one of claims 1-7.
22. An under-screen fingerprint acquisition device suitable for an electronic device with a liquid crystal display screen, and is characterized by comprising a light source, an image sensor and a lens, wherein the light source is used for providing illumination for a finger above the liquid crystal display screen so as to generate fingerprint detection light on the finger; the lens and the image sensor are arranged below the liquid crystal display, wherein the lens is used for converging fingerprint detection light passing through the liquid crystal display to the image sensor and performing fingerprint imaging on the image sensor so as to acquire a fingerprint image of the finger; the image sensor is used for acquiring a first fingerprint image of the finger under the irradiation of the light source at a first exposure time, wherein the first fingerprint image is used for determining a second exposure time of the image sensor, the second exposure time is used as a target exposure time for fingerprint imaging of the fingerprint sensor, the target exposure time is determined according to the exposure time of the image sensor when the first fingerprint image is acquired multiplied by a standard exposure time and divided by the exposure time corresponding to a global average value of the first fingerprint image in a first relation, and the first relation is a relation between a plurality of global average values and a plurality of exposure times, and the global average value is an average value of all pixel values of the fingerprint image of a user; and the image sensor is further configured to acquire a second fingerprint image of the finger according to the target exposure time.
23. The under-screen fingerprint acquisition device according to claim 22, wherein the light source comprises at least one vertical cavity surface emitting infrared laser for providing infrared light having a wavelength of 940nm to a finger over the liquid crystal display screen to generate the fingerprint detection light, wherein a surface of the lens is formed with an antireflection film having an antireflection effect for infrared light having a wavelength of 940 nm.
24. The device of claim 23, further comprising a filter formed between the lens and the fingerprint sensor, the filter configured to filter out interfering light entering the fingerprint sensor, wherein a light-passing band of the filter corresponds to a light-emitting band of the light source.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2019/113247 WO2021077393A1 (en) | 2019-10-25 | 2019-10-25 | Below-screen fingerprint acquisition method and apparatus, electronic device, and storage medium |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110945526A CN110945526A (en) | 2020-03-31 |
| CN110945526B true CN110945526B (en) | 2023-10-24 |
Family
ID=69914001
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201980002471.7A Active CN110945526B (en) | 2019-10-25 | 2019-10-25 | Under-screen fingerprint acquisition method and device, electronic equipment and storage medium |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN110945526B (en) |
| WO (1) | WO2021077393A1 (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111611881B (en) * | 2020-04-30 | 2023-10-27 | 深圳阜时科技有限公司 | Biological feature collection device and electronic equipment |
| CN112668425B (en) * | 2020-12-18 | 2022-11-01 | 深圳市汇顶科技股份有限公司 | Fingerprint detection method, fingerprint sensor and electronic equipment |
| WO2022126656A1 (en) | 2020-12-18 | 2022-06-23 | 深圳市汇顶科技股份有限公司 | Fingerprint detection method, fingerprint sensor and electronic device |
| CN114863494A (en) * | 2021-01-20 | 2022-08-05 | 华为技术有限公司 | Screen brightness adjusting method and device and terminal equipment |
| CN112949600A (en) * | 2021-04-07 | 2021-06-11 | Oppo广东移动通信有限公司 | Method, device, terminal and storage medium for collecting fingerprint under screen |
| CN113180622A (en) * | 2021-05-07 | 2021-07-30 | 深圳市汇顶科技股份有限公司 | Biological information measuring method, apparatus, device, storage medium, and program product |
| WO2022246666A1 (en) * | 2021-05-25 | 2022-12-01 | 深圳市汇顶科技股份有限公司 | Biometric collection method and chip, and computer-readable storage medium |
| CN113361416B (en) * | 2021-06-08 | 2022-11-29 | 深圳市汇顶科技股份有限公司 | Method and device for collecting fingerprint image and electronic equipment |
| CN115620346B (en) * | 2021-09-30 | 2023-09-19 | 荣耀终端有限公司 | Under-screen fingerprint acquisition method and electronic equipment |
| CN114373196B (en) * | 2021-12-31 | 2023-09-19 | 天津极豪科技有限公司 | Effective acquisition area determination method, program product, storage medium and electronic device |
| CN115134492B (en) * | 2022-05-31 | 2024-03-19 | 北京极光智芯科技有限公司 | Image acquisition method, electronic device, and computer-readable medium |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8036431B1 (en) * | 1999-10-29 | 2011-10-11 | Identix Incorporated | Portable apparatus for identification verification |
| WO2016029346A1 (en) * | 2014-08-25 | 2016-03-03 | 华为技术有限公司 | Fingerprint extraction method and apparatus |
| WO2018023729A1 (en) * | 2016-08-05 | 2018-02-08 | 厦门中控智慧信息技术有限公司 | Fingerprint identification device and fingerprint identification method |
| CN107690653A (en) * | 2017-08-18 | 2018-02-13 | 深圳市汇顶科技股份有限公司 | Obtain the method, apparatus and terminal device of fingerprint image |
| CN109496311A (en) * | 2018-10-26 | 2019-03-19 | 深圳市汇顶科技股份有限公司 | Shield lower biometric devices and electronic equipment |
| EP3457392A1 (en) * | 2017-09-15 | 2019-03-20 | LG Display Co., Ltd. | Fingerprint sensing display apparatus |
| CN109740514A (en) * | 2018-12-29 | 2019-05-10 | 成都指灵瞳科技有限公司 | A kind of display screen optical finger print identification electronic device and method |
| CN110268418A (en) * | 2019-05-06 | 2019-09-20 | 深圳市汇顶科技股份有限公司 | The method, apparatus and electronic equipment of fingerprint detection |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6950539B2 (en) * | 1998-09-16 | 2005-09-27 | Digital Persona | Configurable multi-function touchpad device |
| CN109977857A (en) * | 2019-03-25 | 2019-07-05 | 钧安科技（深圳）有限公司 | It is a kind of to improve the filming control method for referring to hand vein recognition picture quality |
| CN109993120A (en) * | 2019-03-31 | 2019-07-09 | 联想(北京)有限公司 | A kind of information processing method and electronic equipment |
-
2019
- 2019-10-25 CN CN201980002471.7A patent/CN110945526B/en active Active
- 2019-10-25 WO PCT/CN2019/113247 patent/WO2021077393A1/en active Application Filing
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8036431B1 (en) * | 1999-10-29 | 2011-10-11 | Identix Incorporated | Portable apparatus for identification verification |
| WO2016029346A1 (en) * | 2014-08-25 | 2016-03-03 | 华为技术有限公司 | Fingerprint extraction method and apparatus |
| WO2018023729A1 (en) * | 2016-08-05 | 2018-02-08 | 厦门中控智慧信息技术有限公司 | Fingerprint identification device and fingerprint identification method |
| CN107690653A (en) * | 2017-08-18 | 2018-02-13 | 深圳市汇顶科技股份有限公司 | Obtain the method, apparatus and terminal device of fingerprint image |
| EP3457392A1 (en) * | 2017-09-15 | 2019-03-20 | LG Display Co., Ltd. | Fingerprint sensing display apparatus |
| CN109496311A (en) * | 2018-10-26 | 2019-03-19 | 深圳市汇顶科技股份有限公司 | Shield lower biometric devices and electronic equipment |
| CN109740514A (en) * | 2018-12-29 | 2019-05-10 | 成都指灵瞳科技有限公司 | A kind of display screen optical finger print identification electronic device and method |
| CN110268418A (en) * | 2019-05-06 | 2019-09-20 | 深圳市汇顶科技股份有限公司 | The method, apparatus and electronic equipment of fingerprint detection |
Non-Patent Citations (1)
| Title |
|---|
| 光电式指纹采集图像装置及其分类算法;宋榕;林喜荣;黄万锋;郭洪峰;;电视技术(第02期);85-87 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110945526A (en) | 2020-03-31 |
| WO2021077393A1 (en) | 2021-04-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110945526B (en) | Under-screen fingerprint acquisition method and device, electronic equipment and storage medium | |
| US11113552B2 (en) | Electronic device and method for displaying image for iris recognition in electronic device | |
| US11311195B2 (en) | Electronic device, and method for analyzing face information in electronic device | |
| US10705576B2 (en) | Electronic device including display and sensor | |
| US9967444B2 (en) | Apparatus and method for capturing image in electronic device | |
| CN110870072A (en) | Image sensor including light-shielding member for blocking interference between plurality of light-receiving sensors, and electronic device including the same | |
| CN108205374B (en) | Eyeball tracking module and method of video glasses and video glasses | |
| CN108280431B (en) | Face recognition processing method, face recognition processing device and intelligent terminal | |
| US10616474B2 (en) | Electronic device including iris recognition sensor and method of operating the same | |
| KR102266468B1 (en) | Method for a focus control and electronic device thereof | |
| KR102525126B1 (en) | Electronic device comprising iris camera | |
| KR102246762B1 (en) | Method for content adaptation based on ambient environment in electronic device and the electronic device thereof | |
| KR102359276B1 (en) | Method and apparatus for controlling white balance function of electronic device | |
| KR102547104B1 (en) | Electronic device and method for processing plural images | |
| KR102206877B1 (en) | Method and apparatus for displaying biometric information | |
| US20170263192A1 (en) | Automatic control of display brightness | |
| EP3287924B1 (en) | Electronic device and method for measuring heart rate based on infrared rays sensor using the same | |
| US20170123185A1 (en) | Lens assembly and electronic device with the same | |
| KR20180108214A (en) | Device and method for authenticating biometric data using a plural camera | |
| EP3255878B1 (en) | Electronic device and control method therefor | |
| KR102373457B1 (en) | Electronic device and method for controlling sensitivity of a sensor based on properties of window in electronic device | |
| US20180020142A1 (en) | Electronic device and method for controlling the same | |
| CN115479665A (en) | Ambient light detection method and electronic equipment | |
| CN112153300A (en) | Multi-view camera exposure method, device, equipment and medium | |
| KR20130025498A (en) | Mobile terminal and control method therof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |