CN106484113B - Screen wake-up apparatus and method - Google Patents
Screen wake-up apparatus and method Download PDFInfo
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- CN106484113B CN106484113B CN201610887737.9A CN201610887737A CN106484113B CN 106484113 B CN106484113 B CN 106484113B CN 201610887737 A CN201610887737 A CN 201610887737A CN 106484113 B CN106484113 B CN 106484113B
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/011—Arrangements for interaction with the human body, e.g. for user immersion in virtual reality
- G06F3/013—Eye tracking input arrangements
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
- G06F21/30—Authentication, i.e. establishing the identity or authorisation of security principals
- G06F21/31—User authentication
- G06F21/32—User authentication using biometric data, e.g. fingerprints, iris scans or voiceprints
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F9/00—Arrangements for program control, e.g. control units
- G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
- G06F9/44—Arrangements for executing specific programs
- G06F9/4401—Bootstrapping
- G06F9/4418—Suspend and resume; Hibernate and awake
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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
- G06V40/18—Eye characteristics, e.g. of the iris
- G06V40/19—Sensors therefor
Abstract
The invention discloses a screen awakening device and method, and belongs to the field of mobile terminals. The device comprises: an acquisition module for acquiring an eyeball image, the eyeball image comprising an image of an eyeball part of a human eye; the comparison module is used for comparing the eyeball image with a preset image, wherein the preset image is an image of an eyeball part shot by a user in advance; the driving module is used for waking up a screen when the similarity between the eyeball image and the preset image is greater than or equal to a preset value; and when the similarity between the eyeball image and a preset image is smaller than a preset value, not waking up the screen. According to the method and the device, the eyeball image is collected and compared with the preset image, when the similarity is larger than or equal to the preset value, the screen is awakened, manual operation of a user is not needed in the process, the problem that the manual operation process is complicated is solved, and the awakening operation can be completed only by the user himself because the preset image is the eyeball image shot by the user in advance, so that the safety degree is high.
Description
Technical Field
The invention relates to the field of mobile terminals, in particular to a screen awakening device and a screen awakening method.
Background
With the progress of science and technology, mobile terminals such as smart phones and tablet computers become necessary products for all people.
In order to ensure that the mobile terminal can effectively reduce power consumption, the conventional mobile terminal enters a dormant state when not in use. Most of the external devices of the mobile terminal, such as a display screen and a touch screen, are closed in the dormant state. When the user needs to use the mobile terminal, the mobile terminal can be awakened by adopting manual operation modes such as a key and the like. However, this wake-up method requires manual operation on the mobile terminal by the user, which is cumbersome and has low security (if the mobile terminal does not need authentication) since the manual operation such as pressing a key can be performed by anyone.
Disclosure of Invention
In order to solve the problems that the conventional screen awakening mode is complex and low in safety, the embodiment of the invention provides a screen awakening device and a screen awakening method. The technical scheme is as follows:
in a first aspect, an embodiment of the present invention provides a screen waking device, where the device includes:
an acquisition module for acquiring an eyeball image, the eyeball image comprising an image of an eyeball part of a human eye;
the comparison module is used for comparing the eyeball image with a preset image, wherein the preset image is an image of an eyeball part shot by a user in advance;
the driving module is used for waking up a screen when the similarity between the eyeball image and the preset image is greater than or equal to a preset value; when the similarity between the eyeball image and a preset image is smaller than a preset value, not waking up a screen;
the comparison module comprises: the filter is used for filtering the eyeball image acquired by the acquisition module; the comparison unit is used for comparing the eyeball image after filtering processing with the preset image;
the comparison unit includes: a memory for storing the preset image; the digital-to-analog conversion circuit is used for performing digital-to-analog conversion on the preset image and the filtered eyeball image to respectively generate a first analog signal and a second analog signal; the comparison circuit is used for carrying out differential amplification on the first analog signal and the second analog signal and outputting a voltage signal;
the processing subunit is configured to read the preset image and the filtered eyeball image respectively in a sequence from left to right line by line to obtain binary signals, input the binary signals into the digital-to-analog conversion circuit to perform digital-to-analog conversion, where the preset image and the eyeball image each include a plurality of pixel points distributed in rows and columns, and each pixel point is represented by a four-bit binary number; and determining the similarity between the eyeball image and the preset image according to the magnitude of the voltage signal output by the comparison circuit.
In one implementation manner of the embodiment of the present invention, the preset image is an image of an eyeball part extracted from an image of human eyes photographed while a user is looking on a screen.
In another implementation manner of the embodiment of the present invention, the preset image may include a plurality of preset images, and at least one of an included angle and a distance between a user sight line corresponding to any two preset images in the plurality of preset images and the screen display surface is different.
In another implementation manner of the embodiment of the present invention, the comparison module is configured to compare the eyeball image with the plurality of preset images in sequence until the similarity between the eyeball image and one preset image is greater than or equal to a preset value, or the comparison of all the preset images is completed.
In another implementation manner of the embodiment of the present invention, the preset value is 90% to 95%.
In another implementation manner of the embodiment of the invention, the acquisition module comprises a camera and a processor;
the processor is used for determining whether human eyes exist in the current picture according to the picture captured by the camera, controlling the camera to shoot the current picture to generate a human eye image when the human eyes exist in the current picture, and extracting an eyeball image from the human eye image.
In another implementation manner of the embodiment of the present invention, the obtaining module further includes a touch sensor, and the processor is further configured to obtain a signal generated by the touch sensor; and controlling the camera to work when the signal generated by the touch sensor is acquired.
In another implementation manner of the embodiment of the present invention, the driving module is configured to generate a control signal when a similarity between the eyeball image and a preset image is greater than or equal to a preset value, where the control signal is used to instruct the screen to light up;
and sending the control signal to a driving unit of a screen.
In another implementation manner of the embodiment of the present invention, the eyeball image and the preset image are both 3D images.
In a second aspect, an embodiment of the present invention further provides a method for waking up a screen, where the method includes:
acquiring an eyeball image, wherein the eyeball image comprises an image of an eyeball part of human eyes;
filtering the eyeball image;
respectively reading the preset image and the filtered eyeball image to obtain binary signals according to a sequence from left to right line by line, inputting the binary signals into the digital-to-analog conversion circuit for digital-to-analog conversion, and respectively generating a first analog signal and a second analog signal, wherein the preset image and the eyeball image respectively comprise a plurality of pixel points distributed in rows and columns, and each pixel point is represented by a four-digit binary number;
carrying out differential amplification on the first analog signal and the second analog signal to output a voltage signal;
determining the similarity between the eyeball image and the preset image according to the magnitude of the voltage signal output by the comparison circuit;
when the similarity between the eyeball image and the preset image is larger than or equal to a preset value, waking up a screen; and when the similarity between the eyeball image and a preset image is smaller than a preset value, not waking up the screen.
In one implementation manner of the embodiment of the present invention, the preset image is an image of an eyeball part extracted from an image of human eyes photographed while a user is looking on a screen.
In another implementation manner of the embodiment of the present invention, the preset image may include a plurality of preset images, and at least one of an included angle and a distance between a user sight line corresponding to any two preset images in the plurality of preset images and the screen display surface is different.
In another implementation manner of the embodiment of the present invention, the method further includes:
and comparing the eyeball image with the plurality of preset images in sequence until the similarity of the eyeball image and one preset image is greater than or equal to a preset value, or finishing the comparison of all the preset images.
In another implementation manner of the embodiment of the present invention, the preset value is 90% to 95%.
In another implementation manner of the embodiment of the present invention, the acquiring an eyeball image includes:
determining whether human eyes exist in the current picture according to the picture captured by the camera, controlling the camera to shoot the current picture to generate a human eye image when the human eyes exist in the current picture, and extracting an eyeball image from the human eye image.
In another implementation manner of the embodiment of the present invention, the acquiring an eyeball image further includes:
acquiring signals generated by a touch sensor;
and controlling the camera to work when the signal generated by the touch sensor is acquired.
In another implementation manner of the embodiment of the present invention, waking up a screen when the similarity between the eyeball image and a preset image is greater than or equal to a preset value includes:
when the similarity of the eyeball image and a preset image is larger than or equal to a preset value, generating a control signal, wherein the control signal is used for indicating the screen to be lightened;
and sending the control signal to a driving unit of a screen.
In another implementation manner of the embodiment of the present invention, the eyeball image and the preset image are both 3D images.
The technical scheme provided by the embodiment of the invention has the following beneficial effects:
according to the method and the device, the eyeball image is collected and compared with the preset image, when the similarity is larger than or equal to the preset value, the screen is awakened, manual operation of a user is not needed in the process, the problem that the manual operation process is complicated is solved, and the awakening operation can be completed only by the user himself because the preset image is the eyeball image shot by the user in advance, so that the safety degree is high.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a screen wake-up apparatus according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of another screen waking device according to an embodiment of the present invention;
FIG. 3A is a schematic structural diagram of a comparison unit provided in an embodiment of the present invention;
FIG. 3B is a circuit diagram of a comparison circuit provided by an embodiment of the present invention;
fig. 4 is a flowchart of a method for waking up a screen according to an embodiment of the present invention;
fig. 5 is a flowchart of another screen wake-up method according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of a screen wakeup device according to an embodiment of the present invention, and referring to fig. 1, the device includes:
an acquiring module 101 is configured to acquire an eyeball image, where the eyeball image includes an image of an eyeball part of a human eye.
The comparison module 102 is configured to compare the eyeball image with a preset image, where the preset image is an image of an eyeball part photographed by a user in advance.
The driving module 103 is used for waking up the screen when the similarity between the eyeball image and the preset image is greater than or equal to a preset value; and when the similarity between the eyeball image and the preset image is smaller than the preset value, not waking up the screen.
According to the method and the device, the eyeball image is collected and compared with the preset image, when the similarity is larger than or equal to the preset value, the screen is awakened, manual operation of a user is not needed in the process, the problem that the manual operation process is complicated is solved, and the awakening operation can be completed only by the user himself because the preset image is the eyeball image shot by the user in advance, so that the safety degree is high.
Fig. 2 is a schematic structural diagram of another screen wakeup device provided in an embodiment of the present invention, and referring to fig. 2, the device includes:
an acquiring module 201 is configured to acquire an eyeball image, where the eyeball image includes an image of an eyeball part of a human eye.
The comparison module 202 is configured to compare the eyeball image with a preset image, where the preset image is an image of an eyeball part photographed by a user in advance.
The driving module 203 is configured to wake up the screen when the similarity between the eyeball image and the preset image is greater than or equal to a preset value; and when the similarity between the eyeball image and the preset image is smaller than the preset value, not waking up the screen.
The eye image is typically an image of a portion of the interior of the human eye orbit. The screen is awakened by comparing eyeball images, on one hand, because the eyeballs comprise tissues such as irises and the like, the eyeball images can be used for identity authentication of the user, and on the other hand, when the user uses the mobile terminal, the sight line of the user is generally aligned to the screen of the mobile terminal, so that the eyeball images can be used for verifying whether the sight line of the user is on the screen.
In the implementation process, the preset image can be shot when the sight of the user is on the screen, so that the requirement of verification on the sight of the user is met. Specifically, the preset image is an image of an eyeball part extracted from an image of human eyes taken while the user is looking on the screen. Therefore, the screen can be awakened only when the user stares at the screen, and the screen is prevented from being lightened when the sight of the user is not on the screen.
Further, the preset images may include a plurality of images, and at least one of an included angle and a distance between a user sight line corresponding to any two of the plurality of preset images and the screen display surface is different.
When a user watches the screen at different angles or distances, the eyeball of the user can be changed, so that the photographed eyeball images of the user have differences, and in order to wake up the screen at different watching distances and angles, preset images at different included angles and distances need to be stored. In implementation, the obtaining module 201 may automatically capture a preset image in daily life of the user. For example, the obtaining module 201 is configured to shoot the eyes of the user to obtain a preset picture when the user manually wakes up or unlocks the mobile terminal; the obtaining module 201 obtains preset images with different included angles and distances by shooting for multiple times. Of course, the shooting of the preset image can also be manually completed by the user, for example, the user can fix the distance between the eyeballs and the screen, then change different included angles to shoot, and then gradually adjust the distance to complete the shooting of the preset image with different included angles and distances. For example, the shooting distances are divided into 10cm, 20cm, 30cm and 50cm, in the case of 10cm, shooting is performed according to three angles of the screen that eyes are right to the screen, the screen is obliquely watched from the upper side to the lower side by the eyes (for example, the sight line and the screen form an angle of 45 degrees), and the screen is obliquely watched from the lower side by the eyes, and then shooting is performed according to the same way for other distances, so that 12 preset images are obtained. Of course, in the embodiment of the present invention, more distances and angles may be set to take the preset image, or a plurality of pictures may be taken at each distance and angle.
When comparing, the comparison module 202 is configured to compare the eyeball image with a plurality of preset images in sequence until the similarity between the eyeball image and one preset image is greater than or equal to a preset value, or the comparison of all the preset images is completed.
In the embodiment of the present invention, the preset value may be 90% to 95%. The preset value is set to be 90% -95%, and it is guaranteed that only the user himself can wake up the screen.
In this embodiment of the present invention, the obtaining module 201 may include: a camera 2011 and a processor 2012;
the processor 2012 is configured to determine whether human eyes exist in the current picture according to the picture captured by the camera 2011, and when human eyes exist in the current picture, control the camera 2011 to capture the current picture to generate a human eye image, and extract an eyeball image from the human eye image. The processor controls the camera to shoot when capturing human eyes, so that the phenomenon that the shot images are too many is avoided.
In implementation, the processor 2012 may obtain a plurality of region images from the eye images in a traversal manner, and then sequentially classify the plurality of region images by using a classifier, so as to determine the region images including the eyeballs, further determine the approximate positions of the eyeballs, and finally extract the eyeball images from the eye images by using an edge extraction technique. Of course, the above-mentioned eye image extraction method is only an example, and other methods may also be adopted to extract the eye image in the embodiment of the present invention, which are not described herein again.
Wherein, camera 2011 can be the leading camera of mobile terminal, and camera 2011 and treater 2012 combine, realize the tracking and the detection of people's eye, and its tracking detection scope is 110, and the shooting angle that also says that the camera can reach 110 to easily shoot people's eye more.
The processor 2012 may be an MCU (micro controller Unit, Chinese).
Further, the obtaining module may further include a touch sensor 2013, and the processor is further configured to obtain a signal generated by the touch sensor 2013; when the signal generated by the touch sensor 2013 is acquired, the camera 2011 is controlled to operate. When the device is used by people, pictures are shot, and power consumption is saved.
In an embodiment of the present invention, the comparing module 202 may include:
the filter 2021 is configured to perform filtering processing on the eyeball image acquired by the acquisition module; a comparison unit 2022, configured to compare the filtered eyeball image with a preset image.
The eyeball image acquired by the acquisition module 201 is doped with redundant signals due to the influence of noise and other factors. In order to obtain more accurate eyeball information, the signal acquired by the acquisition module 201 needs to be filtered, so a filter is needed. The filter generally includes two ports, an input port and an output port, and an eye signal (eye image) is input through the input port and filtered to output a signal with a specific frequency. The filter may be a band-pass filter, and is configured to filter low-frequency and high-frequency noise first, then filter the processed signal according to a frequency band of the lossless eyeball signal, only allow the signal of the frequency band to pass smoothly, while the signals of the other frequencies are greatly suppressed, and finally output a signal that is an eyeball signal with less noise doping, so as to improve subsequent contrast accuracy. In addition, when filtering, the eyeball image may be converted into a binary signal before filtering.
Referring to fig. 3A, the comparison unit 2022 may include:
a memory 2221 for storing preset images. The digital-to-analog conversion circuit 2222 is configured to perform digital-to-analog conversion on the preset image and the filtered eyeball image, and generate a first analog signal and a second analog signal, respectively. The comparison circuit 2223 is configured to differentially amplify the first analog signal and the second analog signal, and output a voltage signal. The processing subunit 2224 is configured to determine a similarity between the eyeball image and the preset image according to the magnitude of the voltage signal output by the comparison circuit. The comparison unit 2022 realizes signal comparison by differential amplification, determines similarity according to the voltage signal output by comparison, and has a simple implementation manner.
The digital-to-analog conversion circuit 2222 converts the input digital signal (preset image, eyeball image) into an analog signal. In order to improve the accuracy of the output analog signal, a high-accuracy digital-to-analog conversion circuit may be selected. For an image, the image comprises a plurality of pixel points distributed in rows and columns, and each pixel point is represented by a four-digit binary number. When performing digital-to-analog conversion, the processing subunit 2224 reads a preset image or an eyeball image to obtain a binary signal (which may be performed in a row-by-row order from left to right), and then inputs the binary signal into the digital-to-analog conversion circuit 2222. After obtaining the binary signal of the eyeball image, the processing subunit 2224 may also output the binary signal to the filter 2021 for filtering, and then input the filtered binary signal to the digital-to-analog conversion circuit 2222. The digital-to-analog conversion circuit 2222 converts the binary signal into a voltage value, thereby obtaining an analog signal corresponding to an image.
The Memory 2221 may include an EEPROM (english: Electrically Erasable programmable read-Only Memory) for storing a preset image. Memory 2221 may also include latches for buffering the eyeball image before signal comparison.
The comparison circuit 2223 may be a two-stage open-loop comparator, thereby achieving high-precision, low-delay comparison.
Specifically, referring to fig. 3B, the comparison circuit 2223 includes M1-M77 MOS (Metal oxide semiconductor, chinese) transistors, where M1, M2, M5, and M7 are N-type MOS transistors, and M3, M4, and M6 are P-type MOS transistors. As shown, the gate of the MOS transistor M1 is connected to the first input terminal Vin-, the source of M1 is connected to the source of M2, and the drain of M1 is connected to the drain of M3; the gate of the M2 is connected with the second input terminal Vin +, and the drain of the M2 is connected with the drain of the M4; the gate of M3 is connected with the gate of M4, the gate of M3 is also connected with the drain of M3, and the source of M3 is connected with the source of M4; the grid electrode of the M5 is connected with a bias voltage end Vbias, the source electrode of the M5 is connected with the source electrode of the M7, and the drain electrode of the M5 is connected with the source electrode of the M1; the gate of M6 is connected with the drain of M4, the source of M6 is connected with the source of M4, and the drain of M6 is connected with the output end Vout; the gate of M7 is connected to the bias voltage terminal Vbias, and the drain of M7 is connected to the output terminal Vout. The source of M3 is connected to a power supply Vdd, and the source of M5 is connected to a power supply Vss. The first analog signal and the second analog signal are respectively input to the comparison circuit 2223 through the first input terminal and the second input terminal.
The processing subunit 2224 may be implemented by an MCU, and may be the same MCU as the processor 2012.
In the embodiment of the present invention, the driving module 203 may be specifically configured to generate a control signal when the similarity between the eyeball image and the preset image is greater than or equal to a preset value, where the control signal is used to instruct the screen to light up; and a driving unit for transmitting the control signal to the screen. And controlling a screen driving unit through the control signal to realize screen awakening.
In the embodiment of the invention, the eyeball image and the preset image can be 3D images. And 3D images are adopted, so that the contrast precision is improved.
Further, after the completion of the screen wake-up, the mobile terminal may perform an unlocking process. Of course, in an implementation manner, the mobile terminal may also be directly unlocked after the completion of the screen wake-up, and no additional unlocking process is performed.
According to the method and the device, the eyeball image is collected and compared with the preset image, when the similarity is larger than or equal to the preset value, the screen is awakened, manual operation of a user is not needed in the process, the problem that the manual operation process is complicated is solved, and the awakening operation can be completed only by the user himself because the preset image is the eyeball image shot by the user in advance, so that the safety degree is high.
Fig. 4 is a flowchart of a method for waking up a screen according to an embodiment of the present invention, and referring to fig. 4, the method includes:
step 301: an eye image is acquired, the eye image comprising an image of an eye portion of a human eye.
Step 302: comparing the eyeball image with a preset image, wherein the preset image is an image of the eyeball part shot by a user in advance.
Step 303: when the similarity between the eyeball image and the preset image is larger than or equal to the preset value, awakening the screen; and when the similarity between the eyeball image and the preset image is smaller than the preset value, not waking up the screen.
According to the method and the device, the eyeball image is collected and compared with the preset image, when the similarity is larger than or equal to the preset value, the screen is awakened, manual operation of a user is not needed in the process, the problem that the manual operation process is complicated is solved, and the awakening operation can be completed only by the user himself because the preset image is the eyeball image shot by the user in advance, so that the safety degree is high.
Fig. 5 is a flowchart of another screen wakeup method according to an embodiment of the present invention, and referring to fig. 5, the method includes:
step 401: and determining whether human eyes exist in the current picture according to the picture captured by the camera.
Prior to step 401, the method may further comprise: acquiring signals generated by a touch sensor; when the signals generated by the touch sensor are acquired, the camera is controlled to work so as to capture pictures. When the device is used by people, pictures are shot, and power consumption is saved.
Step 402: when eyes exist in the current picture, the camera is controlled to shoot the current picture to generate eye images, and eyeball images are extracted from the eye images.
In steps 401 and 402, the processor controls the camera to shoot when capturing human eyes, so as to avoid excessive shot images.
Step 403: and carrying out filtering processing on the obtained eyeball image.
The eyeball image is subjected to denoising processing, so that the most real eyeball image is obtained, and the follow-up contrast precision is improved.
Step 404: and comparing the eyeball image after the filtering processing with a preset image.
The preset image is an image of an eyeball part extracted from an image of human eyes photographed while a user is looking on a screen. Therefore, the screen can be awakened only when the user stares at the screen, and the screen is prevented from being lightened when the sight of the user is not on the screen.
Further, the preset images may include a plurality of images, and at least one of an included angle and a distance between a user sight line corresponding to any two of the plurality of preset images and the screen display surface is different.
In practice, step 404 may include: compare eyeball image and preset image, include:
comparing the eyeball image with a plurality of preset images in sequence until the similarity between the eyeball image and one preset image is greater than or equal to a preset value, or finishing the comparison of all the preset images.
The comparison process between the eyeball image and each preset image may include:
firstly, performing digital-to-analog conversion on a preset image and an eyeball image subjected to filtering processing to respectively generate a first analog signal and a second analog signal.
And step two, performing differential amplification on the first analog signal and the second analog signal, and outputting a voltage signal.
And thirdly, determining the similarity between the eyeball image and a preset image according to the magnitude of the output voltage signal.
In the third step, the correspondence between the magnitude of the output voltage signal and the similarity between the eyeball image and the preset image may be set in advance, and after the magnitude of the output voltage signal is determined, the similarity between the eyeball image and the preset image may be determined according to the correspondence.
The signal comparison is realized through differential amplification in the steps, the similarity is determined according to the voltage signals output by comparison, and the implementation mode is simple.
Step 405: when the similarity between the eyeball image and the preset image is larger than or equal to the preset value, awakening the screen; and when the similarity between the eyeball image and the preset image is smaller than the preset value, not waking up the screen.
In the embodiment of the present invention, the preset value may be 90% to 95%. The preset value is set to be 90% -95%, and it is guaranteed that only the user himself can wake up the screen.
In practice, step 405 may include:
when the similarity between the eyeball image and the preset image is greater than or equal to a preset value, generating a control signal, wherein the control signal is used for indicating the screen to be lightened; and a driving unit for transmitting the control signal to the screen. And controlling a screen driving unit through the control signal to realize screen awakening.
In the embodiment of the invention, the eyeball image and the preset image can be 3D images. And 3D images are adopted, so that the contrast precision is improved.
According to the method and the device, the eyeball image is collected and compared with the preset image, when the similarity is larger than or equal to the preset value, the screen is awakened, manual operation of a user is not needed in the process, the problem that the manual operation process is complicated is solved, and the awakening operation can be completed only by the user himself because the preset image is the eyeball image shot by the user in advance, so that the safety degree is high.
It will be understood by those skilled in the art that all or part of the steps for implementing the above embodiments may be implemented by hardware, or may be implemented by a program instructing relevant hardware, where the program may be stored in a computer-readable storage medium, and the above-mentioned storage medium may be a read-only memory, a magnetic disk or an optical disk, etc.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. A screen wake-up device, the device comprising:
an acquisition module for acquiring an eyeball image, the eyeball image comprising an image of an eyeball part of a human eye;
the comparison module is used for comparing the eyeball image with a preset image, wherein the preset image is an image of an eyeball part shot by a user in advance;
the driving module is used for waking up a screen when the similarity between the eyeball image and the preset image is greater than or equal to a preset value; when the similarity between the eyeball image and a preset image is smaller than a preset value, not waking up a screen;
the comparison module comprises: the filter is used for filtering the eyeball image acquired by the acquisition module; the comparison unit is used for comparing the eyeball image after filtering processing with the preset image;
the comparison unit includes: a memory for storing the preset image; the digital-to-analog conversion circuit is used for performing digital-to-analog conversion on the preset image and the filtered eyeball image to respectively generate a first analog signal and a second analog signal; the comparison circuit is used for carrying out differential amplification on the first analog signal and the second analog signal and outputting a voltage signal;
the processing subunit is configured to read the preset image and the filtered eyeball image respectively in a sequence from left to right line by line to obtain binary signals, input the binary signals into the digital-to-analog conversion circuit to perform digital-to-analog conversion, where the preset image and the eyeball image each include a plurality of pixel points distributed in rows and columns, and each pixel point is represented by a four-bit binary number; and determining the similarity between the eyeball image and the preset image according to the magnitude of the voltage signal output by the comparison circuit.
2. The apparatus of claim 1, wherein the preset image is an image of an eyeball part extracted from an image of human eyes taken while a user is looking on a screen.
3. The device according to claim 2, wherein the preset image comprises a plurality of preset images, and at least one of an included angle and a distance between a user sight line corresponding to any two preset images in the plurality of preset images and the screen display surface is different.
4. The apparatus according to claim 3, wherein the comparing module is configured to compare the eyeball image with the plurality of preset images in sequence until a similarity between the eyeball image and one preset image is greater than or equal to a preset value, or the comparison between all preset images is completed.
5. The apparatus of any one of claims 1 to 4, wherein the obtaining module comprises: a camera and a processor;
the processor is used for determining whether human eyes exist in the current picture according to the picture captured by the camera, controlling the camera to shoot the current picture to generate a human eye image when the human eyes exist in the current picture, and extracting an eyeball image from the human eye image.
6. A method for waking up a screen, the method comprising:
acquiring an eyeball image, wherein the eyeball image comprises an image of an eyeball part of human eyes;
filtering the eyeball image;
respectively reading a preset image and the eyeball image after filtering processing according to a sequence from left to right line by line to obtain binary signals, inputting the binary signals into a digital-to-analog conversion circuit for digital-to-analog conversion, and respectively generating a first analog signal and a second analog signal, wherein the preset image and the eyeball image respectively comprise a plurality of pixel points distributed in rows and columns, and each pixel point is represented by a four-digit binary number;
carrying out differential amplification on the first analog signal and the second analog signal to output a voltage signal;
determining the similarity between the eyeball image and the preset image according to the magnitude of the voltage signal output by the comparison circuit;
when the similarity between the eyeball image and the preset image is larger than or equal to a preset value, waking up a screen; and when the similarity between the eyeball image and a preset image is smaller than a preset value, not waking up the screen.
7. The method according to claim 6, wherein the preset image is an image of an eyeball part extracted from an image of human eyes taken while a user is looking on a screen.
8. The method according to claim 7, wherein the preset image comprises a plurality of preset images, and at least one of an included angle and a distance between a user sight line corresponding to any two preset images in the plurality of preset images and the screen display surface is different.
9. The method of claim 8, further comprising:
and comparing the eyeball image with the plurality of preset images in sequence until the similarity of the eyeball image and one preset image is greater than or equal to a preset value, or finishing the comparison of all the preset images.
10. The method according to any one of claims 6 to 9, wherein the acquiring an eye image comprises:
determining whether human eyes exist in the current picture according to the picture captured by the camera, controlling the camera to shoot the current picture to generate a human eye image when the human eyes exist in the current picture, and extracting an eyeball image from the human eye image.
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| CN113032017B (en) * | 2019-12-25 | 2024-02-02 | 大众问问(北京)信息科技有限公司 | Equipment awakening method and device and electronic equipment |
| CN113626778B (en) * | 2020-05-08 | 2024-04-02 | 百度在线网络技术（北京）有限公司 | Method, apparatus, electronic device and computer storage medium for waking up device |
| CN111796874A (en) * | 2020-06-28 | 2020-10-20 | 北京百度网讯科技有限公司 | Equipment awakening method and device, computer equipment and storage medium |
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| CN105825102A (en) * | 2015-01-06 | 2016-08-03 | 中兴通讯股份有限公司 | Terminal unlocking method and apparatus based on eye-print identification |
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