CN111803022A - Vision detection method, detection device, terminal equipment and readable storage medium - Google Patents

Abstract

The present application is applicable to the field of detection technology, and provides a vision detection method, a detection device, a terminal device and a readable storage medium. The method includes: when a vision detection instruction is detected, acquiring target identity information according to a preset method; acquiring the target The historical vision detection value corresponding to the identity information, determine the level of the optotype to be displayed and display the optotype corresponding to the level according to the historical vision detection value; obtain the optotype feedback information, and determine the target vision detection value based on the optotype feedback information and the optotype information . The technical solution of the present application can solve the problems that the visual acuity detection method is relatively troublesome and the efficiency is relatively low.

Description

Vision detection method, detection device, terminal device and readable storage medium

technical field

The present application belongs to the field of detection, and in particular, relates to a vision detection method, a detection device, a terminal device and a readable storage medium.

Background technique

With the development of science and technology, electronic products are more and more popular among primary and secondary school students. However, the long-term use of electronic products and unhealthy eye habits have caused a sharp decline in the eyesight of primary and secondary school students, leading to myopia in primary and secondary school students. Therefore, it is necessary to test the eyesight of primary and secondary school students on a regular basis to prevent myopia in primary and secondary school students.

At present, the school usually organizes doctors to come to the school to test students' eyesight on a regular basis. However, the workload of visual inspection by doctors is relatively large, and the efficiency is relatively low. In addition, it is necessary to use the doctor to instruct the optotype and record the test results, which is troublesome.

Therefore, the current vision detection method is troublesome and inefficient.

SUMMARY OF THE INVENTION

The embodiments of the present application provide a vision detection method, a detection device, a terminal device, and a readable storage medium, which can solve the problems that the vision detection method is troublesome and inefficient.

In a first aspect, an embodiment of the present application provides a vision detection method, including:

When the vision detection instruction is detected, obtain the target identity information of the vision detection user according to a preset method;

Obtain the historical vision detection value corresponding to the above-mentioned target identity information, determine the level of the optotype to be displayed according to the above-mentioned historical vision detection value, and display the optotype corresponding to the above-mentioned level;

Obtain optotype feedback information, determine target vision detection value based on the above-mentioned optotype feedback information and the above-mentioned optotype information, wherein, the above-mentioned optotype feedback information is used to represent the recognition result of the above-mentioned vision detection user based on the feedback of the opening of the optotype, the above-mentioned optotype feedback information. The information of the optotype includes the opening orientation information corresponding to the optotype and the visual acuity value information corresponding to the optotype.

In a second aspect, an embodiment of the present application provides a vision detection device, including:

The vision detection instruction detection module is used to obtain the target identity information of the vision detection user according to a preset method when the vision detection instruction is detected;

An optotype display module, configured to obtain the historical vision detection value corresponding to the above-mentioned target identity information, determine the level of the optotype to be displayed according to the above-mentioned historical vision detection value, and display the optotype corresponding to the above-mentioned level;

The target vision detection value determination module is used to obtain the optotype feedback information, and determine the target vision detection value based on the above-mentioned optotype feedback information and the above-mentioned optotype information, wherein the above-mentioned optotype feedback information is used to indicate that the above-mentioned vision detection user is based on the above-mentioned vision. The recognition result of the opening orientation feedback of the target, the information of the optotype includes the opening orientation information corresponding to the optotype and the visual acuity value information corresponding to the optotype.

In a third aspect, an embodiment of the present application provides a terminal device, including a memory, a processor, and a computer program stored in the memory and running on the processor. When the processor executes the computer program, the above-mentioned first The steps of the method in one aspect.

In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, where the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the method described in the first aspect above are implemented.

In a fifth aspect, an embodiment of the present application provides a computer program product that, when the computer program product runs on a terminal device, enables the terminal device to execute the vision detection method described in any one of the first aspects above.

It can be understood that, for the beneficial effects of the second aspect to the fifth aspect, reference may be made to the relevant description in the first aspect, which is not repeated here.

The beneficial effects that the embodiments of the present application have compared with the prior art are:

As can be seen from the above, the present application provides a vision detection method. First, when a vision detection instruction is detected, target identity information of a vision detection user is acquired according to a preset method. Then, the historical vision detection value corresponding to the target identity information is obtained, the level of the optotype displayed for the first time is determined according to the historical vision detection value, and the optotype corresponding to the level is displayed. Finally, the optotype feedback information is obtained, and the target vision detection value is determined based on the optotype feedback information and the optotype information, wherein the optotype feedback information is used to indicate the recognition result of the vision detection user based on the feedback of the opening orientation of the optotype, and the optotype information includes the optotype. The opening orientation information corresponding to the marker and the visual acuity value information corresponding to the optotype. That is, in the present application, by automatically displaying the optotype, the user can perform visual inspection independently, which is simple and convenient and has high efficiency. And in this application, the level of the optotype to be displayed is determined according to the historical vision detection value of the vision detection user, so that the vision detection can be started at the optotype near the optotype corresponding to the vision value of the vision detection user, thereby reducing the time for vision detection. , to improve the efficiency of vision detection.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present application more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only for the present application. In some embodiments, for those of ordinary skill in the art, other drawings can also be obtained according to these drawings without any creative effort.

1 is a schematic flowchart of a vision detection method provided by an embodiment of the present application;

2 is a schematic diagram of a corresponding relationship between a test distance and a vision correction value provided by an embodiment of the present application;

3 is a schematic diagram of a reference provided by an embodiment of the present application;

4 is a schematic diagram of a method for judging the type of test eyes provided by an embodiment of the present application;

5 is a schematic diagram of a method for judging an eye occlusion state provided by an embodiment of the present application;

6 is a schematic structural diagram of a vision detection device provided by an embodiment of the present application;

FIG. 7 is a schematic structural diagram of a terminal device provided by an embodiment of the present application.

Detailed ways

In the following description, for the purpose of illustration rather than limitation, specific details such as a specific system structure and technology are set forth in order to provide a thorough understanding of the embodiments of the present application. However, it will be apparent to those skilled in the art that the present application may be practiced in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present application with unnecessary detail.

It is to be understood that, when used in this specification and the appended claims, the term "comprising" indicates the presence of the described feature, integer, step, operation, element and/or component, but does not exclude one or more other The presence or addition of features, integers, steps, operations, elements, components and/or sets thereof.

It will also be understood that, as used in this specification and the appended claims, the term "and/or" refers to and including any and all possible combinations of one or more of the associated listed items.

As used in the specification of this application and the appended claims, the term "if" may be contextually interpreted as "when" or "once" or "in response to determining" or "in response to detecting ". Similarly, the phrases "if it is determined" or "if the [described condition or event] is detected" may be interpreted, depending on the context, to mean "once it is determined" or "in response to the determination" or "once the [described condition or event] is detected. ]" or "in response to detection of the [described condition or event]".

In addition, in the description of the specification of the present application and the appended claims, the terms "first", "second", "third", etc. are only used to distinguish the description, and should not be construed as indicating or implying relative importance.

References in this specification to "one embodiment" or "some embodiments" and the like mean that a particular feature, structure or characteristic described in connection with the embodiment is included in one or more embodiments of the present application. Thus, appearances of the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in other embodiments," etc. in various places in this specification are not necessarily All refer to the same embodiment, but mean "one or more but not all embodiments" unless specifically emphasized otherwise. The terms "including", "including", "having" and their variants mean "including but not limited to" unless specifically emphasized otherwise.

In order to illustrate the technical solutions described in the present application, the following specific embodiments are used for description.

Example 1

The following describes a vision detection method provided in Embodiment 1 of the present application, please refer to FIG. 1 , the method includes:

Step S101, when a vision detection instruction is detected, acquire target identity information of a vision detection user according to a preset method.

In step S101, when the vision detection user wants to perform vision detection, the vision detection user can make the vision detection device generate a vision detection instruction by clicking the detection button on the vision detection device; The method enables the vision detection device to generate the vision detection instruction. The generation method of the vision detection instruction can be selected according to the actual situation, which is not specifically limited in this application. After detecting the vision detection instruction, the vision detection device obtains the target identity information of the vision detection user according to a preset method.

In some embodiments, the preset manner of acquiring the target identity information includes: recognizing the face image of the vision detection user, collecting fingerprint information of the vision detection user, and collecting at least the identity card information of the vision detection user A sort of.

In this embodiment, the target identity information can be obtained by performing face recognition on the face image collected by the camera, or by collecting the fingerprint information of the vision detection user, or by collecting the vision detection user's identity card information is obtained. It should be understood that if the vision detection user is a student, the target identity information can also be obtained by collecting campus card information. In this application, the acquisition method of the target identity information can be selected according to the actual situation, which is not specifically limited in this application.

It should be noted that, when the target identity information is obtained by performing face recognition on the image collected by the camera, if multiple faces are recognized, the non-detecting user is prompted to leave the shooting range. At the same time, the vision detection device can periodically collect images through the camera, and perform face recognition on the periodically collected images. When only one face is identified, the historical vision detection value corresponding to the target identity information is obtained.

In other embodiments, acquiring the historical vision detection value corresponding to the target identity information includes: matching the target identity information with the identity information in the preset identity information database; If the identity information matches, the historical vision detection value corresponding to the target identity information is obtained.

In this embodiment, the identity verification of the vision detection user can be performed. That is, the target identity information is matched with the identity information in the preset identity information database. If there is identity information matching the target identity information in the preset identity information database, the verification is passed, and then the historical vision detection value corresponding to the target identity information is obtained. .

It should be understood that the identity information in the preset identity information database may be generated after the user's registration, or may be generated after the school administrator uniformly inputs the student's identity information. The generation method of the identity information in the preset identity information database can be set according to the actual situation, which is not specifically limited in this application.

In still other embodiments, if the eye shield is arranged on the vision detection device, when the vision detection user takes the eye shield from the vision detection device, the identity of the vision detection user also needs to be verified. If the authentication is passed, the vision test user can remove the eye shield. After the vision detection user takes out the eye shield, when the target identity information is obtained according to the preset method, the identity verification of the vision detection user can also be performed again, so as to confirm the identity of the vision detection user and prevent the removal of the eye shield. The identity of the user is inconsistent with the identity of the vision detection user. It should be noted that the methods of authentication before and after can be the same or different. The user can choose according to the actual situation, which is not specifically limited in this application.

Step S102: Obtain the historical vision detection value corresponding to the target identity information, determine the level of the optotype to be displayed according to the historical vision detection value, and display the optotype corresponding to the level.

In step S102, the to-be-displayed optotype refers to the optotype displayed when each vision testing user performs vision testing. When determining the level of the optotype to be displayed according to the historical vision detection value and displaying the optotype corresponding to the level, the level of the optotype displayed for the first time may be determined according to the historical vision detection value. The optotype displayed for the first time refers to the optotype displayed when the user of the vision test just starts to perform the vision test. The visual indicator refers to the preset detection pattern. The specific shape of the optotype can be set according to the actual situation. For example, the optotype may be the letter E on the international standard vision chart, or the optotype may also be a C-shaped ring on the blue ring vision chart. After obtaining the target identity information, obtain the historical vision detection value corresponding to the target identity information, and then determine the level of the optotype displayed for the first time according to the historical vision detection value and display the optotype corresponding to the level.

In some embodiments, if the target identity information has no corresponding historical vision detection value, the level of the optotype displayed for the first time is determined according to the preset level, and the optotype corresponding to the level is displayed.

In this embodiment, if the target identity information has no corresponding historical vision detection value, the level of the optotype displayed for the first time is determined according to the preset level, and the optotype corresponding to the level is displayed.

In still other embodiments, before the vision detection device displays the optotype, the vision detection device further performs a detection area prompting operation. Because when the distance between the vision detection user and the terminal device is too close or too far, the accuracy of the vision detection result will be affected. Therefore, before the vision detection device displays the optotype, the vision detection device may perform a detection area prompt operation to instruct the vision detection user to stand in the detection area.

After the vision detection user stands in the detection area, the vision detection user may send confirmation feedback information to the vision detection device in the first preset manner, informing the vision detection device that the vision detection user has stood in the detection area. The first preset manner may be that the vision detection user clicks a button on the eye shader, or may be the vision detection user's feedback through voice. The first preset mode for sending the confirmation feedback information can be selected according to the actual situation, which is not specifically limited in this application. Alternatively, the vision detection device periodically acquires an image of the vision detection user through a camera, and then judges whether the vision detection user is standing in the detection area through the image. When it is detected that the vision detection user is standing in the detection area, the optotype is displayed.

In other embodiments, before the vision detection device displays the optotype, the vision detection device may perform an eye covering prompt operation to prompt the vision detection user to cover their eyes. In some possible implementation manners, the occlusion prompting operation includes prompting visual detection whether the user occludes the left eye or the right eye. In other possible implementation manners, the eye-covering prompt operation may only prompt the vision detection user to cover his eyes.

Step S103, obtaining the optotype feedback information, and determining the target vision detection value based on the optotype feedback information and the optotype information, wherein the optotype feedback information is used to represent the recognition result of the vision detection user based on the opening orientation feedback of the optotype, and the optotype information. It includes the opening orientation information corresponding to the optotype and the visual acuity value information corresponding to the optotype.

In step S103, after the vision detection device displays the optotype, the vision detection user identifies the opening orientation of the displayed optotype and feeds back the vision detection user's recognition result of the opening orientation of the optotype to the vision detection device in a first preset manner. After the vision detection device receives the recognition result of the opening orientation of the optotype by the vision detection user, it obtains the feedback information of the optotype according to the recognition result of the opening orientation of the optotype by the vision detection user, and then judges the vision detection user according to the displayed opening orientation information of the optotype. Whether the identification of the displayed optotype is correct. For example, if the opening of the displayed optotype faces upwards, it is determined whether the judgment result of the displayed optotype in the optotype feedback information is also facing upwards. If the judgment result of the displayed optotype in the optotype feedback information is also upward, it is determined that the visual acuity detection user judges the displayed optotype correctly, thereby determining that the visual acuity detection user can clearly see the displayed optotype. If the vision test user can clearly see the displayed optotype, the vision test device displays the optotype of the previous level. For example, if the visual acuity value corresponding to the displayed optotype that the user can clearly see is 4.9, the optotype corresponding to the visual acuity value 5.0 is displayed.

It should be noted that, in order to more accurately judge whether the vision test user can clearly see the optotype of this level, the vision test user can make judgments on multiple optotypes of the same level, and accumulate the number of correct judgments. When the number of times is equal to the first threshold, it is determined that the visual acuity detection user can clearly see the optotype of this level. In addition, in order to obtain the visual acuity detection result more accurately, it is set that only when the number of correct judgments of the visual target of the level by the visual detection user is equal to the first threshold, and the number of wrong judgments of the visual target of the previous level of the level is equal to the first threshold. When the threshold value is 2, the target vision detection value is output. For example, when the visual acuity test user correctly judges that the number of times the optotype corresponding to the visual acuity 4.8 is equal to 4, and at the same time incorrectly determines that the number of times the optotype corresponding to the visual acuity 4.9 is equal to 3, the detection result of the visual acuity 4.8 is output. It should be understood that the first threshold and the second threshold may be a fixed value, or may be a numerical range. Users can set according to actual needs, which is not specifically limited in this application.

In some possible implementation manners, the vision detection user feeding back the vision detection user's recognition result of the opening orientation of the optotype to the vision detection device in a first preset manner may include: the vision detection user sends the vision detection device to the vision detection device through the eye shield. The user's recognition result of the opening orientation of the optotype. For example, set the four buttons of "up", "down", "left" and "right" on the eye shader. When the opening of the displayed optotype faces upwards, the vision detection user clicks the "up" button to send the vision detection user to the terminal device. For the recognition result of the opening orientation of the optotype, when the displayed optotype opening is oriented to the left, the vision detection user sends the recognition result of the opening orientation of the optotype by the vision detection user to the terminal device by clicking the "left" button.

In some other possible implementation manners, the vision detection user feeds back the vision detection user's recognition result of the opening orientation of the optotype to the vision detection device through the first preset manner, which may include: the vision detection user uses vision detection to detect the pointing direction of the user's finger toward vision The detection device sends the recognition result of the vision detection user to the opening orientation of the optotype. Then, the vision detection device acquires an image of the user's finger for vision detection, and then acquires optotype feedback information according to the image of the user's finger for vision detection. In the detection process, the vision detection user uses the finger to indicate the opening direction of the optotype, and the vision detection device obtains the image of the finger through the camera and recognizes it to obtain the direction indicated by the finger, thereby obtaining the optotype feedback information. The way of obtaining the recognition result of the opening orientation of the optotype by the vision detection user can be set according to actual needs, which is not specifically limited in this application.

It should be noted that the number of optotypes displayed each time is one, and if no optotype feedback information is obtained within the preset time, the next optotype will be switched. And if the number of optotypes for which no optotype feedback information is continuously obtained reaches a preset threshold, the detection is stopped.

In some embodiments, after determining the target vision detection value based on the optotype feedback information and the optotype information, the method includes: acquiring the latest vision detection value corresponding to the target identity information; calculating the target vision detection value and the latest vision detection value The deviation value of the value; if the deviation value is greater than or equal to the preset deviation threshold, the re-detection prompt operation is performed.

In this embodiment, the deviation value between the target vision detection value and the latest vision detection value corresponding to the target identity information is calculated. If the deviation value is greater than or equal to the preset deviation threshold, it means that the vision detection user's vision is greatly reduced. There may be an error in the vision test. Therefore, the vision detection device performs a re-detection prompting operation to prompt the vision detection user to perform the vision detection again. Or, when the visual acuity detection value of the left eye this time is the visual acuity detection value of the right eye last time, and the visual acuity detection value of the right eye this time is the visual acuity detection value of the left eye last time, it means that there may be an error in the visual acuity detection at this time. Therefore, at this time, the vision detection device can also perform a re-detection prompting operation to prompt the user to perform the vision detection again. It should be noted that the above-mentioned conditions for triggering the execution of the re-detection prompt operation are just an example, and when other abnormal conditions occur, the re-detection prompt operation may also be triggered to be executed.

In still other instances, after the target vision detection value is obtained, the target vision detection value may be directly displayed, or the target vision detection value may be sent to the server for storage, so that the user's detection data can be subsequently detected according to the vision detection value. Analyze and make recommendations. It should be noted that, if the user performing the vision detection is a student, the target vision detection value can also be sent to the parent, so that the parent can know the vision condition of the student in real time.

In other embodiments, the technical solution of the present application further includes: identifying a test distance of the vision detection user, and determining a vision correction value according to the test distance, where the test distance refers to the distance between the vision detection user and the optotype during vision detection. Correspondingly, determining the target vision detection value based on the optotype feedback information and the optotype information, including: determining a preliminary vision detection value based on the optotype feedback information and the optotype information; adding the preliminary vision detection value to the vision correction value, Obtain the target vision detection value.

In vision detection, the vision detection user is generally required to stand in a standard position for detection. For example, the standard international eye chart requires a distance of 5 meters between the visual inspection user and the optotype. However, in the actual detection, it is difficult for the vision detection users to stand just 5 meters away from the optotype. However, if you do not stand 5 meters away from the final visual target, it will cause errors in the visual inspection value. Therefore, before determining the target vision detection value, the present application identifies the test distance of the vision detection user, and determines the vision correction value according to the test distance, then determines the preliminary vision detection value based on the optotype feedback information and the optotype information, and finally determines the preliminary vision detection value. The value is added with the vision correction value to obtain the target vision detection value, so that the final target vision detection value is more accurate. In some embodiments, the correction value can be calculated according to the following formula:

Among them, e is the correction value, L is the test distance of the vision detection user, and m is the standard distance. It should be understood that the precision of the vision correction value can be set according to the actual situation. For example, the precision of the vision correction value can be set to 0.1.

Referring to FIG. 2 , FIG. 2 shows some examples of vision correction values corresponding to the test distance. The unit of the test distance in FIG. 2 is meters. Assuming that the standard distance is 5 meters, and using the above formula to calculate the visual acuity correction value, when the test distance is 1 meter, the visual acuity correction value is -0.7; when the test distance is 1.2 meters, the visual acuity correction value is -0.6 ; When the test distance is 1.5 meters, the visual acuity correction value is -0.5; when the test distance is 2 meters, the visual acuity correction value is -0.4; when the test distance is 2.5 meters, the visual acuity correction value is -0.3; when the test distance is When the test distance is 3 meters, the visual acuity correction value is -0.2; when the test distance is 4 meters, the visual acuity correction value is -0.1; when the test distance is 5 meters, the visual acuity correction value is 0; when the test distance is 6.3 meters, the visual acuity correction value is The value is 0.1; when the test distance is 8 meters, the vision correction value is 0.2; when the test distance is 10 meters, it is 0.3.

In some possible implementations, the test distance of the vision detection user can be identified by:

L=Df/d

Among them, L is the test distance of the vision detection user, f is the focal length of the camera, D is the actual diameter of the reference object, and d is the calculated length of the reference object.

In this implementation manner, the above-mentioned reference object is a circular icon, and the circular icon needs to have a certain pattern so that the circular icon can be identified. Figure 3 shows a circular icon. It should be understood that the circular icon shown in FIG. 3 is only an example, and in practical applications, as long as the circular icon can be identified, it can be used as a reference. During the vision detection process, the circular icon may be attached to the eye shader, or may be attached to the user and other things on the user's body. The user can select the attachment place of the reference object according to actual needs, which is not specifically limited in this application.

Next, the calculation process for calculating the length of the reference object will be described.

The reference object image is obtained first, and the reference object image is identified to obtain the outer contour point of the reference object. Since the reference object is a circular icon, the shape composed of the outer contour points of the reference object is a circle or an ellipse. When the shape composed of the outer contour points is a circle, the length of any first line segment is calculated, the first line segment passes through the center of the circle, and the two endpoints of the first line segment are the outer contour points. At this time, the length of the first line segment is the calculated length of the reference object. When the shape composed of the outer contour points is an ellipse, the distance between the two endpoints on the long axis of the ellipse is calculated. At this time, the distance is the calculated length of the reference object.

The calculation of the length of the first line segment or the calculation of the distance between the two end points on the long axis of the ellipse can be calculated according to the position coordinates of the outer contour point, or it can be calculated according to the distance between any two contour points on the outer contour point of the circle. The number of pixels s (the number of pixels between the two endpoints on the long axis of the ellipse), the pixel a×b of the camera, and the width w (or height h) of the photosensitive chip are calculated. At this time, the calculation formula for the calculation length of the reference object is as follows:

d=ws/a

or,

d=hs/b

It should be noted that, if the target vision detection value is obtained by adding the preliminary vision detection value and the vision correction value, then when determining the level of the optotype to be displayed according to the historical vision detection value, it is necessary to first subtract the historical vision detection value. The correction value corresponding to the historical vision detection value is removed, and then the first vision detection value is obtained, and then the level of the optotype displayed for the first time is obtained according to the first vision detection value.

In some other embodiments, the technical solution of the present application further includes: acquiring a first face image collected by a camera, where the first face image is a face image that a vision detection user performs vision detection; The first face feature point, the position information of each first face feature point is obtained, and the target type of the test eyes of the vision detection user is determined according to the position information of the first face feature point, and the target type includes the left or right side. One, correspondingly, determining the target vision detection value based on the optotype feedback information and the optotype information, including: based on the optotype feedback information and the optotype information, determining the target vision detection value of the user's target eye for vision detection, and the target eye is Eyes of type target type.

In this embodiment, the extracted first face feature points include: eye feature points 401 , nose tip feature points 402 and mouth corner feature points 403 . In this embodiment, before determining the visual acuity detection result, the target type of the test eye is determined, so that it can be determined whether the test data is for the left eye or the right eye. The target type of the test eye is judged according to the position information of the first face feature point. The specific process is as follows:

As shown in FIG. 4 , a coordinate axis is established by taking the preset point in the lower left corner of the first face image as the coordinate origin, and the position information of each first face feature point is obtained. For example, the coordinates of the eye feature point 401 are (x ₁ , y ₁ ), the coordinates of the nose tip feature point 402 are (x ₂ , y ₂ ), and the coordinates of the mouth corner feature point 403 are (x ₃ , y ₃ ), (x ₄ ) ,y ₄ ).

After obtaining the position information of each feature point, a straight line is drawn through the feature point 403 of the corner of the mouth, and then a vertical line x=x ₂ of the straight line is drawn through the feature point 402 of the tip of the nose, and the vertical line is extended. After the vertical line is obtained, the abscissa x ₂ of the vertical line is compared with the abscissa x ₁ of the eye feature point 401 . If the abscissa x ₁ of the feature point of the eye is smaller than the abscissa x ₂ of the vertical line, it is determined that the target type of the test eye is the right side. If the abscissa x ₁ of the feature point of the eye is greater than the abscissa x ₂ of the vertical line, it is determined that the target type of the tested eye is the left side. Or, after the vertical line is obtained, the vertical line is used as the symmetry axis to solve the symmetry point 404 of the eye feature point 401 about the symmetry axis, and the coordinates of the symmetry point 404 are (x ₅ , y ₅ ). After the symmetry point 404 is obtained, the abscissa x ₁ of the eye feature point is compared with the abscissa x ₅ of the symmetry point. If x ₁ is less than x ₅ , it is determined that the target type of the test eye is right, and if x ₁ is greater than x ₅ , it is determined that the target type of the test eye is left.

In this embodiment, if the eye-covering prompt operation includes prompting the vision detection user to cover the left eye or the right eye, the vision detection device verifies again whether the eye to be tested is the left eye or the right eye to prevent vision detection. The user does not operate according to the prompt, so that it can be more accurately determined whether the test data belongs to the right eye or the left eye. Or the eye-covering prompt operation only includes prompting the vision detection user to cover their eyes. At this time, the vision detection user can choose to test the left eye or the right eye according to their own needs, and then the vision detection device will check whether the test eye is the left eye or the right eye. The user can choose whether to test the left eye or the right eye first according to his needs.

In yet another embodiment, the technical solution of the present application further includes: acquiring a second face image collected by a camera, where the second face image is a face image of a vision detection user holding an eye mask for vision detection, and the eye mask is used for vision detection. Vision detection: The user covers the eyes during vision detection, identifies the eye shader on the second face image, determines the center position information of the eye shader, extracts the second face feature points on the second face image, and obtains each second face mask. The position information of the facial feature point, and the occlusion state of the eyes is determined according to the position information of the second facial feature point and the center position information of the eye shader, and the occlusion state includes a correct occlusion state and an incorrect occlusion state; if the occlusion state is incorrect In the occlusion state, perform the re-occlusion prompt operation.

In this embodiment, the second face feature points may include: eye feature points 501 , nose tip feature points 502 and mouth corner feature points 503 . It should be noted that 505 in FIG. 5 is an eye shade.

The occlusion state of the eyes is monitored, so as to determine whether the eyes of the vision detection user are correctly occluded during the vision detection process. If the occlusion is incorrect, the vision detection can be suspended, and the user is reminded to re-occlude until the user occlusion is correct, and then the vision detection can be started. In some embodiments, if the user's eyes are incorrectly occluded during the visual acuity detection process, the data obtained when the occlusion is incorrect may also be marked, and then these data are removed when determining the visual acuity detection result.

The calculation process of determining the occlusion state of the eyes according to the position information of the second face feature point and the center position information of the eye shutter includes: first, establishing a coordinate axis with the lower left corner preset point in the second face image as the coordinate origin, The position information of each second face feature point is obtained. For example, the coordinates of the eye feature point 501 are (x ₆ , y ₆ ), the coordinates of the nose tip feature point 502 are (x ₇ , y ₇ ), and the coordinates of the corner feature point 503 are (x ₈ , y ₈ ), (x ₉ ) , y ₉ ), the coordinates of the center point 5051 of the eye shader are (x ₁₀ , y ₁₀ ).

After obtaining the position information of the feature points of each second face feature point, connect the feature points of the corners of the mouth into a straight line, then pass the feature point of the tip of the nose to make the vertical line of the straight line and extend the vertical line, after obtaining the vertical line, use the vertical line For the symmetry axis, the symmetry point 504 of the eye feature point 501 about the symmetry axis is solved, and the coordinates of the symmetry point 504 are (x ₁₁ , y ₁₁ ). Then calculate the Euclidean distance between the symmetrical point 504 and the center point 5051 of the eye shutter. If the Euclidean distance is smaller than the preset threshold, it is determined that the occlusion is correct, and if the Euclidean distance is greater than the preset threshold, it is determined that the occlusion is incorrect.

In this embodiment, it is monitored whether the user's eyes are correctly occluded during the vision detection process. If the occlusion is incorrect, the vision detection can be suspended, and the user can be reminded to re-occlude until the user's occlusion is correct, and then the vision detection can be started. Determine the user's vision test results.

To sum up, the present application provides a vision detection method. First, when a vision detection instruction is detected, target identity information of a vision detection user is acquired according to a preset method. Then, the historical vision detection value corresponding to the target identity information is obtained, the level of the optotype displayed for the first time is determined according to the historical vision detection value, and the optotype corresponding to the level is displayed. Finally, the optotype feedback information is obtained, and the target vision detection value is determined based on the optotype feedback information and the optotype information, wherein the optotype feedback information is used to indicate the recognition result of the vision detection user based on the feedback of the opening orientation of the optotype, and the optotype information includes the optotype. The opening orientation information corresponding to the marker and the visual acuity value information corresponding to the optotype. That is, in the present application, by automatically displaying the optotype, the user can perform visual inspection independently, which is simple and convenient and has high efficiency. And in this application, the level of the optotype displayed for the first time is determined according to the historical vision detection value of the vision detection user, so that the vision detection can be started at the optotype near the optotype corresponding to the vision value of the vision detection user, thereby reducing vision detection. time.

It should be understood that the size of the sequence numbers of the steps in the above embodiments does not mean the sequence of execution, and the execution sequence of each process should be determined by its function and internal logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.

Embodiment 2

FIG. 6 shows an example of a vision detection apparatus. For the convenience of description, only the parts related to the embodiments of the present application are shown. The apparatus 600 includes:

The vision detection instruction detection module 601 is configured to acquire target identity information of the vision detection user according to a preset method when the vision detection instruction is detected;

The optotype display module 602 is configured to acquire the historical vision detection value corresponding to the target identity information, determine the level of the optotype to be displayed according to the historical vision detection value, and display the optotype corresponding to the level.

The target vision detection value determination module 603 is used to obtain the optotype feedback information, and determine the target vision detection value based on the optotype feedback information and the optotype information, wherein the optotype feedback information is used to indicate the vision detection user based on the optotype opening orientation feedback The information of the optotype includes the opening orientation information corresponding to the optotype and the visual acuity value information corresponding to the optotype.

Optionally, the apparatus 600 further includes:

The test distance identification module is used to identify the test distance of the vision detection user, and determine the vision correction value according to the test distance. The test distance refers to the distance between the vision detection user and the optotype during vision detection.

Correspondingly, the target vision detection value determination module 603 includes:

The preliminary vision detection value determination unit is used to determine the preliminary vision detection value based on the feedback information of the optotype and the information of the optotype.

The adding unit is used for adding the preliminary vision detection value and the vision correction value to obtain the target vision detection value.

Optionally, the apparatus 600 further includes:

The first face image acquisition module is configured to acquire the first face image collected by the camera, and the first face image is the face image of the vision detection user performing vision detection.

The position information obtaining module is used for extracting the first face feature points on the first face image to obtain the position information of each first face feature point.

The eye type determination module is used for determining the target type of the test eyes of the vision detection user according to the position information of the first face feature point, and the target type is one of left side or right side.

Correspondingly, the target vision detection value determination module 603 includes for performing:

Based on the feedback information of the optotype and the information of the optotype, the target vision detection value of the target eye of the vision detection user is determined, and the target eye is the eye of the target type.

Optionally, the apparatus 600 further includes:

The second face image acquisition module is used to acquire the second face image collected by the camera. The second face image is the face image of the vision detection user holding the eye shield for vision detection, and the eye shield is used for vision detection. Cover the eyes during detection.

The eye-shade identification module is used to identify the eye-shade on the second face image, and determine the center position information of the eye-shade.

The position information obtaining module is used for extracting the second face feature points on the second face image to obtain the position information of each second face feature point.

an occlusion state determination module, configured to determine the occlusion state of the test eye of the vision detection user according to the position information of the second face feature point and the center position information of the eye shader, where the occlusion state includes a correct occlusion state and an incorrect occlusion state;

The re-occlusion prompt operation prompt module is used to execute the re-occlusion prompt operation if the occlusion state is an incorrect occlusion state.

Optionally, the apparatus 600 further includes:

The matching module is used to match the target identity information with the identity information in the preset identity information database.

The query module is configured to obtain the historical vision detection value corresponding to the target identity information if there is identity information matching the target identity information in the preset identity information database.

Optionally, the apparatus 600 further includes:

The visual acuity detection value acquisition module is used to acquire the latest visual detection value corresponding to the target identity information.

The calculation module is used to calculate the deviation value between the target vision detection value and the latest vision detection value corresponding to the target identity information.

The prompt operation module is configured to perform a re-detection prompt operation if the deviation value is greater than or equal to the preset deviation threshold.

Optionally, preset methods, including:

At least one of identifying the face image of the vision detection user, collecting the fingerprint information of the vision detection user, and collecting the identity card information of the vision detection user.

It should be noted that the information exchange, execution process and other contents between the above-mentioned devices/units are based on the same concept as the method embodiment 1 of the present application, and the specific functions and technical effects brought about by them can be found in the part of the method embodiment for details. It will not be repeated here.

Embodiment 3

FIG. 7 is a schematic diagram of a terminal device provided in Embodiment 3 of the present application. As shown in FIG. 7 , the terminal device 700 in this embodiment includes: a processor 701 , a memory 702 , and a computer program 703 stored in the above-mentioned memory 702 and executable on the above-mentioned processor 701 . When the above-mentioned processor 701 executes the above-mentioned computer program 703, the steps in each of the above-mentioned method embodiments are implemented. Alternatively, when the above-mentioned processor 701 executes the above-mentioned computer program 703, the functions of each module/unit in each of the above-mentioned apparatus embodiments are implemented.

Exemplarily, the above-mentioned computer program 703 may be divided into one or more modules/units, and the above-mentioned one or more modules/units are stored in the above-mentioned memory 702 and executed by the above-mentioned processor 701 to complete the present application. The above-mentioned one or more modules/units may be a series of computer program instruction segments capable of performing specific functions, and the instruction segments are used to describe the execution process of the above-mentioned computer program 703 in the above-mentioned terminal device 700 . For example, the above-mentioned computer program 703 can be divided into a vision detection instruction detection module, an optotype display module and a target vision detection value determination module, and the specific functions of each module are as follows:

When the vision detection instruction is detected, obtain the target identity information of the vision detection user according to a preset method;

Obtain the historical vision detection value corresponding to the target identity information, determine the level of the optotype to be displayed according to the historical vision detection value, and display the optotype corresponding to the level;

Obtain optotype feedback information, and determine the target vision detection value based on the optotype feedback information and the optotype information, wherein the optotype feedback information is used to indicate that the vision detection user feedback based on the opening orientation of the optotype The information of the optotype includes the opening orientation information corresponding to the optotype and the visual acuity value information corresponding to the optotype.

The above-mentioned terminal device may include, but is not limited to, the processor 701 and the memory 702 . Those skilled in the art can understand that FIG. 7 is only an example of the terminal device 700, and does not constitute a limitation to the terminal device 700, and may include more or less components than the one shown, or combine some components, or different components For example, the above-mentioned terminal device may also include input and output devices, network access devices, buses, and the like.

The so-called processor 701 may be a central processing unit (Central Processing Unit, CPU), and may also be other general-purpose processors, digital signal processors (Digital Signal Processors, DSP), application specific integrated circuits (Application Specific Integrated Circuit, ASIC), Field-Programmable Gate Array (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware plug-ins, and the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

The above-mentioned memory 702 may be an internal storage unit of the above-mentioned terminal device 700 , such as a hard disk or a memory of the terminal device 700 . The above-mentioned memory 702 may also be an external storage device of the above-mentioned terminal device 700, for example, a plug-in hard disk, a smart memory card (Smart Media Card, SMC), a Secure Digital (Secure Digital, SD) card, a flash memory card equipped on the above-mentioned terminal device 700 (Flash Card) etc. Further, the above-mentioned memory 702 may also include both an internal storage unit of the above-mentioned terminal device 700 and an external storage device. The above-mentioned memory 702 is used to store the above-mentioned computer program and other programs and data required by the above-mentioned terminal device. The above-mentioned memory 702 may also be used to temporarily store data that has been output or will be output.

Those skilled in the art can clearly understand that, for the convenience and simplicity of description, only the division of the above-mentioned functional units and modules is used as an example. Module completion, that is, dividing the internal structure of the above device into different functional units or modules to complete all or part of the functions described above. Each functional unit and module in the embodiment may be integrated in one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit, and the above-mentioned integrated units may adopt hardware. It can also be realized in the form of software functional units. In addition, the specific names of the functional units and modules are only for the convenience of distinguishing from each other, and are not used to limit the protection scope of the present application. For the specific working processes of the units and modules in the above-mentioned system, reference may be made to the corresponding processes in the foregoing method embodiments, which will not be repeated here.

In the foregoing embodiments, the description of each embodiment has its own emphasis. For parts that are not described or described in detail in a certain embodiment, reference may be made to the relevant descriptions of other embodiments.

Those of ordinary skill in the art can realize that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Skilled artisans may implement the described functionality using different methods for each particular application, but such implementations should not be considered beyond the scope of this application.

In the embodiments provided in this application, it should be understood that the disclosed apparatus/terminal device and method may be implemented in other manners. For example, the apparatus/terminal device embodiments described above are only illustrative. For example, the division of the above modules or units is only a logical function division. In actual implementation, there may be other division methods, such as multiple units or Plugins can be combined or can be integrated into another system, or some features can be omitted, or not implemented. On the other hand, the shown or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, indirect coupling or communication connection of devices or units, and may be in electrical, mechanical or other forms.

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

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

If the above-mentioned integrated modules/units are implemented in the form of software functional units and sold or used as independent products, they may be stored in a computer-readable storage medium. Based on this understanding, the present application can implement all or part of the processes in the above-mentioned method embodiments, and can also be completed by instructing relevant hardware through a computer program, and the above-mentioned computer program can be stored in a computer-readable storage medium. When the program is executed by the processor, the steps of the foregoing method embodiments can be implemented. Wherein, the above-mentioned computer program includes computer program code, and the above-mentioned computer program code may be in the form of source code, object code form, executable file or some intermediate form. The above-mentioned computer-readable medium may include: any entity or device capable of carrying the above-mentioned computer program code, recording medium, U disk, mobile hard disk, magnetic disk, optical disk, computer memory, read-only memory (ROM, Read-Only Memory), random Access memory (RAM, Random Access Memory), electric carrier signal, telecommunication signal, and software distribution medium, etc. It should be noted that the content contained in the above-mentioned computer-readable media may be appropriately increased or decreased according to the requirements of legislation and patent practice in the jurisdiction, for example, in some jurisdictions, according to legislation and patent practice, the computer-readable media does not Including electrical carrier signals and telecommunication signals.

The above-mentioned embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the above-mentioned embodiments, those of ordinary skill in the art should understand that the above-mentioned embodiments can still be used for The recorded technical solutions are modified, or some technical features thereof are equivalently replaced; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the application, and should be included in the present application. within the scope of protection of the application.

Claims (10)

1. A method of vision testing, comprising:

when a vision detection instruction is detected, acquiring target identity information of a vision detection user according to a preset mode;

obtaining historical vision detection values corresponding to the target identity information, determining the grade of a visual target to be displayed according to the historical vision detection values, and displaying the visual target corresponding to the grade;

the method comprises the steps of obtaining visual target feedback information, and determining a target vision detection value based on the visual target feedback information and the visual target information, wherein the visual target feedback information is used for representing a recognition result fed back by a vision detection user based on the opening direction of the visual target, and the visual target information comprises opening direction information corresponding to the visual target and vision value information corresponding to the visual target.

2. The vision testing method of claim 1, further comprising:

identifying a test distance of the vision detection user, and determining a vision correction value according to the test distance, wherein the test distance refers to the distance between the vision detection user and the sighting target during vision detection;

the determining a target vision detection value based on the sighting target feedback information and the sighting target information comprises:

determining a preliminary vision detection value based on the sighting target feedback information and the sighting target information;

and adding the preliminary vision detection value and the vision correction value to obtain the target vision detection value.

3. The vision testing method of claim 1, further comprising:

acquiring a first face image acquired by a camera, wherein the first face image is a face image for the vision detection of the vision detection user;

extracting first face characteristic points on the first face image to obtain position information of each first face characteristic point;

determining a target type of a test eye of the vision testing user according to the position information of the first face feature point, wherein the target type is one of a left side or a right side;

the determining a target vision detection value based on the sighting target feedback information and the sighting target information comprises:

and determining a target vision detection value of a target eye of the vision detection user based on the visual target feedback information and the visual target information, wherein the target eye is the eye of which the type is the target type.

4. The vision testing method of claim 1, further comprising:

acquiring a second face image acquired by a camera, wherein the second face image is a face image for vision detection of a vision detection user holding an eye shield, and the eye shield is used for shielding eyes of the vision detection user during vision detection;

identifying an eye mask on the second face image, and determining the center position information of the eye mask;

extracting second face characteristic points on the second face image to obtain position information of the second face characteristic points;

determining the occlusion state of the test eye of the vision detection user according to the position information of the second face characteristic point and the central position information of the eye shade, wherein the occlusion state is one of a correct occlusion state or an incorrect occlusion state;

and if the shielding state is the incorrect shielding state, executing re-shielding prompt operation.

5. The vision testing method of claim 1, wherein said obtaining historical vision testing values corresponding to the target identity information comprises:

matching the target identity information with identity information in a preset identity information database;

and if the identity information matched with the target identity information exists in the preset identity information database, acquiring a historical vision detection value corresponding to the target identity information.

6. A vision testing method as described in claim 1, wherein after said determining a target vision test value based on said optotype feedback information and said optotype information, comprising:

acquiring the latest vision detection value corresponding to the target identity information;

calculating a deviation value between the target vision detection value and the latest vision detection value;

and if the deviation value is greater than or equal to a preset deviation threshold value, executing re-detection prompting operation.

7. The vision testing method of claim 1, wherein the predetermined manner includes:

and identifying at least one of the face image of the vision detection user, collecting fingerprint information of the vision detection user and collecting identity card information of the vision detection user.

8. A vision testing device, comprising:

the vision detection instruction detection module is used for acquiring target identity information of a vision detection user according to a preset mode when a vision detection instruction is detected;

the visual target display module is used for acquiring historical vision detection values corresponding to the target identity information, determining the grade of a visual target to be displayed according to the historical vision detection values and displaying the visual target corresponding to the grade;

and the target vision detection value determining module is used for acquiring visual target feedback information and determining the target vision detection value based on the visual target feedback information and the visual target information, wherein the visual target feedback information is used for representing the recognition result fed back by the vision detection user based on the opening direction of the visual target, and the visual target information comprises the opening direction information corresponding to the visual target and the vision value information corresponding to the visual target.

9. A terminal device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, characterized in that the processor implements the method according to any of claims 1-7 when executing the computer program.

10. A computer-readable storage medium, in which a computer program is stored which, when being executed by a processor, carries out the method according to any one of claims 1-7.

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