CN118732273A - A method, system and device for adjusting brightness uniformity of NED equipment - Google Patents

Abstract

The application belongs to the field of near-to-eye display, and particularly discloses a brightness uniformity adjusting method, a system and equipment of NED equipment, wherein the method comprises the following steps: obtaining a first flat field correction coefficient obtained by performing flat field correction on NED detection equipment by taking a large-view-field uniform light source as a calibration light source; acquiring an image of a picture displayed by the NED equipment through the NED equipment to obtain a first image; performing flat field correction on the first imaging image by using the first flat field correction coefficient to obtain a first corrected image; and determining a second flat field correction coefficient based on the first correction image, and applying the second flat field correction coefficient to a picture displayed by the NED equipment to obtain a corrected display picture. The application can improve the uniformity of the brightness of the NED equipment from 50% to more than 90%, and greatly improves the display quality of the NED equipment.

Description

A method, system and device for adjusting brightness uniformity of NED equipment

Technical Field

The present application belongs to the field of near eye display (NED), and more specifically, to a method, system and device for adjusting the brightness and chromaticity uniformity of a NED device.

Background Art

With the development of science and technology, NED technologies such as Virtual Reality (VR), Augmented Reality (AR) and Mixed Reality (MR) have been increasingly widely used in games, education, medical care and other fields.

These NED devices project virtual images into the user's eyes through an optical system, allowing the user to immerse in a virtual environment. However, due to the characteristics of the optical system, the projected virtual image must have dark corners, resulting in low brightness and color uniformity, usually below 50%, and the larger the field of view, the worse the uniformity. This is an important issue for the quality control of NED devices because users are very sensitive to the uniformity of brightness and color.

Summary of the invention

In view of the defects of the prior art, the purpose of the present application is to provide a method, system and device for adjusting the brightness and chromaticity uniformity of a NED device, aiming to solve the problem of low brightness and chromaticity uniformity of existing NED devices.

To achieve the above objectives, in a first aspect, the present application provides a method for adjusting brightness uniformity of a NED device, comprising:

Obtaining a first flat field correction coefficient by performing flat field correction on the NED detection equipment using a large field uniform light source as a calibration light source;

Acquire a first captured image by capturing an image displayed by the NED device through the NED detection device;

Performing flat-field correction on the first captured image using the first flat-field correction coefficient to obtain a first corrected image;

A second flat field correction coefficient is determined based on the first corrected image, and the second flat field correction coefficient is applied to a picture displayed by the NED device to obtain a corrected display picture.

It can be understood that in this application, the vignetting introduced by the NED test equipment when capturing images of the NED display screen is taken into consideration, and a light source with a large field of view and uniformity is used as a calibration light source to determine the vignetting correction coefficient introduced by the NED test equipment. After that, the captured image is subjected to a first flat field correction. The corrected image obtained is closer to the actual situation of the image displayed by the NED device, thereby improving the brightness measurement accuracy of the NED detection equipment.

Furthermore, the NED device includes a NED display and a NED optical system; and the NED optical system will introduce vignetting into the picture displayed on the NED display; at this time, the captured image after the first flat field correction can reflect the situation in which the optical system of the NED device introduces vignetting into its displayed image, and the flat field correction coefficient corresponding to the second flat field correction of the internal optical system of the NED device can be determined based on the corrected captured image; then the flat field correction coefficient is applied to the picture displayed by the NED device, that is, the flat field correction compensation of the NED optical system is achieved by adjusting the NED display, so that a display picture that is not affected by the vignetting introduced by the internal optical system of the NED device can be obtained, thereby greatly improving the brightness and color uniformity of the picture displayed by the NED device.

In an optional example, after obtaining the corrected display image, the method further includes:

Using the NED detection device to capture an image of the display screen corrected by the NED device again to obtain a second captured image;

Performing flat field correction on the second captured image using the first flat field correction coefficient to obtain a second corrected image;

DeMura is performed on the display picture corrected by the NED device according to the second corrected image to obtain a repaired display picture.

It should be noted that after the vignetting correction introduced by the optical system of the NED device, theoretically, when the NED display screen is lit according to the preset grayscale, the brightness and chromaticity values at each pixel in the corresponding virtual image are consistent and equal to the target values. However, the brightness and chromaticity of the NED device display may not fully reach the target value at this time. Therefore, DeMura repair is required to further perform brightness and chromaticity compensation to further improve the brightness and chromaticity consistency of the display screen.

In an optional example, the first flat field correction coefficient is determined by the following steps:

Acquire an image captured by the NED detection device on the large-field uniform light source to obtain a third captured image;

A first flat field correction coefficient is obtained based on the response of the central area of the third captured image.

In an optional example, the second flat field correction coefficient is determined by the following steps:

A second flat field correction coefficient is obtained based on the response of the central area of the first corrected image.

In an optional example, the NED device includes two optical display systems, and the DeMura target values of the two optical display systems are the same.

Optionally, since the NED device has two optical display systems, each optical display system includes a corresponding optical system and a display screen; in order to ensure the binocular display consistency of the NED device, when DeMura is performed on the NED device display screen, the corresponding target values should be kept the same to ensure the binocular consistency of the NED device.

In a second aspect, the present application provides a method for adjusting brightness uniformity of a near-eye display (NED) device, comprising:

Obtaining a first flat field correction coefficient by performing flat field correction on the NED detection equipment using a large field uniform light source as a calibration light source;

Acquire a first captured image obtained by capturing an image displayed by the NED device through the NED detection device;

Performing flat-field correction on the first captured image using the first flat-field correction coefficient to obtain a first corrected image;

DeMura is performed on the picture displayed by the NED device based on the first corrected image to obtain a repaired display picture.

It should be noted that the present application can also directly perform DeMura on the NED device based on the image captured by the NED detection device corresponding to the flat field corrected image. This solution can also improve the brightness and color uniformity of the NED device, and the improvement effect is relatively good.

In a third aspect, the present application provides a brightness uniformity adjustment system for a NED device, comprising: a NED detection device, a processing unit, and a NED display adjustment unit;

The NED detection device is used to capture an image displayed by the NED device to obtain a first captured image;

The processing unit is used to perform flat field correction on the first captured image using a first flat field correction coefficient to obtain a first corrected image, and determine a second flat field correction coefficient based on the first corrected image; the first flat field correction coefficient is obtained by performing flat field correction on the NED detection equipment using a large field uniform light source as a calibration light source;

The NED display adjustment unit is used to apply the second flat field correction coefficient to the picture displayed by the NED device to obtain a corrected display picture.

For example, the processing unit may be implemented by a computer, a processor or other hardware or software capable of performing calculations.

In an optional example, the NED detection device is further used to capture the display screen corrected by the NED device again to obtain a second captured image;

The processing unit is further configured to perform flat field correction on the second captured image using the first flat field correction coefficient to obtain a second corrected image;

The NED display adjustment unit is used to perform DeMura on the display picture corrected by the NED device according to the second correction image to obtain a repaired display picture.

In a fourth aspect, the present application provides a brightness uniformity adjustment system for a near-eye display (NED) device, including: a NED detection device, a processing module, and a NED display adjustment module;

The NED detection device is used to capture an image displayed by the NED device to obtain a first captured image;

The processing module is used to perform flat field correction on the first captured image using a first flat field correction coefficient to obtain a first corrected image; the first flat field correction coefficient is obtained by performing flat field correction on the NED detection equipment using a large field uniform light source as a calibration light source;

The NED display adjustment module is used to perform DeMura on the picture displayed by the NED device based on the first correction image to obtain a repaired display picture.

For example, the above processing module can be implemented by a computer, a processor or other hardware or software capable of performing calculations.

In a fifth aspect, the present application provides a NED device, which adjusts brightness and chromaticity uniformity using the method described in the first aspect or any optional example of the first aspect.

In a sixth aspect, the present application provides an electronic device comprising: at least one memory for storing programs; and at least one processor for executing the programs stored in the memory. When the programs stored in the memory are executed, the processor is used to execute the method described in the first aspect or any optional example of the first aspect.

In a seventh aspect, the present application provides a computer-readable storage medium, which stores a computer program. When the computer program runs on a processor, the processor executes the method described in the first aspect or any optional example of the first aspect.

In an eighth aspect, the present application provides a computer program product. When the computer program product runs on a processor, the processor executes the method described in the first aspect or an optional example of the first aspect.

It can be understood that the beneficial effects of the third to eighth aspects mentioned above can be found in the relevant description of the first aspect mentioned above, and will not be repeated here.

In general, the above technical solutions conceived by the present application have at least the following beneficial effects compared with the prior art:

The present application provides a method, system and device for adjusting the brightness and chromaticity uniformity of a NED device, which first performs a first flat field correction on the vignetting introduced by the NED test device when taking images, and then determines the parameters of the vignetting introduced by the internal optical system of the NED device based on the image after the first flat field correction, and adjusts the NED device display screen based on the parameters to perform a second flat field correction, so that the display screen of the NED device after the flat field correction is not affected by the vignetting introduced by its optical system, thereby improving the brightness and chromaticity uniformity of the display screen. Furthermore, the present application further takes images based on the improved display screen, and further performs DeMura repair on the NED device, so as to perform brightness and chromaticity compensation on the NED device again, and further improve the brightness and chromaticity consistency of the NED device display screen.

The present application provides a method, system and device for adjusting the brightness and chromaticity uniformity of a NED device. When performing the first flat field correction, a large field uniform light source is used as a calibration light source, which can ensure the accuracy of the first flat field correction. After that, performing a second flat field correction on the NED device can improve the brightness and chromaticity uniformity of the NED device display screen to more than 90%. On this basis, performing DeMura repair can further improve the effect to more than 98%, greatly improving the display quality of the NED device.

The present application provides a method, system and device for adjusting the brightness and chromaticity uniformity of a NED device, which can directly DeMura the display screen of the NED device based on the image after the first flat field correction. Although there are certain difficulties in direct DeMura, it can be achieved by verification by technical personnel in this field. It is also found that the solution can also improve the brightness and chromaticity uniformity of the NED device to more than 95%, which can also meet user needs and improve the display quality of the NED device.

The present application provides a method, system and device for adjusting the brightness and chromaticity uniformity of a NED device. The method provided by the present application can be used to perform the above-mentioned flat field correction and DeMura operation on the binoculars respectively, thereby achieving consistency compensation of binocular brightness and chromaticity and their uniformity, and further improving the yield of NED products. Since the solution provided by the present application improves the brightness and chromaticity uniformity of the NED device and achieves binocular consistency compensation, users can enjoy more uniform and realistic virtual images when using the NED device, which greatly improves the user experience and promotes the development of NED technology.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of an optical system for testing a VR device provided in an embodiment of the present application;

FIG2 is a flow chart of a method for adjusting brightness uniformity of a NED device provided in an embodiment of the present application;

FIG3 is another flow chart of a method for adjusting brightness and chromaticity uniformity of a NED device provided in an embodiment of the present application;

FIG4 is another flow chart of a method for adjusting brightness and chromaticity uniformity of a NED device provided in an embodiment of the present application;

FIG5 is a specific flow chart of a method for adjusting brightness uniformity of a NED device provided in an embodiment of the present application;

FIG6 is a schematic diagram of a brightness and chromaticity uniformity adjustment system for a NED device provided in an embodiment of the present application;

FIG7 is another architecture diagram of a brightness and chromaticity uniformity adjustment system for a NED device provided in an embodiment of the present application;

FIG8 is an architecture diagram of an electronic device provided in an embodiment of the present application.

DETAILED DESCRIPTION

In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

The term "and/or" in this article is a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and/or B can represent: A exists alone, A and B exist at the same time, and B exists alone. The symbol "/" in this article indicates that the associated objects are in an or relationship, for example, A/B means A or B.

The terms "first" and "second" in the specification and claims herein are used to distinguish different objects rather than to describe a specific order of objects. For example, the first captured image and the second captured image are used to distinguish different captured images rather than to describe a specific order of captured images. The first corrected image and the second corrected image are used to distinguish different corrected images rather than to describe a specific order of corrected images.

In the embodiments of the present application, words such as "exemplary" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a specific way.

Taking the NED device as a VR device as an example, Figure 1 is a schematic diagram of an optical system for testing VR provided in an embodiment of the present application; as shown in Figure 1, the test system includes: a NED detection device; the NED detection device includes: an aperture, a NED test lens and an image receiving sensor; the aperture of the NED detection device is placed in front of the NED test lens, and the image receiving sensor is placed behind the NED test lens.

The test object of the NED detection equipment is a NED device represented by a VR device, wherein the VR device includes: a VR display screen and a VR optical system.

Exemplarily, the VR display screen is usually a 2-3 inch LCD screen or micro LED screen. The VR display screen is placed to the right of the object focus of the VR optical system. In this way, the VR display screen becomes a virtual image approximately at infinity after passing through the VR optical system. The above virtual image is the picture displayed by the VR device.

Among them, the exit pupil of the VR optical system is on the right side of the VR optical system. It is necessary to use a NED test lens with an aperture in front to place the aperture at the exit pupil of the VR optical system. This scene is similar to the human eye pupil being located at the exit pupil of the VR optical system. In this way, pupil-window docking can be achieved, similar to the human eye being able to observe the virtual image in the entire field of view of the VR. When the entrance pupil of the NED test lens is placed at the exit pupil of the VR optical system, the NED detection equipment can image the virtual image of the entire field of view of the VR. The above content can refer to the basic method or principle of using an imaging colorimeter to realize the imaging of the entire virtual image of the VR.

It is understandable that since VR devices have an optical system in addition to a display screen, the virtual image transmitted by the optical system has dark corners, which will result in low brightness and color uniformity of the virtual image. The NED detection equipment includes a NED test lens, which will introduce dark corners in the captured image when capturing the above virtual image.

It can be understood by those skilled in the art that the conventional display screen brightness and chromaticity uniformity compensation method is to capture an image of the display screen, and then perform DeMura compensation on the display screen according to the brightness and chromaticity values of each pixel in the captured image to improve the brightness and chromaticity uniformity of the display screen. In this application, flat field correction is performed considering the dark angle introduced by the NED detection equipment, so that the captured image at this time can better reflect the actual situation of the above virtual image, so as to compensate for the brightness and chromaticity uniformity of the above virtual image. For the specific method, please refer to the description of the embodiments in Figures 2 to 4 below.

FIG. 2 is a flow chart of a method for adjusting brightness uniformity of a NED device provided in an embodiment of the present application. As shown in FIG. 2 , the method includes the following steps:

Step S101, obtaining a first flat field correction coefficient by performing flat field correction on a NED detection device using a large field uniform light source as a calibration light source;

Step S102, capturing an image displayed by the NED device through the NED detection device to obtain a first captured image;

Step S103, performing flat field correction on the first captured image using the first flat field correction coefficient to obtain a first corrected image;

Step S104 , determining a second flat field correction coefficient based on the first corrected image, and applying the second flat field correction coefficient to the picture displayed by the NED device to obtain a corrected display picture.

At this time, the second flat field correction coefficient corresponds to the compensation coefficient of the vignetting introduced by the internal optical system of the NED device to its display screen. Compensating the NED device display screen based on the second flat field correction coefficient can achieve the first compensation of the NED device display screen. The corrected display screen is no longer affected by the vignetting introduced by the internal optical system of the NED device, and its brightness and color uniformity will be greatly improved.

After verification by the researchers and developers of this application, it was found that the above method can improve the brightness and color uniformity of the NED device display image to more than 90%.

Optionally, the first flat field correction coefficient is determined by the following steps:

Acquire an image captured by a NED detection device on the large-field uniform light source to obtain a third captured image;

A first flat field correction coefficient is obtained based on the response of the central area of the third captured image.

Optionally, the second flat field correction coefficient is determined by the following steps:

A second flat field correction coefficient is obtained based on the response of the central area of the first corrected image.

The specific calculation formula of the flat field correction coefficient can be found in the description of the embodiment in FIG. 4 , and will not be described in detail here.

In an optional example, the NED device includes two optical display systems, and the DeMura target values of the two optical display systems are the same.

For example, when the second flat field correction is performed on two optical display systems, the corresponding second flat field correction coefficients depend on the inherent parameters of the two optical display systems.

FIG. 3 is another flow chart of a method for adjusting brightness uniformity of a NED device provided in an embodiment of the present application. As shown in FIG. 3 , the method includes the following steps:

Step S101, obtaining a first flat field correction coefficient by performing flat field correction on a NED detection device using a large field uniform light source as a calibration light source;

Step S102, capturing an image displayed by the NED device through the NED detection device to obtain a first captured image;

Step S103, performing flat field correction on the first captured image using the first flat field correction coefficient to obtain a first corrected image;

Step S104, determining a second flat field correction coefficient based on the first corrected image, and applying the second flat field correction coefficient to a picture displayed by the NED device to obtain a corrected display picture;

Step S105, using the NED detection device to capture an image of the display screen calibrated by the NED device again to obtain a second captured image;

Step S106, performing flat field correction on the second captured image using the first flat field correction coefficient to obtain a second corrected image;

Step S107 , performing DeMura on the display picture corrected by the NED device according to the second corrected image to obtain a repaired display picture.

Obviously, after taking an image again and performing the first flat field correction on the NED device on the basis of the second flat field correction, it can be understood that the corrected image at this time reflects the actual situation of the NED display screen with greatly improved brightness and chromaticity uniformity after the second flat field correction; further DeMura based on the actual display situation at this time can further improve the brightness and chromaticity uniformity of the NED device display screen.

After further verification by the researchers and developers of this application, it was found that the above method can improve the brightness and color uniformity of the NED device display image to more than 98%.

FIG. 4 is another flow chart of a method for adjusting brightness and chromaticity uniformity of a NED device provided in an embodiment of the present application. As shown in FIG. 4 , the method includes the following steps:

Step S201, obtaining a first flat field correction coefficient by performing flat field correction on the NED detection equipment using a large field uniform light source as a calibration light source;

Step S202, obtaining a first captured image by capturing an image displayed by the NED device through the NED detection device;

Step S203, performing flat field correction on the first captured image using the first flat field correction coefficient to obtain a first corrected image;

Step S204: DeMura the picture displayed by the NED device based on the first corrected image to obtain a repaired display picture.

For example, the specific implementation method of DeMura mentioned in this application can be found in the records of relevant prior art and will not be further described in this application.

FIG5 is a specific flow chart of a method for adjusting brightness uniformity of a NED device provided in an embodiment of the present application; as shown in FIG5 , the method includes the following two schemes:

Solution 1: Step 1, the virtual image formed by the NED display screen through the NED optical system is recorded as Pattern, and the image formed by the Pattern through the NED detection equipment is recorded as Im2.

Step 2: When the human eye directly observes the virtual image Pattern, the first flat field correction can be automatically completed. However, the NED test equipment needs to complete the first flat field correction to accurately test the brightness and uniformity of the NED virtual image to match the human eye observation effect. Since the NED test lens will introduce vignetting when the NED detection equipment takes images, it is necessary to first perform the first flat field correction on Im2 to correct the vignetting caused by the NED test lens to the image. The corrected image is recorded as Im2Cor.

The specific implementation method of the first flat field correction is as follows: use a light source with a large field of view and uniformity as the calibration light source, use the NED detection equipment to take an image of the calibration light source and record it as I, and use the central area response I0 of I as the reference to obtain the first flat field correction coefficient FFCCoef1 = I0/I, then Im2Cor = Im2*FFCCoef1. If the accuracy of the first flat field correction meets the standard, then Im2Cor = Pattern. Due to the vignetting effect of the NED optical system, the brightness uniformity of Im2Cor is usually below 50%, that is, when the vignetting caused by the NED optical system to the virtual image is not corrected, the brightness uniformity of the NED detected by conventional NED detection products is usually below 50%.

Step 3: If you need to compensate for the brightness non-uniformity of the NED virtual image, you can first compensate for the vignetting caused by the NED optical system:

Since the NED optical system and NED display have been packaged, they cannot be separated during the brightness and chromaticity test. However, the NED display will be DeMura-ed before being packaged into NED glasses to ensure that its brightness uniformity meets the standard. Therefore, the NED display can be used as a uniform surface light source. The center of Im2Cor, Im2CorCen, is used as the reference to generate the secondary flat field correction coefficient FFCCoef2 = Im2CorCen/Im2Cor. Then, after the secondary flat field correction, the NED device displays the screen PatternCor1 = Im2Cor*FFCCoef2. In this way, after two flat field corrections, the uniformity of the image PatternCor1 can reach more than 90%.

Step 4. The uniformity of the virtual image obtained by directly displaying PatternCor1 on the NED display will be greatly improved, but the brightness uniformity of the virtual image may still not meet the requirements of the NED manufacturer. In this case, the brightness distribution of the virtual image corresponding to PatternCor1 tested by the NED detection equipment can be used to obtain its brightness uniformity compensation coefficient DeMuraCoef1, and the compensation coefficient DeMuraCoef1 is applied to PatternCor1 again to form PatternCor2. When the NED display displays PatternCor2, the brightness and color uniformity of the projected virtual image can be further improved, which can be increased to more than 98%.

Solution 2: Step 1: Use the NED display screen to directly display the Pattern; the image formed by the NED detection equipment is recorded as Im2.

Step 2: Perform the first flat field correction on Im2 to correct the vignetting caused by the NED test lens. The corrected image is recorded as Im2Cor.

Step 3: Generate the brightness uniformity compensation coefficient DeMuraCoef based on the brightness distribution of Im2Cor, directly compensate Pattern, and obtain the compensated picture PatternCor.

After further verification by the researchers of this application, it was found that the above method can improve the brightness and color uniformity of the NED device display to more than 95%. However, due to the large vignetting angle of the NED optical system, this single compensation method will increase the difficulty of generating and applying the compensation coefficient.

It can be understood that in the above-mentioned schemes 1 and 2, the first method is to first use the virtual image as the calibration light source to obtain the first compensation coefficient of the virtual image brightness uniformity, that is, the secondary flat field correction coefficient, and apply the compensation coefficient to the picture displayed on the NED display screen, and then test the brightness distribution of the compensated virtual image again, and then use the DeMura technology to obtain the brightness uniformity compensation coefficient based on the brightness distribution, and apply the secondary flat field correction coefficient FFCCoef2 and the brightness uniformity compensation coefficient DeMuraCoef1 obtained twice before and after to the picture displayed on the NED display screen at the same time, so that the brightness uniformity of the projected virtual image can be improved to more than 98%.

The second method is to obtain the virtual image brightness uniformity compensation coefficient DeMuraCoef directly through the DeMura technology after obtaining the virtual image brightness distribution, and apply the compensation coefficient to the NED display picture. After displaying the picture, the brightness uniformity of the NED virtual image can be improved to more than 95%.

For the two optical display devices of the NED device, namely the binoculars, the above operations are completed separately, and the brightness and chromaticity of the binoculars and their uniformity can be corrected to the same level, thereby achieving consistent compensation of the brightness and chromaticity of the binoculars and their uniformity.

In a more specific embodiment, the method for compensating for uniformity of brightness and chromaticity of a NED device provided by the present application specifically includes:

Step 1: Use an imaging brightness colorimeter with high-precision color reproduction capability and high resolution to test the brightness and chromaticity distribution of the entire field of view of the NED.

Step 2: Get the brightness distribution of the virtual image. Taking VR as an example, the virtual image formed by the VR display screen through the VR optical system is recorded as Pattern, and the image formed by Im1 through the NED detection equipment is recorded as Im2. A light source with a large field of view and uniformity is used as the calibration light source. The image of the calibration light source is taken by the NED detection equipment and recorded as I. The first flat field correction coefficient FFCCoef1=I0/I is obtained based on the central area response I0 of I. Then the real brightness distribution of the virtual image is Im2Cor=Im2*FFCCoef1.

Step 3: Generate the second flat field correction coefficient. Generate the second flat field correction coefficient FFCCoef2 = Im2CorCen/Im2Cor based on the center Im2CorCen of Im2Cor.

Step 4: Apply the second flat field correction coefficient. When applying the second flat field correction coefficient, we apply the coefficient to the image displayed on the VR display, and then test the brightness distribution of the compensated virtual image again.

Step 5: Generate brightness uniformity compensation coefficient DeMuraCoef1. When generating the brightness uniformity compensation coefficient, we use DeMura technology to obtain the brightness uniformity compensation coefficient DeMuraCoef1 based on the brightness distribution obtained in step 4.

Step 6: Apply the brightness uniformity compensation coefficient. When applying the brightness uniformity compensation coefficient, we apply the two coefficients FFCCoef2 and DeMuraCoef1 to the image displayed by the NED display at the same time.

Step 7: For binoculars, complete the above operations respectively, set the DeMura target values of the binoculars to be consistent, and correct the brightness and chromaticity of the binoculars and their uniformity to the same level, so as to achieve consistency compensation of the brightness and chromaticity of the binoculars and their uniformity. The above are the specific operation steps of this embodiment. Through this method, we can effectively improve the brightness uniformity of NED products and achieve binocular consistency, thereby improving user experience.

Due to the advanced nature of this technical solution, it can be widely used in application fields such as virtual reality equipment manufacturing, augmented reality equipment manufacturing, mixed reality equipment manufacturing, and optical measurement equipment manufacturing. First, this technical solution can effectively solve the problem of brightness uniformity in near-eye display devices and enhance the user's visual experience, which is of great significance to near-eye display device manufacturers. Secondly, this technical solution can also correct the vignetting of the NED optical system, which plays an important role in improving the performance of near-eye display devices. Finally, this technical solution can also be applied to optical measurement equipment to improve the accuracy and efficiency of measurement. Therefore, this technical solution has broad market demand and good application prospects.

FIG6 is a schematic diagram of a brightness and color uniformity adjustment system for a NED device provided in an embodiment of the present application; as shown in FIG6 , the system includes: a NED detection device 610, a processing unit 620, and a NED display adjustment unit 630;

The NED detection device 610 is used to capture an image displayed by the NED device to obtain a first captured image;

The processing unit 620 is configured to perform flat field correction on the first captured image using a first flat field correction coefficient to obtain a first corrected image, and determine a second flat field correction coefficient based on the first corrected image; the first flat field correction coefficient is obtained by performing flat field correction on the NED detection device using a large field uniform light source as a calibration light source;

The NED display adjustment unit 630 is configured to apply the second flat field correction coefficient to the picture displayed by the NED device to obtain a corrected display picture.

Optionally, the NED detection device 610 is further used to capture the display screen after the NED device has been calibrated again to obtain a second captured image;

The processing unit 620 is further configured to perform flat field correction on the second captured image using the first flat field correction coefficient to obtain a second corrected image;

The NED display adjustment unit 630 is used to perform DeMura on the display picture corrected by the NED device according to the second corrected image to obtain a repaired display picture.

FIG. 7 is another architecture diagram of a brightness and color uniformity adjustment system for a NED device provided in an embodiment of the present application; as shown in FIG. 7 , the system comprises: a NED detection device 710, a processing module 720, and a NED display adjustment module 730;

The NED detection device 710 is used to capture an image displayed by the NED device to obtain a first captured image;

The processing module 720 is used to perform flat field correction on the first captured image using a first flat field correction coefficient to obtain a first corrected image; the first flat field correction coefficient is obtained by performing flat field correction on the NED detection device using a large field uniform light source as a calibration light source;

The NED display adjustment module 730 is used to perform DeMura on the picture displayed by the NED device based on the first correction image to obtain a repaired display picture.

It should be understood that the system provided in Figures 6 and 7 above is used to execute the methods in the above embodiments. The implementation principles and technical effects of the corresponding hardware, program units and program modules in the system are similar to those described in the above methods. The working process of the system can refer to the corresponding process in the above methods and will not be repeated here.

Based on the method in the above embodiment, an embodiment of the present application provides an electronic device, as shown in FIG8 , the electronic device may include: a processor 810, a communication interface 820, a memory 830 and a communication bus 840, wherein the processor 810, the communication interface 820, and the memory 830 communicate with each other through the communication bus 840. The processor 810 may call the logic instructions in the memory 830 to execute the method in the above embodiment.

In addition, the logic instructions in the above-mentioned memory 830 can be implemented in the form of a software functional unit and can be stored in a computer-readable storage medium when it is sold or used as an independent product. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product, which is stored in a storage medium and includes a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present application.

Based on the method in the above embodiment, an embodiment of the present application provides a computer-readable storage medium, which stores a computer program. When the computer program runs on a processor, the processor executes the method in the above embodiment.

Based on the method in the above embodiment, an embodiment of the present application provides a computer program product. When the computer program product runs on a processor, the processor executes the method in the above embodiment.

It is understandable that the processor in the embodiment of the present application can be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application specific integrated circuits (ASIC), field programmable gate arrays (FPGA) or other programmable logic devices, transistor logic devices, hardware components or any combination thereof. The general-purpose processor can be a microprocessor or any conventional processor.

The method steps in the embodiments of the present application can be implemented by hardware or by a processor executing software instructions. The software instructions can be composed of corresponding software modules, and the software modules can be stored in random access memory (RAM), flash memory, read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), registers, hard disks, mobile hard disks, CD-ROMs, or any other form of storage medium known in the art. An exemplary storage medium is coupled to a processor so that the processor can read information from the storage medium and write information to the storage medium. Of course, the storage medium can also be a component of the processor. The processor and the storage medium can be located in an ASIC.

In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the process or function described in the embodiment of the present application is generated in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions may be stored in a computer-readable storage medium or transmitted through the computer-readable storage medium. The computer instructions may be transmitted from a website site, computer, server or data center to another website site, computer, server or data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium may be any available medium that a computer can access or a data storage device such as a server or data center that includes one or more available media integrated. The available medium may be a magnetic medium (e.g., a floppy disk, a hard disk, a tape), an optical medium (e.g., a DVD), or a semiconductor medium (e.g., a solid state disk (SSD)), etc.

It should be understood that the various numerical numbers involved in the embodiments of the present application are only used for the convenience of description and are not used to limit the scope of the embodiments of the present application.

It will be easily understood by those skilled in the art that the above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims (10)

1. A method for adjusting brightness uniformity of a near-eye display (NED) device, comprising: Obtaining a first flat field correction coefficient by performing flat field correction on the NED detection equipment using a large field uniform light source as a calibration light source; Acquire a first captured image obtained by capturing an image displayed by the NED device through the NED detection device; Performing flat-field correction on the first captured image using the first flat-field correction coefficient to obtain a first corrected image; A second flat field correction coefficient is determined based on the first corrected image, and the second flat field correction coefficient is applied to a picture displayed by the NED device to obtain a corrected display picture. 2. The method according to claim 1, characterized in that after obtaining the corrected display image, it also includes: Using the NED detection device to capture an image of the display screen corrected by the NED device again to obtain a second captured image; Performing flat field correction on the second captured image using the first flat field correction coefficient to obtain a second corrected image; DeMura is performed on the display picture corrected by the NED device according to the second corrected image to obtain a repaired display picture. 3. The method according to claim 1 or 2, characterized in that the first flat field correction coefficient is determined by the following steps: Acquire an image captured by the NED detection device on the large-field uniform light source to obtain a third captured image; A first flat field correction coefficient is obtained based on the response of the central area of the third captured image. 4. The method according to claim 1, characterized in that the second flat field correction coefficient is determined by the following steps: A second flat field correction coefficient is obtained based on the response of the central area of the first corrected image. 5. The method according to claim 1, characterized in that: The NED device includes two optical display systems, and the DeMura target values of the two optical display systems are the same. 6. A method for adjusting brightness uniformity of a near-eye display (NED) device, comprising: Obtaining a first flat field correction coefficient by performing flat field correction on the NED detection equipment using a large field uniform light source as a calibration light source; Acquire a first captured image obtained by capturing an image displayed by the NED device through the NED detection device; Performing flat-field correction on the first captured image using the first flat-field correction coefficient to obtain a first corrected image; DeMura is performed on the picture displayed by the NED device based on the first corrected image to obtain a repaired display picture. 7. A brightness and color uniformity adjustment system for a near-eye display (NED) device, characterized by comprising: a NED detection device, a processing unit, and a NED display adjustment unit; The NED detection device is used to capture an image displayed by the NED device to obtain a first captured image; The processing unit is used to perform flat field correction on the first captured image using a first flat field correction coefficient to obtain a first corrected image, and determine a second flat field correction coefficient based on the first corrected image; the first flat field correction coefficient is obtained by performing flat field correction on the NED detection equipment using a large field uniform light source as a calibration light source; The NED display adjustment unit is used to apply the second flat field correction coefficient to the picture displayed by the NED device to obtain a corrected display picture. 8. The system according to claim 7, characterized in that The NED detection device is further used to capture the display screen after the NED device has been calibrated again to obtain a second captured image; The processing unit is further configured to perform flat field correction on the second captured image using the first flat field correction coefficient to obtain a second corrected image; The NED display adjustment unit is used to perform DeMura on the display picture corrected by the NED device according to the second correction image to obtain a repaired display picture. 9. A brightness and color uniformity adjustment system for a near-eye display (NED) device, characterized by comprising: a NED detection device, a processing module, and a NED display adjustment module; The NED detection device is used to capture an image displayed by the NED device to obtain a first captured image; The processing module is used to perform flat field correction on the first captured image using a first flat field correction coefficient to obtain a first corrected image; the first flat field correction coefficient is obtained by performing flat field correction on the NED detection equipment using a large field uniform light source as a calibration light source; The NED display adjustment module is used to perform DeMura on the picture displayed by the NED device based on the first correction image to obtain a repaired display picture. 10. A NED device, characterized in that the NED device uses any one of claims 1 to 5 or the method of claim 6 to adjust brightness and chromaticity uniformity.