CN115880193A - Image processing method, image processing device, electronic equipment and storage medium - Google Patents

Abstract

The embodiment of the application provides an image processing method and device, electronic equipment and a storage medium, and relates to the technical field of projection. The method described in this embodiment is applied to a processor of a projection system, the projection system includes at least two projection components, and the method includes: acquiring a target projection image, and if the bit depth of the target projection image is higher than that of each projection component, determining a plurality of projection images to be projected corresponding to at least two projection components based on the target projection image so as to enable the sum of the display brightness of each projection image to be equal to that of the target projection image; and then, controlling each projection component to project each image to be projected corresponding to each projection component, and enabling a plurality of images to be projected to be displayed in a superposition mode, wherein each image to be projected corresponds to one projection component. The image with the bit depth higher than the projection assembly is divided into a plurality of images to be projected, and a plurality of projection assemblies are used for projection, so that the purpose of projecting the high bit depth image by using the projection assembly with lower bit depth can be achieved.

Description

Image processing method, device, electronic device and storage medium

technical field

The present application relates to the field of image processing, and more specifically, to an image processing method, device, electronic equipment, and storage medium.

Background technique

High-bit-depth images usually contain very fine image data, which can show users a richer and more realistic picture. However, high-bit-depth images have higher requirements on the performance of projection components, and low-bit-depth projection components cannot accurately project high-bit-depth images.

Contents of the invention

The present application proposes an image processing method, device, electronic equipment and storage medium to improve the above defects.

In the first aspect, an embodiment of the present application provides an image processing method, which is applied to a processor of a projection system, the projection system includes at least two projection components, and the method includes: acquiring a target projection image; if the target projection The bit depth of the image is higher than the bit depth of each of the projection components, and a plurality of images to be projected corresponding to the at least two projection components are determined based on the target projection image, so that each of the images to be projected The sum of the display brightness is equal to the display brightness of the target projected image; each of the projection components is controlled to project each of the images to be projected corresponding to each of the projection components, so that the multiple images to be projected are overlapped and displayed, Wherein, each of the images to be projected corresponds to one of the projection components.

In a second aspect, the embodiment of the present application also provides an image processing device, which is applied to a processor of a projection system, where the projection system includes at least two projection components, and the device includes: an acquisition module, a processing module, and a control module. An acquisition module, configured to acquire a target projection image; a processing module, configured to determine, based on the target projection image, the bit depth of the at least two projection components if the bit depth of the target projection image is higher than the bit depth of each of the projection components A plurality of images to be projected corresponding to the components, so that the sum of the display brightness of each of the images to be projected is equal to the display brightness of the target projected image; the control module is used to control the projection of each of the projection components and each For each of the images to be projected corresponding to the projection assembly, the multiple images to be projected are overlapped and displayed, wherein each image to be projected corresponds to one of the projection assemblies.

In the third aspect, the embodiment of the present application also provides an electronic device, including a processor and a memory, the memory stores a computer program, the processor invokes the computer program, and the processor invokes the computer The program performs the following operations: acquire the target projection image; if the bit depth of the target projection image is higher than the bit depth of each of the projection components, determine the multiple projection components corresponding to the at least two projection components based on the target projection image images to be projected, so that the sum of the display brightness of each of the images to be projected is equal to the display brightness of the target projected image; each of the projection components is controlled to project each of the projection components corresponding to each of the projection components The images to be projected are overlapped and displayed, wherein each image to be projected corresponds to one projection assembly.

In a fourth aspect, an embodiment of the present application further provides a projection system, the projection system includes a processor and at least two projection components, and the processor is configured to execute the above method.

In the fifth aspect, the embodiment of the present application also provides a computer-readable storage medium, where at least one instruction, at least one program, code set or instruction set is stored in the computer-readable storage medium, and the at least one instruction, all The at least one program, the code set or the instruction set is loaded and executed by the processor to realize the above method.

In the image processing method, device, electronic equipment, and storage medium provided in the embodiments of the present application, the target projection image is first obtained, and if the bit depth of the target projection image is higher than the bit depth of each of the projection components, based on the target The projected image determines a plurality of images to be projected corresponding to the at least two projection components, so that the sum of the display brightness of each of the images to be projected is equal to the display brightness of the target projected image. Then control each of the projection components to project each of the images to be projected corresponding to each of the projection components, so that the multiple images to be projected are overlapped and displayed, wherein each of the images to be projected corresponds to one of the projection components Projection components described above. In the present application, the image with a bit depth higher than that of the projection component is divided into multiple images to be projected, and multiple projection components are used for projection, so that the purpose of using a lower bit depth projection component to project a high bit depth image can be achieved.

Other features and advantages of the embodiments of the present application will be set forth in the following description, and partly become apparent from the description, or can be understood by implementing the embodiments of the present application. The objectives and other advantages of the embodiments of the application will be realized and attained by the structure particularly pointed out in the written description, claims hereof as well as the appended drawings.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings that need to be used in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application. For those skilled in the art, other drawings can also be obtained based on these drawings without any creative effort.

FIG. 1 shows a schematic diagram of a projection system provided by an embodiment of the present application;

FIG. 2 shows a method flowchart of an image processing method provided by an embodiment of the present application;

FIG. 3 shows a block diagram of a projection process of a projection system provided by another embodiment of the present application;

FIG. 4 shows a method flowchart of an image processing method provided in another embodiment of the present application;

FIG. 5 shows a method flowchart of an image processing method provided by another embodiment of the present application;

Fig. 6 shows a schematic diagram of brightness relationship of an image to be projected provided by an embodiment of the present application;

Fig. 7 shows a schematic diagram of pixel values of an image to be projected provided by another embodiment of the present application;

Fig. 8 shows a module block diagram of an image processing device provided by an embodiment of the present application;

FIG. 9 shows a structural block diagram of an electronic device provided by an embodiment of the present application;

FIG. 10 shows a structural block diagram of a computer-readable storage medium provided by an embodiment of the present application.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all of them. The components of the embodiments of the application generally described and illustrated in the figures herein may be arranged and designed in a variety of different configurations. Accordingly, the following detailed description of the embodiments of the application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of the application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making creative efforts belong to the scope of protection of the present application.

At present, the most common image bit depth is usually 8 bits, but in high bit depth images, the bit depth can be as high as 10 bits, 12 bits or 14 bits, etc., so high bit depth images can contain very fine image data and can be displayed The color levels are richer, which can show users a richer and more realistic picture, and the application of high-bit-depth images is becoming more and more extensive. In practical applications, low-bit-depth projection equipment can only display images with a certain bit-depth range due to hardware constraints, while high-bit-depth images have higher requirements for bit-depth projection components, and high-bit-depth projection components are relatively scarce, while low-bit-depth images have relatively high bit-depth requirements for projection components. Deep projection components cannot accurately project high bit depth images.

The inventor found in the research that it is possible to combine the bit-depth ranges of multiple lower-bit-depth projection components to achieve a higher-range bit-depth display by means of image overlap, so that the overlapped image seen by the human eye is presented with the original high-bit-depth image The same display effect can be achieved, and the purpose of projecting high-bit-depth images by using lower-bit-depth projection components can be achieved.

Therefore, in order to improve the above defects, the embodiment of the application provides an image processing method, device, electronic equipment, and storage medium. The execution subject of the method may be the image processing device provided in the embodiment of the application, or the Electronic equipment, projection equipment integrated with the image processing device, etc., the image processing device may be implemented in hardware or software. Wherein, the electronic device may be a device such as a tablet computer, a game console, an e-book reader, a multimedia playback device, a smart watch, a mobile phone, a PC (Personal Computer, personal computer), and the like. There are multiple application programs installed in the electronic device, and the user can use the multiple application programs to realize different functions and purposes.

Please refer to FIG. 1 , which shows a schematic diagram of a projection system provided by an embodiment of the present application. The projection system 100 includes the processor 110 and at least two projection components 120 described in the embodiment of the present application. In some embodiments, the processor 110 divides the obtained image into multiple images to be projected according to the performance of each projection component 120, and then sends the image to be projected to each projection component 120 and controls each projection component 120 for projection. Wherein, in order to overlap the multiple images to be projected seen by human eyes, the projection areas 130 of each projection assembly 120 displaying the images to be projected may also overlap. It can be understood that the projection system 100 can also include a projection screen, and each projection assembly 120 can project an image to be projected onto the projection screen, so that the projection area 130 of each projection assembly 120 can be overlapped on the projection screen.

Please refer to FIG. 2 , which shows a method flow chart of an image processing method provided by an embodiment of the present application. The image processing method can be applied to the processor 110 of the projection system 100 shown in FIG. 1 , for example, the projection system 100 includes at least two projection assemblies 120 . The method includes: step S210 to step S230.

Step S210: Obtain a target projection image.

In the embodiment of the present application, the projection of the image indicated by the projection instruction may be started according to the user's projection instruction. Wherein, firstly, the original image specified by the user for projection should be obtained, and the original image can be used as the target projection image to be processed. Wherein, the target projection images may be individual pictures, or may be video frames in a video stream. If the target projection image is an independent picture, the target projection image can be processed according to the order in which the pictures are transmitted to the processor in the embodiment of the application; if the target projection image is a video frame in a video stream, it can be processed according to The order in which the video frames are played in the video stream is used to process the target projected image. Optionally, in order to ensure that users can see continuous and smooth video images after projection, the projection component can also project the video in the order in which the video frames in the video stream are played. The image to be projected after frame processing.

In some implementations, the projected image of the target may come from an external device, and may also be stored in a memory inside the projection system. Wherein, the external device may be an electronic device such as a mobile phone or a PC (Personal Computer, personal computer), or may be an imaging device such as a camera or a video recorder. The processor can receive the target projection image transmitted by the external device or memory according to the user's projection instruction.

Step S220: If the bit depth of the target projection image is higher than the bit depth of each of the projection components, determine a plurality of images to be projected corresponding to the at least two projection components based on the target projection image, so that The sum of the display brightness of each of the images to be projected is equal to the display brightness of the target projected image.

As a method, if the bit depth of the target projection image is lower than or equal to that of any projection component in the projection system, then the projection component whose bit depth is higher than or equal to the target projection image can be directly used to project the target projection image. But in actual use, since the bit depth of high bit depth images is usually as high as 10 bits, 12 bits, 14 bits, etc., and the bit depth of projection components is usually lower than 10 bits, for example, most projection components have a bit depth of 8 bits, It is difficult to meet the high requirements of high bit depth images on the display performance of projection components. Therefore, in the embodiment of the present application, if the bit depth of the target projected image is higher than the bit depth of each projection component in the projection system, the target projected image can be divided into multiple images to be projected, wherein each image to be projected Corresponds to a projection component. Exemplarily, each image to be projected will be projected by a projection component in the projection system, therefore, the image to be projected can be determined according to the target projected image and the quantity and performance of all projection components in the projection system.

In some implementations, there may be a one-to-one correspondence between the projection components and the images to be projected. The determination of the projected image is related to the target projected image and the performance of the projecting component projecting the image to be projected. For example, if other performances except the bit depth are the same, if the bit depth of the projection component is higher, the corresponding projected image to be projected by the projection component can be closer to the target projected image.

In some other implementation manners, there may be a one-to-many relationship between the projection component and the image to be projected. For example, a projection component can project two images to be projected correspondingly, wherein the two images to be projected can be used as the main and backup images respectively, and the main image can be determined first according to the target projected image and the projection component that projects the two images to be projected Then confirm the backup image.

In addition, it can be understood that, in order to make the plurality of images to be projected projected by the projection system present a consistent display effect with the original target projection image, the display brightness of each image to be projected can also be adjusted. The sum is equal to the display brightness of the target projected image.

Step S230: Control each of the projection components to project each of the images to be projected corresponding to each of the projection components, so that the multiple images to be projected are overlapped and displayed, wherein each of the images to be projected corresponds to a Taiwan described projection assembly.

In the embodiment of the present application, after determining a plurality of images to be projected, the processor of the projection system will control each projection assembly to project each image to be projected corresponding to the projection assembly, and the multiple images to be projected will also be overlapped and displayed , so that the overlapping brightness of multiple images to be projected can be overlapped and displayed equal to the sum of the display brightness of each image to be projected, so that the overlapping brightness is equal to the display brightness of the target projection image, which is consistent with the original target projection image display effect.

In some embodiments, in addition to overlapping the projection areas of each projection assembly, it is also necessary to control each projection assembly to simultaneously project all the images to be projected, so that the images to be projected can be displayed in the same projection area at the same time, so that The effect of overlapping and displaying multiple images to be projected. Exemplarily, in order to realize synchronous projection, after determining a plurality of images to be projected, the processor may simultaneously send a synchronization signal and the images to be projected to corresponding projection components. Among them, if one projection component corresponds to projecting only one image to be projected, all projection components can be controlled to project the corresponding image to be projected in the same projection time through a synchronous signal; if one projection component corresponds to projecting two or more images to be projected When controlling the projection component, the high frequency of the projection component can be controlled to project the image to be projected, and the effect of synchronous projection can be realized by using the persistence of vision effect of human eyes. For example, when using the same projection assembly to project the first image to be projected and the second image to be projected, if the switching frequency of the two images to be projected is faster than the duration of vision, when the first image to be projected disappears, the switching frequency The second image to be projected will be displayed, and the human eyes can continue to retain the picture of the first image to be projected within the duration of vision, and since the projection areas of the first image to be projected and the second image to be projected overlap, the human eyes see The effect is that the two images overlap completely.

If the target projection image is a video frame in a video stream, in some typical embodiments, the projection component in the projection system can project multiple images to be projected corresponding to the same video frame at the same time, so that these images to be projected can be overlapped The displayed effect is that when the next video frame is played, multiple images to be projected corresponding to the next frame are simultaneously projected.

As shown in Figure 3, in some embodiments, one projection component in the projection system can be used as the main projection, and other projection components except the main projection can be used as auxiliary projections. The projection allocates different images to be projected, and then controls the main projection and the auxiliary projection to respectively project each image to be projected corresponding to the projection assembly, so that multiple images to be projected are overlapped and displayed. In particular, a projection component with the highest performance can be used as the main projection, such as the highest bit depth or the highest projection brightness, etc. Since the performance of the main projection is the highest, the image to be projected corresponding to the main projection can be closer to the target projection image, The maximum projection brightness and the like may be assigned to the image to be projected corresponding to the main projection. It should be understood that there may be one or more main projections in the projection system, for example, multiple projection components with higher performance and identical performance in the projection system may be used as the main projections; the main projection and the auxiliary projection may not be distinguished in the projection system, For example, if the performance of each projection component in the projection system is the same, the same image to be projected can be allocated to each projection component.

It can be understood that the target projection image described in the embodiment of the present application can not only be a high-bit-depth image, as long as the bit-depth of the target projection image is higher than the bit-depth of each projection component in the projection system, the target projection image described in the embodiment of the present application can be used. The method described above uses a plurality of projection components with a bit depth lower than that of the target projection image to project the target projection image. For example, if the bit depth of the target projection image is 8 bits, then at least two projection components with a bit depth of 4 bits can be used to project the target projection image.

To sum up, the embodiment of the present application provides a technical solution. First, the target projection image is obtained. If the bit depth of the target projection image is higher than the bit depth of each of the projection components, the target projection image will be determined based on the target projection image. a plurality of images to be projected corresponding to the at least two projection assemblies, so that the sum of the display brightness of each of the images to be projected is equal to the display brightness of the target projected image. Then control each of the projection components to project each of the images to be projected corresponding to each of the projection components, so that the multiple images to be projected are overlapped and displayed, wherein each of the images to be projected corresponds to one of the projection components Projection components described above. In the present application, the image with a bit depth higher than that of the projection component is divided into multiple images to be projected, and multiple projection components are used for projection, so that the purpose of using a lower bit depth projection component to project a high bit depth image can be achieved.

In some embodiments of the present application, if the bit depth of the target projection image is higher than the bit depth of each projection component in the projection system, the target projection image can be divided into multiple projection components according to the number and performance of the projection components in the projection system image. In some manners, the bit depth n of the target projected image needs to be smaller than the highest bit depth of the image that can be displayed by the projection system shown in the embodiment of the present application.

Wherein, the maximum bit depth of the image that the projection system can display can be calculated according to the maximum projection brightness and bit depth of each projection component in the projection system. Taking a projection system composed of projection components whose bit depths are all 8 bits as an example, the maximum and minimum bit depths of the projection system can be calculated. The highest projection luminance of k projection assemblies can be expressed as L1, L2, ..., Lk respectively, then the maximum projection luminance of the projection system can be L=L1+L2+...+Lk, wherein, if the kth projection assembly has the highest If the projection brightness is the largest, then the maximum bit depth of the projection system can be Mmax=log2((L1+L2+…+Lk)/(L1/256)), and the minimum bit depth can be Mnin=log2((L1+L2+… +Lk)/(Lk/256)). Further, the highest bit depth of the image that can be displayed by the projection system can be set between Mnin and Mmax (the value can be Mnin or Mmax). Furthermore, using a high bit depth for projection in actual use may accelerate the loss of the projection components, so the highest bit depth of the image that the projection system can display can be set as the minimum bit depth value Mnin=log2((L1+L2+... +Lk)/(Lk/256)).

In some embodiments, if the bit depth of the projected image of the target is higher than the bit depth of each projection component in the projection system, and is also smaller than the highest bit depth of the image that can be displayed by the projection system shown in the embodiment of the application, the target can be The projected image is divided into multiple images to be projected, wherein each image to be projected corresponds to a projection component.

Exemplarily, each image to be projected will be projected by a projection component in the projection system, therefore, the image to be projected can be determined according to the target projected image and the quantity and performance of all projection components in the projection system. Specifically, in some embodiments of the present application, referring to FIG. 4 , step S220 may include: step S410 to step S420.

Step S410: Obtain the brightness gradient value of each of the projection components and the brightness gradient value of the projection system.

In the embodiment of the present application, the determination of the display brightness of multiple images to be projected is related to the brightness step value of each projection assembly. In addition, the display brightness of the target projected image is related to the brightness step value of the projection system. Wherein, in some embodiments, the brightness step value of each projection component can be determined based on the highest projection brightness of the projection component and the bit depth of the projection component, while the brightness step value of the projection system can be determined based on the highest projection brightness of the projection system. Determined by the projection brightness and the bit depth of the target projected image. Referring to FIG. 5, step S410 may include: step S510 to step S530.

Step S510: Obtain the highest projection brightness of each projection component and the bit depth of each projection component.

In the embodiment of the present application, firstly, the highest projection brightness of each projection component in the projection system can be obtained.

As a method, the maximum projection brightness of each projection assembly is a fixed parameter, which may be based on the maximum projection brightness measured during the manufacture of the projection assembly. As another way, if the maximum projection brightness of the projection components is unknown, each projection component can be controlled to project at the highest brightness, and the maximum projection brightness of each projection component can be obtained by measuring the brightness of the projection area of each projection component . Optionally, the nine-point method can be used for brightness measurement. The specific measurement method can be: install the projection component to be measured at a position 2.4 meters away from the projection screen, control the projection component to be measured to project at the highest brightness, and use the illuminance Measure the illuminance of each point on the nine intersection points of the "Tian" shape of the projection screen, multiply the illuminance of each point by the area to get the brightness of the 9 points of the projection screen, and finally take the average of the brightness of the 9 points to get the projection The maximum projected brightness of the component.

In addition, in some implementation manners, the bit depth of each projection component will also be acquired.

Step S520: Determine the brightness gradient value of each projection assembly based on the highest projection brightness of each projection assembly and the bit depth of each projection assembly.

In the embodiment of the present application, the brightness step value of each projection assembly may be determined based on the highest projection brightness of each projection assembly and the bit depth of each projection assembly.

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Taking a certain projection component i in the projection system as an example, record the highest projection brightness of projection component i as L _i , record the bit depth of projection component i as ni _i , and take the bit depth of the target projected image as 10 bits as an example, Then n _i can be, for example, 8 bits, and L _i can be obtained by the method described in the above-mentioned embodiment. In some embodiments, the bit depth of the projection component can be used to represent the number of brightness steps that the projection component can project an image, then the brightness step value of the projection component represents the highest brightness value that each brightness step of the projection component can display, for example The bit depth _ni of projection component i can be understood as the projection component i has

brightness steps, then the brightness step value of projection component i can be />

Step S530: Determine the brightness gradient value of the projection system based on the highest projection brightness of the projection system and the bit depth of the target projection image.

In the embodiment of the present application, the brightness step value of the projection system may be determined based on the highest projection brightness of the projection system and the bit depth of the target projection image.

It can be seen from the foregoing embodiments that the projection areas of each projection unit in the projection system for displaying images to be projected can overlap, so the highest projection brightness that can be displayed by the projection system can be obtained according to the highest projection brightness of each projection unit. In some embodiments, the sum of the highest projection luminances of each projection assembly may be used as the maximum projection luminance of the projection system. For example, if there are k projection assemblies in the projection system, and the highest projection brightness of each projection assembly is L1, L2, ..., Lk respectively, then the maximum projection brightness of the projection system composed of the k projection assemblies can be L=L1 +L2+…+Lk.

Similar to the calculation method of the brightness step value of each projection component, if it is determined that the highest projection brightness of the projection system is L, and the bit depth of the target projected image is n, since the bit depth can be used to represent the number of brightness steps of the image, then the projection The brightness step value of the system can be understood as the highest brightness value that each brightness step of the entire projection system can display, that is, the brightness step value of the projection system can be divided by the highest projection brightness L of the projection system by the brightness step number 2^ of the target projected image n is obtained, that is, the brightness step value of the projection system can be L/2^n.

Step S420: Determine the display brightness of each image to be projected based on the display brightness of the target projected image, the brightness step value of the projection system, and the brightness step value of the projection component, wherein the target projected image's The display brightness is equal to the sum of the display brightness of each image to be projected.

In the embodiments of the present application, since the display brightness of the target projection image is equal to the sum of the display brightness of each of the images to be projected, and based on the meaning of the brightness step value (for example, the brightness step value of the projection system can be understood as the entire projection system The highest brightness value that can be displayed by each brightness step of each brightness step), and finally the display brightness of each image to be projected can be determined based on the display brightness of the target projected image, the brightness step value of the projection system and the brightness step value of the projection component.

Optionally, in order to better understand the calculation process of the display brightness of each image to be projected, the concept of pixel value will be introduced for explanation.

In this embodiment of the application, the pixel value can be used to represent the color depth of each pixel in the image. For example, the pixel value can be the grayscale value of the pixel point, or the grayscale value after gamma decoding The resulting grayscale brightness. It can be understood that the pixel value of each pixel in an image can determine a specific picture of an image.

In some embodiments, the display brightness of the target projection image is equal to the product of the brightness step value of the projection system and the pixel value of the target projection image, and at the same time, the display brightness of each image to be projected is equal to the brightness step value of each projection component and each The product of the pixel values of the projection components.

Exemplarily, the determination process of the display brightness of the target projection image will be described below by taking the gray scale brightness P of the pixel A on the target projection image as an example. The pixel value of the image can also be understood as the degree of lightness and darkness of the color, that is, the specific number of steps of the display brightness. Then the pixel value (take the gray scale brightness P as an example) is multiplied by the brightness step value of the projection system to get the target projection image in the projection. The display brightness of the pixel A in the system, for example, the display brightness of the pixel A may be P×L/2 ⁿ . Based on the above method, the display brightness of all pixels in the target projection image can be determined, and the display brightness of all pixels in the target projection image can be used as the display brightness of the target projection image.

In some embodiments, the pixel value of each pixel in the image to be projected can determine the display brightness of the image to be projected, and further determine the specific picture presented by the image to be projected. Therefore, to obtain the display brightness of the image to be projected by each projection component in the projection system, the pixel value of each pixel in each image to be projected can be determined first.

In the embodiment of the present application, the display brightness of the image to be projected by each projection component in the projection system can also be determined according to the pixel value of each pixel in the image to be projected and the brightness step value of the projection component, where To ensure that the overlapped image seen by human eyes presents a consistent display effect with the original target projection image, it should be satisfied that the display brightness of the target projection image is equal to the sum of the display brightness of each of the images to be projected. Based on this, in this embodiment, the pixel value of each pixel in the image to be projected by each projection assembly can be determined according to the display brightness of the target projection image and the brightness gradient value of the projection assembly.

In some embodiments, similar to the calculation method of the display brightness of the target projected image, for the pixel A' of the image j to be projected, where the pixel A' corresponds to the pixel A of the target projected image, the display brightness of the pixel A' can be It is obtained from the product of the grayscale brightness P _j of the pixel A' and the brightness gradient value of the projection component that projects the image to be projected. Taking k projection components and one projection component correspondingly projecting an image to be projected as an example, the display brightness of the target projection image needs to be consistent due to overlapping brightness, as shown in Figure 6, it can be concluded that the brightness relationship is: the display of the image to be projected 1 The sum of brightness 1, the display brightness 2 of the image to be projected 2, ..., the display brightness k of the image to be projected is equal to the display brightness of the target projected image, and the equation can be listed as follows:

P×L/2 ⁿ ＝P ₁ ×L ₁ /2 ⁿ¹ +P ₂ ×L ₂ /2 ⁿ² +…+P _k ×L _k /2 ^nk

It should be noted that P ₁ , P ₂ , ..., P _k respectively represent the grayscale brightness of each pixel A' of the image to be projected corresponding to the pixel A of the target projected image among the k images to be projected (wherein, pixel The value can represent the grayscale brightness obtained after gamma decoding), n1, n2, ..., nk respectively represent the bit depth of k projection components, L ₁ , L ₂ , ..., L _k represent the highest projection of k projection components brightness.

In some ways, since the pixel value is a positive integer, the brightness step value L ₁ /2 ⁿ¹ of the first projection component can be used as a divisor to obtain the projection component by moduloing the display brightness P×L/2 ⁿ of the target projection image The pixel value of the pixel A' of the image to be projected is gamma-decoded to obtain the gray-scale brightness P ₁ and the remainder T1. Then, the brightness step value L ₂ /2 ⁿ² of the second projection component can be used as the divisor to the remainder T1 Take the modulus to obtain the gray-scale brightness _P2 and the remainder T2 obtained after gamma decoding the pixel value of the pixel A' of the image to be projected by the projection component, and so on until the brightness step value L _k of the kth projection component is obtained /2 ^nk is used as a divisor to take the modulus of the remainder obtained from the last calculation to obtain the grayscale brightness P _k obtained by gamma decoding the pixel value of the pixel A' of the image to be projected by the projection component. Finally, the pixel value of the pixel A' of each image to be projected can be obtained from P ₁ , P ₂ , . . . , P _k respectively.

Based on the above method, the pixel value of each pixel in each image to be projected can be determined. In particular, each pixel in each to-be-projected image corresponds to a pixel in the target projected image.

In some embodiments, since the highest projection brightness and bit depth of each projection assembly are different, different calculation sequences of each projection assembly may result in different images to be projected. In some typical embodiments, the projection component with the largest brightness step value in the projection system can be used as the main projection, and the pixel value of each pixel in the image to be projected corresponding to the main projection is calculated first.

In some other embodiments, the pixel value of each pixel of the target projection image and the image to be projected may at least include pixel components of three color channels, and for each color channel of each image to be projected, it may be based on the The display brightness corresponding to the channel and the brightness gradient value of the image to be projected determine the pixel component of each color channel of each image to be projected. Taking the RGB color mode as an example for both the projected image and the image to be projected, the pixel values of the image can be divided into the first component of the red channel, the second component of the green channel and the third component of the blue channel in the RGB color mode.

It can be understood that the display brightness of the target projection image may include display brightness corresponding to each of the color channels, therefore, in the target projection image, the display brightness corresponding to each color channel may be equal to the display brightness of the projection system The product of the brightness step value and the pixel component corresponding to this color channel. Similarly, the display brightness of each image to be projected may also include the display brightness corresponding to each color channel, therefore, in each image to be projected, the display brightness corresponding to each color channel is equal to the brightness of each projection component The product of the step value and the pixel component corresponding to this color channel.

Still taking a certain pixel A of the target projected image as an example, as shown in FIG. The pixel A' of the projected image can get the following three brightness relations:

R×L/2 ⁿ ＝ R ₁ ×L ₁ /2 ⁿ¹ +R ₂ ×L ₂ /2 ⁿ² +…+R _k ×L _k /2 ^nk

G×L/2 ⁿ ＝G ₁ ×L ₁ /2 ⁿ¹ +G ₂ ×L ₂ /2 ⁿ² +…+G _k ×L _k /2 ^nk

B×L/2 ⁿ ＝B ₁ ×L ₁ /2 ⁿ¹ +B ₂ ×L ₂ /2 ⁿ² +…+B _k ×L _k /2 ^nk

Among them, R×L/2 ⁿ represents the display brightness of the red channel of the target projected image pixel A, G×L/2 ⁿ represents the display brightness of the green channel of the target projected image pixel A, B×L/2 ⁿ represents the target projected image pixel A The display brightness of the blue channel, R ₁ , R ₂ , ..., R _k respectively represent the gray scale brightness corresponding to the first component of pixel A' in each image to be projected, and G ₁ , G ₂ , ..., G _k represent respectively The gray scale brightness corresponding to the second component of pixel A' in each image to be projected, B ₁ , B ₂ , . . . , B _k represent the gray scale brightness corresponding to the third component of pixel A' in each image to be projected. Optionally, since the pixel value is a positive integer, the method in the above-mentioned embodiment can also be used to obtain the pixel A in each image to be projected by moduloing the display brightness corresponding to the three channels with the brightness step value of each projection component. 'The first component, the second component and the third component.

Likewise, based on the above method, the pixel value can be determined from the pixel component of each pixel in each image to be projected.

It can be understood that if the target projected image is different from the color mode or included color components of the projected component, for example, the target projected image is in RGB mode, and the projected component is in YUV mode, the color mode or included color components of the target projected image After calculating the pixel value of the image to be projected under the color mode or the color component, the pixel value of the image to be projected can also be converted into the color mode adopted by the projection component or the pixel value of the corresponding color component.

Through the embodiment of the present application, the pixel value of each pixel in each image to be projected can be calculated, and then the pixel value of each pixel in the image to be projected can be multiplied by the brightness step value to obtain the Display brightness of each image to be projected corresponding to the projection assembly. Exemplarily, the gray-scale brightness is still used as the pixel value for illustration. After obtaining the gray-scale brightness of pixel A in the image to be projected 1, the display brightness of pixel A can be expressed as the gray-scale brightness and the brightness gradient of the corresponding projection component The product of the values, the display brightness of the pixel point A can be, for example, P ₁ ×L ₁ /2 ⁿ¹ .

Based on the above method, the display brightness of all pixels in the image to be projected can be determined, and the display brightness of all pixels in the image to be projected can be used as the display brightness of the image to be projected.

In some implementations, the projection component can project images to be projected according to the display brightness of each image to be projected.

In some embodiments, before controlling the projection components to project the image to be projected, each projection component can also be subjected to overlap correction. After the overlap correction, corresponding pixels on all images to be projected that correspond to the same pixel on the target projection image , after being projected by each projection component, they all fall to the same point on the projection area, so that the projection areas of each projection component can overlap.

In some approaches, overlay correction can be done mechanically. Exemplarily, a fixed display area can be determined first, for example, the position of the projection screen can be used as the display area of each projection component, and then the position of each projection component can be moved sequentially, so that the projection area of each projection component can be accurately aligned with the display area. Alignment, that is, it can ensure that the projection areas of each projection component coincide. In other ways, overlay correction can be done digitally. For example, a fixed display area can be determined first, and then the projection area of each projection component can be adjusted to completely cover the display area, and then the projection area and the display area can be accurately aligned using four-point calibration or eight-point calibration. allow. In some typical embodiments, the above two calibration methods can be used at the same time, for example, a mechanical method is used for rough adjustment first, and then a digital method is used for fine adjustment.

Optionally, if the lens of the projection assembly has large distortion, the distortion can also be corrected. For example, project a checkerboard or other images on a flat projection screen, use a calibrated camera or measuring instrument to take pictures to obtain the pixel distortion of the checkerboard or other images, and analyze the checkerboard or other images according to the pixel distortion. The image is corrected.

In the embodiment of the present application, after overlapping correction, the method of controlling the projection component to project the image to be projected can refer to the content described in the foregoing embodiments. After projection, multiple images to be projected will overlap and display, and satisfy multiple requirements The overlapping brightness obtained by overlapping the projection images is consistent with the display brightness of the target projection image of the target projection image, so that the overlapping image seen by human eyes and the original target projection image can present a consistent display effect.

To sum up, the embodiment of the present application provides a technical solution, first obtain the target projection image, then obtain the maximum projection brightness and bit depth of the projection components, and then obtain the maximum projection brightness of the projection system based on the maximum projection brightness of each projection component. Then, the display brightness of the target projection image is determined according to the highest projection brightness of the projection system, the bit depth of the target projection image, and the pixel value of each pixel in the target projection image. If the bit depth of the target projection image is higher than the bit depth of each of the projection components, the highest projection brightness of each of the projection components will also be obtained, and then based on the highest projection brightness of each projection component, each projection component The bit depth determines the brightness step value of each projection component, and determines the pixel of each pixel in each image to be projected corresponding to each projection component based on the display brightness of the target projection image and the brightness step value of each projection component value. Then, based on the pixel value of each pixel in each image to be projected and the corresponding brightness step value, the display brightness of each image to be projected corresponding to each projection component can be obtained, and finally the projection component is controlled to project at the display brightness For each image to be projected corresponding to each projection assembly, multiple images to be projected are overlapped and displayed, so that the sum of the display brightness of each image to be projected is equal to the display brightness of the target projected image. In this application, by dividing the image with a bit depth higher than that of the projection component into multiple images to be projected, and using multiple projection components for projection, the purpose of using a lower bit depth projection component to project a high bit depth image can be achieved. Coincident projection also expands the projected brightness range of the entire projection system.

Please refer to FIG. 8 , which shows a block diagram of modules of an image processing device provided by an embodiment of the present application. Specifically, the image processing device is applied to a processor of a projection system, and the projection system includes at least two projection components, and the device includes: an acquisition module 810 , a processing module 820 and a control module 830 .

An acquisition module 810, configured to acquire a target projection image; a processing module 820, configured to determine, based on the target projection image, the at least two A plurality of images to be projected corresponding to the projecting components of each station, so that the sum of the display brightness of each of the images to be projected is equal to the display brightness of the target projected image; the control module 830 is used to control the projection of each of the projection components For each of the images to be projected corresponding to each of the projection components, the plurality of images to be projected are overlapped and displayed, wherein each of the images to be projected corresponds to one of the projection components.

Optionally, the above-mentioned processing module 820 may include: a brightness step acquisition module, configured to obtain the brightness step value of each projection component and the brightness step value of the projection system; a display brightness determination module, configured to obtain the brightness step value based on the target The display brightness of the projected image, the brightness step value of the projection system and the brightness step value of the projection component determine the display brightness of each of the images to be projected, wherein the display brightness of the target projected image is equal to each of the The sum of the display brightness of the image to be projected.

Further, the display brightness of the target projection image is equal to the product of the brightness gradient value of the projection system and the pixel value of the target projection image, and the display brightness of each to-be-projected image is equal to the brightness of each projection component. The product of the brightness step value and the pixel value of each of the projection components.

In some implementations, the brightness step acquisition module may include: a component acquisition module, configured to acquire the highest projection brightness of each projection component, and the bit depth of each projection component; a first determination module, configured to obtain the highest projection brightness of each projection component; The highest projection brightness of each of the projection components and the bit depth of each of the projection components determine the brightness step value of each of the projection components; the second determination module is used to determine the highest projection based on the projection system The brightness and the bit depth of the target projection image determine the brightness step value of the projection system.

Optionally, the maximum projection brightness of the projection system is equal to the sum of the maximum projection brightness of each of the projection components.

In some implementations, the pixel values of each of the images to be projected include pixel components of at least three color channels, and the display brightness of each of the images to be projected includes display brightness corresponding to each of the color channels . Based on this, in each image to be projected, the display brightness corresponding to each color channel is equal to the product of the brightness step value of each projection assembly and the pixel component corresponding to the color channel.

In other embodiments, the pixel values of the target projection image include at least pixel components of three color channels, and the display brightness of the target projection image includes display brightness corresponding to each of the color channels. In the target projection image, the display brightness corresponding to each color channel is equal to the product of the brightness gradient value of the projection system and the pixel component corresponding to the color channel.

Optionally, the above-mentioned image processing device may further include: a correction module, configured to perform overlap correction on each of the projection components, so that the projection areas of each of the projection components coincide.

Optionally, the above-mentioned component acquisition module may include: a measurement module, configured to control each of the projection components to project with the highest brightness, and obtain the brightness of each projection component by measuring the brightness of the projection area of each of the projection components. The maximum projected brightness of the component.

Those skilled in the art can clearly understand that for the convenience and brevity of the description, the specific working process of the above-described devices and modules can refer to the corresponding process in the foregoing method embodiments, which will not be repeated here.

Please refer to FIG. 9 , which shows a structural block diagram of an electronic device provided by an embodiment of the present application. Specifically, the electronic device has one or more components as follows: a processor 910 , a memory 920 and one or more application programs. One or more application programs may be stored in the memory 920 and configured to be executed by the one or more processors 910, and the one or more application programs are configured to perform the methods described in the foregoing method embodiments.

The electronic device may be any of various types of computer system devices that are mobile, portable, and perform wireless communications. Specifically, the electronic device can be a mobile phone or a smart phone (for example, based on iPhone TM, a phone based on Android TM), a portable game device (such as Nintendo DS TM, PlayStation Portable TM, Gameboy Advance TM, iPhone TM), a laptop Computers, PDAs, portable Internet devices, music players, data storage devices, and projection devices integrating the image processing device described in this application, etc., other handheld devices and electronic devices such as smart watches, smart bracelets, earphones, pendants, etc. It can also be other wearable devices (for example, such as electronic glasses, electronic clothes, electronic bracelets, electronic necklaces, electronic tattoos, electronic devices or head-mounted devices (HMD)).

The electronic device may also be any of a number of electronic devices including, but not limited to, cellular phones, smart phones, smart watches, smart bracelets, other wireless communication devices, personal digital assistants, audio players, other media Players, Music Recorders, Video Recorders, Cameras, Other Media Recorders, Radios, Medical Equipment, Vehicle Transportation Instruments, Calculators, Programmable Remote Controls, Pagers, Laptop Computers, Desktop Computers, Printers, Netbook Computers, Personal Digital Assistants (PDAs), Portable Multimedia Players (PMPs), Moving Picture Experts Group (MPEG-1 or MPEG-2) Audio Layer 3 (MP3) players, Portable Medical Devices, Projection Devices, and Digital Cameras and combinations thereof.

In some cases, an electronic device can perform multiple functions (eg, play music, display video, store pictures, and receive and send phone calls). If desired, the electronic device may be a device such as a cellular phone, media player, other handheld device, wrist watch device, pendant device, earpiece device, or other compact portable device.

Processor 910 may include one or more processing cores. The processor 910 uses various interfaces and lines to connect various parts of the entire electronic device, and executes or executes instructions, application programs, code sets or instruction sets stored in the memory 920, and calls data stored in the memory 920 to execute Various functions and processing data of electronic devices. Optionally, the processor 910 may use at least one of Digital Signal Processing (Digital Signal Processing, DSP), Field-Programmable Gate Array (Field-Programmable Gate Array, FPGA), and Programmable Logic Array (Programmable LogicArray, PLA). implemented in the form of hardware. The processor 910 may integrate one or a combination of a central processing unit (Central Processing Unit, CPU), an image processor (Graphics Processing Unit, GPU), a modem, and the like. Among them, the CPU mainly handles the operating system, user interface and application programs, etc.; the GPU is used to render and draw the displayed content; the modem is used to handle wireless communication. It can be understood that, the above-mentioned modem may not be integrated into the processor 910, but may be realized by a communication chip alone.

The memory 920 may include a random access memory (Random Access Memory, RAM), and may also include a read-only memory (Read-Only Memory). Memory 920 may be used to store instructions, applications, codes, sets of codes, or sets of instructions. The memory 920 may include a program storage area and a data storage area, wherein the program storage area may store instructions for implementing an operating system and instructions for implementing at least one function (such as a touch function, a sound playback function, an image playback function, etc.) , used to acquire the target projection image, if the bit depth of the target projection image is higher than the bit depth of each of the projection components, a plurality of projection components corresponding to the at least two projection components will be determined based on the target projection image The image to be projected, so that the sum of the display brightness of each of the images to be projected is equal to the display brightness of the target projected image, and then each of the projection components is controlled to project each of the projection components corresponding to each of the projection components. The images to be projected are overlapped and displayed, wherein each image to be projected corresponds to one projection assembly. The storage data area can also store data (such as phone book, audio and video data, and chat record data) created by the electronic device during use.

Those skilled in the art can clearly understand that for the convenience and brevity of the description, the specific working process of the processor 910 and the memory 920 of the electronic device described above can refer to the corresponding process in the foregoing method embodiment, which is not repeated here. repeat.

It should be noted that those skilled in the art can understand that all or part of the steps in the various methods of the above-mentioned embodiments can be completed by instructing related hardware through a computer program, and the computer program can be stored in a computer-readable storage medium In this example, the storage medium may include but not limited to: a read only memory (ROM, Read Only Memory), a random access memory (RAM, Random Access Memory), a magnetic disk or an optical disk, and the like.

Please refer to FIG. 10 , which shows a structural block diagram of a computer-readable storage medium provided by an embodiment of the present application. Program code 1010 is stored in the computer-readable storage medium 1000, and the program code can be invoked by a processor to execute the image processing method described in the foregoing method embodiments.

The computer readable storage medium 1000 may be an electronic memory such as flash memory, EEPROM (Electrically Erasable Programmable Read Only Memory), EPROM, hard disk, or ROM. Optionally, the computer-readable storage medium 1000 includes a non-transitory computer-readable storage medium (non-transitory computer-readable storage medium). The computer-readable storage medium 1000 has a storage space for program code 1010 for executing any method steps in the above methods. These program codes can be read from or written into one or more computer program products. Program code 1010 may, for example, be compressed in a suitable form.

It should be understood that each part of the present application may be realized by hardware, software, firmware or a combination thereof. In the embodiments described above, various steps or methods may be implemented by software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, it can be implemented by any one or combination of the following techniques known in the art: Discrete logic circuits, ASICs with suitable combinational logic gates, programmable gate arrays (PGAs), field programmable gate arrays (FPGAs), etc.

Those of ordinary skill in the art can understand that all or part of the steps carried by the methods of the above embodiments can be completed by instructing related hardware through a program, and the program can be stored in a computer-readable storage medium. During execution, one or a combination of the steps of the method embodiments is included. In addition, each functional unit in each embodiment of the present application may be integrated into one processing module, each unit may exist separately physically, or two or more units may be integrated into one module. The above-mentioned integrated modules can be implemented in the form of hardware or in the form of software function modules. If the integrated modules are realized in the form of software function modules and sold or used as independent products, they can also be stored in a computer-readable storage medium.

Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limitations on the present application, and those skilled in the art can make the above-mentioned The embodiments are subject to changes, modifications, substitutions and variations.

The terms "first" and "second" in the description and claims of the embodiments of the present invention are used to distinguish different objects, rather than to describe a specific sequence of objects. For example, the first area, the second area, etc. are used to distinguish different areas, not to describe a specific order of the areas. In the description of the embodiments of the present invention, unless otherwise specified, "plurality" means two or more.

The term "and/or" in this article is an association relationship describing associated objects, which means that there can be three relationships, for example, A and/or B can mean: A exists alone, A and B exist simultaneously, and B exists alone These three situations. The symbol "/" in this document indicates that the associated object is an or relationship, for example, A/B indicates A or B.

In the embodiments of the present invention, words such as "exemplary" or "for example" are used as examples, illustrations or illustrations. Any embodiment or design solution described as "exemplary" or "for example" in the embodiments of the present invention shall not be construed as being more preferred or more advantageous than other embodiments or design solutions. Rather, the use of words such as "exemplary" or "such as" is intended to present related concepts in a concrete manner.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art will understand that: they can still modify the technical solutions described in the aforementioned embodiments, or perform equivalent replacements for some of the technical features; and these The modification or replacement does not drive the essence of the corresponding technical solutions away from the spirit and scope of the technical solutions of the various embodiments of the present application.

Claims (13)

1. An image processing method, characterized in that it is applied to a processor of a projection system, the projection system comprising at least two projection assemblies, the method comprising: Obtain the target projection image; If the bit depth of the target projection image is higher than the bit depth of each of the projection components, a plurality of images to be projected corresponding to the at least two projection components are determined based on the target projection image, so that each of the projection components The sum of the display brightness of the images to be projected is equal to the display brightness of the target projected image; controlling each of the projection components to project each of the images to be projected corresponding to each of the projection components, so that the multiple images to be projected are overlapped and displayed, wherein each of the images to be projected corresponds to one of the Projection components. 2. The method according to claim 1, wherein the determining a plurality of images to be projected corresponding to the at least two projection components based on the target projection image comprises: Acquiring the brightness step value of each of the projection components and the brightness step value of the projection system; The display brightness of each image to be projected is determined based on the display brightness of the target projected image, the brightness step value of the projection system, and the brightness step value of the projection component, wherein the display brightness of the target projected image is equal to The sum of the display brightness of each of the images to be projected. 3. The method of claim 2, wherein, The display brightness of the target projection image is equal to the product of the brightness step value of the projection system and the pixel value of the target projection image; The display brightness of each image to be projected is equal to the product of the brightness step value of each projection assembly and the pixel value of each projection assembly. 4. The method according to claim 2, wherein the acquiring the brightness step value of each projection assembly and the brightness step value of the projection system comprises: Obtain the highest projection brightness of each projection component and the bit depth of each projection component; Determine the brightness step value of each projection assembly based on the highest projection brightness of each projection assembly and the bit depth of each projection assembly; The brightness step value of the projection system is determined based on the highest projection brightness of the projection system and the bit depth of the target projection image. 5. The method according to claim 4, wherein the maximum projection brightness of the projection system is equal to the sum of the maximum projection brightness of each of the projection components. 6. The method according to claim 3, wherein the pixel values of each of the images to be projected include at least three color channel pixel components, and the display brightness of each of the images to be projected includes each The display brightness corresponding to the color channel, the display brightness of each of the images to be projected is equal to the product of the brightness step value of each of the projection components and the pixel value of each of the projection components, including: In each image to be projected, the display brightness corresponding to each color channel is equal to the product of the brightness step value of each projection assembly and the pixel component corresponding to the color channel. 7. The method according to claim 3, wherein the pixel values of the target projected image include pixel components of at least three color channels, and the display brightness of the target projected image includes pixels corresponding to each of the color channels. The corresponding display brightness, the display brightness of the target projection image is equal to the product of the brightness step value of the projection system and the pixel value of the target projection image, including: In the target projection image, the display brightness corresponding to each color channel is equal to the product of the brightness gradient value of the projection system and the pixel component corresponding to the color channel. 8. The method according to claim 1, wherein the controlling each of the projection components to project each of the images to be projected corresponding to each of the projection components, so that the multiple images to be projected overlap Before showing, also include: Overlap correction is performed on each of the projection components so that the projection areas of each of the projection components coincide. 9. The method according to claim 4, wherein said acquiring the highest projection brightness of each said projection assembly comprises: Each of the projection components is controlled to project with the highest brightness, and the highest projection brightness of each of the projection components is obtained by measuring the brightness of the projection area of each of the projection components. 10. An image processing device, characterized in that it is applied to a processor of a projection system, the projection system includes at least two projection components, and the device includes: An acquisition module, configured to acquire a target projection image; A processing module, configured to determine a plurality of images to be projected corresponding to the at least two projection components based on the target projection image if the bit depth of the target projection image is higher than the bit depth of each of the projection components, making the sum of the display brightness of each of the images to be projected equal to the display brightness of the target projected image; A control module, configured to control each of the projection components to project each of the images to be projected corresponding to each of the projection components, so that the multiple images to be projected are overlapped and displayed, wherein each of the images to be projected Corresponding to one projection assembly. 11. An electronic device, characterized in that it comprises a processor and a memory, the memory stores a computer program, and the processor is used to execute the computer program described in any one of claims 1 to 9 by invoking the computer program. image processing method. 12. A projection system, characterized in that the projection system comprises a processor and at least two projection components, and the processor is used to execute the method according to any one of claims 1 to 9. 13. A computer-readable storage medium, characterized in that at least one instruction, at least one section of program, code set or instruction set is stored in the computer-readable storage medium, and the at least one instruction, the at least one section of program, The code set or instruction set is loaded and executed by a processor to implement the method according to any one of claims 1-9.

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