CN108428435A - A kind of verification display methods that Delta types arrangement sub-pixel renders - Google Patents

Abstract

The invention discloses a method for verifying and displaying delta-type sub-pixel rendering. The steps include: 1. performing sub-pixel rendering processing on an original image with a pixel size of P×Q to obtain an RGB gray value matrix of the sub-pixel; 2. using The RGB gray value matrix is rearranged according to the arrangement order of the Delta type sub pixels by means of sub-pixels on the left and right to obtain a Delta type RGB gray value matrix with a pixel size of P×2Q; 3. The pixel size P×2Q The 2Q Delta RGB gray value matrix is restored to a Delta image with a pixel size of P×2Q, and the original image and the Delta image are compared and displayed to complete the verification. The present invention can use a standard RGB screen to display sub-pixel rendering processed pictures, so that the feasibility of the sub-pixel rendering algorithm for display panel arrangement can be well verified.

Description

A Verification Display Method for Delta Arrangement Sub-pixel Rendering

technical field

The present invention relates to the field of image processing and display technology, more specifically to a display method for standard RGB screen verification sub-pixel rendering technology.

technical background

Displays are widely used, and display devices can be seen in electronic devices used by human beings in daily life. Conventional liquid crystal displays and OLED displays consist of two-dimensional arrays of pixels. Each pixel includes sub-pixels arranged in a certain order. The colors of the sub-pixels include red (R), green (G), blue (B) and the like. The sub-pixel colors of each pixel are mixed to display the color of the pixel, thereby displaying a color image on the display device.

In today's display field, the sub-pixel arrangement of the display panel has changed. Taking the AMOLED screen as an example, the sub-pixel arrangement order of the display panel is no longer the traditional R, G, B order. Common sub-pixel arrangements include Pentile type and Delta type. Some display manufacturers have displays with proprietary subpixel orderings. There are various sub-pixel arrangements in this kind of non-traditional RGB-arranged display, which requires the study of conversion algorithms from RGB to other pixel structures. A new pixel arrangement must have a subpixel rendering method.

Sub-pixel rendering technology is generally applied to driver ICs of displays with non-traditional sub-pixel arrangements. In the early stage of the engineering project, the pictures with the new sub-pixel arrangement could not be displayed using traditional standard RGB display devices. The verification of sub-pixel rendering technology has become a problem in the early stage of the project, but no relevant solution has been found so far.

Contents of the invention

In order to solve the problem that sub-pixel data after sub-pixel rendering processing cannot be displayed on a standard RGB display screen, the present invention provides a verification display method for sub-pixel rendering of a Delta type arrangement, in order to use an RGB display screen to display sub-pixel rendering processing After the picture, the feasibility of the sub-pixel rendering algorithm for the display panel arrangement can be well verified.

The present invention adopts following technical scheme for solving technical problems:

The characteristic of the verification display method of a kind of Delta type arrangement sub-pixel rendering of the present invention is to carry out according to the following steps:

Step 1, perform sub-pixel rendering processing on the original image with a pixel size of P×Q, and obtain the RGB gray value matrix of the sub-pixel;

Step 2. Rearranging the RGB gray value matrix according to the arrangement order of the Delta-type sub-pixels by borrowing sub-pixels from left and right to obtain a Delta-type RGB gray-value matrix with a pixel size of P×2Q;

The arrangement order of the Delta-type sub-pixels is: in the arrangement structure of M×N sub-pixels, any sub-pixel in row i and column j, sub-pixel in row i+1 and column j+1, and sub-pixel in row i+2 The sub-pixels in the j-th column and the sub-pixels in the i+3th row and j+1th column have the same color, i=1,2,...,M-3, j=1,2,...,N-1;

Step 3: Restore the Delta-type RGB gray value matrix with a pixel size of P×2Q to a Delta-type image with a pixel size of P×2Q, and compare and display the original image and the Delta-type image to complete the verification.

The verification display method of the delta arrangement sub-pixel rendering of the present invention is also characterized in that the way of borrowing the left and right sub-pixels in the step 2 is as follows:

Step 2.1, construct any pixel in the even-numbered row in the RGB gray-scale value matrix as a pixel block composed of two pixels in the corresponding even-numbered row in the Delta-type RGB gray-scale value matrix, so that the first pixel in the pixel block The grayscale value of the R subpixel of a pixel and the grayscale value of the G subpixel are filled with 0 or 255, while the grayscale value of the B subpixel remains unchanged; make the second pixel in the pixel block The gray value of the R sub-pixel and the gray value of the G sub-pixel remain unchanged, and the gray value of the B sub-pixel is filled with 0 or 255; and in the even-numbered rows of the Delta-type RGB gray value matrix, make The gray value of the B sub-pixel of the second pixel point of the previous pixel block in any two adjacent pixel blocks and the gray value of the R sub-pixel and the G sub-pixel of the first pixel point of the next pixel block The grayscale values are all 0 or 255;

Step 2.2, construct any pixel in the odd-numbered row in the RGB gray-scale value matrix as a pixel block composed of two pixels in the corresponding odd-numbered row in the Delta-type RGB gray-scale value matrix, so that the first pixel in the pixel block The gray value of the R sub-pixel of a pixel, the gray value of the G sub-pixel and the B sub-pixel are all filled with 0 or 255, so that the gray value of the R sub-pixel of the second pixel in the pixel block , the gray value of the G sub-pixel and the gray value of the B sub-pixel remain unchanged.

Compared with the prior art, the beneficial effects and advantages of the present invention are:

1. In the present invention, the delta-type sub-pixel arrangement structure is generally a sub-pixel arrangement method of a new display panel. However, the present invention realizes the arrangement order of the sub-pixels on the new display panel by rearranging and expanding the pixel point data of the traditional RGB, and borrowing the sub-pixels of the adjacent pixels for the sub-pixel gray value data rendered by the sub-pixels. . Use the sub-pixels of the traditional RGB display to simulate the sub-pixel arrangement of the new display panel, so that the image data of the new panel can be displayed by using the standard RGB display in the early stage of the project, and the display effect of the new display panel can be approximated.

2. Sub-pixel rendering technology is generally applied to driver ICs of non-traditional sub-pixel arrangement displays. In the design stage of the driver chip, it is impossible to test whether a sub-pixel rendering technology solution is suitable for the new panel, and it is impossible to display pictures of the new sub-pixel arrangement using traditional standard RGB display devices. However, the present invention provides a verification display method for sub-pixel rendering of a Delta type arrangement, which can use an RGB display to display a sub-pixel rendering-processed picture, thereby being able to well verify the feasibility of the sub-pixel rendering algorithm for display panel arrangement .

3. The gray value data 255 inserted in the present invention can effectively improve the restoration degree of the picture. At the same time, the comparison and verification of the rendering algorithm, the data after sub-pixel rendering and the newly restored pictures can be used to test the feasibility of the sub-pixel rendering algorithm for the display panel arrangement.

Description of drawings

FIG. 1 is a schematic diagram of a sub-pixel arrangement structure of a standard RGB display screen.

FIG. 2 is a schematic diagram of a display panel adopting a delta-type sub-pixel arrangement structure.

Fig. 3 is a schematic diagram of a display flow provided by an embodiment of the present invention.

Fig. 4a is a schematic diagram of main expansion of odd-numbered rows realized by the present invention.

Fig. 4b is a schematic diagram of main expansion of even-numbered rows realized by the present invention.

Fig. 4c is a schematic diagram of main extensions realized by the present invention.

Fig. 5a is an original picture used by an embodiment of the present invention.

Fig. 5b is an experimental result obtained by an embodiment of the present invention.

Detailed ways

Referring to FIG. 1 , FIG. 1 is a schematic diagram of a sub-pixel arrangement structure of a standard RGB display screen. In the standard RGB sub-pixel arrangement structure, red sub-pixels (R), green sub-pixels (G), and blue sub-pixels (B) are arranged in sequence, and the arrangement order of the sub-pixels in each row is the same.

Referring to FIG. 2 , FIG. 2 is a schematic diagram of a display panel adopting a delta-type sub-pixel arrangement structure. In the Delta-type sub-pixel arrangement structure, red sub-pixels (R), green sub-pixels (G), and blue sub-pixels (B) are arranged in a specific order. The arrangement order of Delta-type sub-pixels is: in the arrangement structure of M×N sub-pixels, any sub-pixel in row i and column j, sub-pixel in row i+1 and column j+1, and sub-pixel in row i+2 and column j The sub-pixels in the column and the sub-pixels in the i+3th row and the j+1th column have the same color, i=1, 2,..., M-3, j=1, 2,..., N-1; the sub-pixels of the odd-numbered rows are arranged The order is the same, and the subpixels of even rows are arranged in the same way.

Referring to FIG. 3 , FIG. 3 is a schematic flowchart of a method for verifying and displaying delta-arranged sub-pixel rendering provided in this embodiment. The display method mainly includes the following steps:

Step 1. Start and input an original frame image, perform sub-pixel rendering processing on the original image with a pixel size of P×Q, and obtain the RGB gray value matrix of the sub-pixel. Use MATLAB or other tools to store the sub-pixel gray value processed by sub-pixel rendering technology in the form of matrix or file table;

Step 2. On the standard RGB sub-pixel structure, use the method of borrowing sub-pixels from left and right to rearrange the RGB gray-scale value matrix according to the arrangement order of the Delta-type sub-pixels, and obtain a Delta-type RGB gray-scale value with a pixel size of P×2Q matrix, and use the gray value data 0 or 255 to fill the unborrowed sub-pixel gray value;

The specific borrowing method is: construct any pixel in the even-numbered row in the RGB gray-scale value matrix as a pixel block composed of two pixels in the corresponding even-numbered row in the Delta-type RGB gray-scale value matrix, so that the first pixel in the pixel block The gray value of the R sub-pixel and the gray value of the G sub-pixel of a pixel are filled with 0 or 255, while the gray value of the B sub-pixel remains unchanged; make the R sub-pixel of the second pixel in the pixel block The gray value of the gray value and the gray value of the G sub-pixel remain unchanged, while the gray value of the B sub-pixel is filled with 0 or 255; and in the even-numbered rows of the Delta-type RGB gray value matrix, any two adjacent The gray value of the B sub-pixel of the second pixel of the previous pixel block in the pixel block and the gray value of the R sub-pixel and the gray value of the G sub-pixel of the first pixel of the next pixel block are both 0 or 255;

Construct any pixel in the odd-numbered row in the RGB gray-scale value matrix as a pixel block consisting of two pixels in the corresponding odd-numbered row in the Delta-type RGB gray-scale value matrix. The gray value of the pixel, the gray value of the G sub-pixel and the B sub-pixel are all filled with 0 or 255, so that the gray value of the R sub-pixel of the second pixel in the pixel block, the gray value of the G sub-pixel and The gray value of the B subpixel remains unchanged.

The Delta-type sub-pixel arrangement structure is a non-standard RGB sub-pixel arrangement structure that needs to perform sub-pixel rendering processing on image RGB data. Keep the order the same while rearranging the number of subpixels. The way to construct the sub-pixel arrangement order of the new display panel is by borrowing the color sub-pixel from the adjacent pixel. The sub-pixel data of the original pixel that is not borrowed is filled with the sub-pixel gray value 0 or 255. During the expansion process, when the number of sub-pixels to be continuously filled is greater than 3, data 255 is used to replace data 0, so as to add a white pixel to improve the brightness of the restored image.

Step 3: Restore the RGB gray value matrix of the pixel size P×2Q Delta type to a Delta type image of the pixel size P×2Q, and compare and display the original image and the Delta type image to complete the verification.

As shown in FIG. 4a, FIG. 4a is an extended schematic diagram of odd-numbered rows of a Delta-type sub-pixel arrangement structure. Pixel 1 and pixel 3 in the figure are pixels before expansion, and each pixel includes three sub-pixels. Pixel block 2 and pixel block 4 in the figure are expanded pixel blocks, and each pixel block contains two complete standard RGB pixels. The arrangement of pixel blocks 2 and 4 is the arrangement that would appear on a standard RGB display. When pixel 1 is expanded into pixel block 2, the R, G, and B sub-pixel data of the first pixel in pixel block 2 are all 0, and the R, G, and B sub-pixel data of the second pixel are the same as the R in pixel 1. , G, and B sub-pixel data are the same. When pixel 3 is expanded into pixel block 4, the R, G, and B sub-pixel data of the first pixel in pixel block 4 are all 255, and the R, G, and B sub-pixel data of the second pixel are the same as the R, G, and B sub-pixel data of pixel 3. , G, and B sub-pixel data are the same.

As shown in FIG. 4b , FIG. 4b is an extended schematic diagram of the even-numbered rows of the Delta-type sub-pixel arrangement structure. Pixel 1 and pixel 3 in the figure are pixels before expansion, and each pixel includes three sub-pixels. Pixel block 2 and pixel block 4 in the figure are expanded pixel blocks, and each pixel block contains two complete standard RGB pixels. The arrangement of pixel blocks 2 and 4 is the arrangement that would appear on a standard RGB display. When pixel 1 is expanded into pixel block 2, the R and G sub-pixel data of the first pixel in pixel block 2 are both 255, and the B sub-pixel data is the same as the B sub-pixel data in pixel 1. The data of the R sub-pixel and the G sub-pixel of the second pixel in the pixel block 2 are the same as the data of the R sub-pixel and the G sub-pixel of the pixel 1, and the data of the B sub-pixel is 0. The data of the R sub-pixel and the G sub-pixel in the first pixel in the pixel block 4 are 0, and the data of the B sub-pixel is the same as the value of the B sub-pixel in the pixel 3 . The values of the R sub-pixel and the G sub-pixel in the second pixel in the pixel block 4 are the same as those of the R sub-pixel and the G sub-pixel in the pixel 3, and the value of the B sub-pixel is 255.

As shown in FIG. 4c, FIG. 4c is a schematic diagram of a fully expanded Delta-type sub-pixel arrangement structure. Pixel 1 in the figure is a standard RGB pixel. It can be seen that the arrangement of the expanded sub-pixels maintains the original arrangement order, which perfectly imitates the arrangement of the required display panel. During expansion, three consecutive sub-pixel data of 255 constitute a white pixel, and three consecutive sub-pixel data of 0 constitute a black pixel. Using data 0 and 255 for expansion will not affect the color imbalance of the original image, and can effectively improve the brightness of the restored image.

Referring to FIG. 5a is the original picture (standard RGB picture), and FIG. 5b is the picture processed by the sub-pixel rendering algorithm and displayed by the method of the present invention. It can be seen from FIG. 5b that the present invention realizes the sub-pixel arrangement of a new pixel by using two consecutive pixels, so the picture will be darkened to a certain extent after being restored.

In the embodiment of the present invention, the arrangement rule of sub-pixels in odd-numbered rows and even-numbered rows is the Delta-type sub-pixel arrangement structure shown in FIG. 2 .

Claims (2)

1. A verification display method for Delta type arrangement sub-pixel rendering, characterized in that it is carried out as follows: Step 1, perform sub-pixel rendering processing on the original image with a pixel size of P×Q, and obtain the RGB gray value matrix of the sub-pixel; Step 2. Rearranging the RGB gray value matrix according to the arrangement order of the Delta-type sub-pixels by borrowing sub-pixels from left and right to obtain a Delta-type RGB gray-value matrix with a pixel size of P×2Q; The arrangement order of the Delta-type sub-pixels is: in the arrangement structure of M×N sub-pixels, any sub-pixel in row i and column j, sub-pixel in row i+1 and column j+1, and sub-pixel in row i+2 The sub-pixels in the j-th column and the sub-pixels in the i+3th row and j+1th column have the same color, i=1,2,...,M-3, j=1,2,...,N-1; Step 3: Restore the Delta-type RGB gray value matrix with a pixel size of P×2Q to a Delta-type image with a pixel size of P×2Q, and compare and display the original image and the Delta-type image to complete the verification. 2. The method for verifying and displaying the delta-arranged sub-pixel rendering according to claim 1, wherein the method of borrowing sub-pixels in the step 2 is as follows: Step 2.1, construct any pixel in the even-numbered row in the RGB gray-scale value matrix as a pixel block composed of two pixels in the corresponding even-numbered row in the Delta-type RGB gray-scale value matrix, so that the first pixel in the pixel block The grayscale value of the R subpixel of a pixel and the grayscale value of the G subpixel are filled with 0 or 255, while the grayscale value of the B subpixel remains unchanged; make the second pixel in the pixel block The gray value of the R sub-pixel and the gray value of the G sub-pixel remain unchanged, and the gray value of the B sub-pixel is filled with 0 or 255; and in the even-numbered rows of the Delta-type RGB gray value matrix, make The gray value of the B sub-pixel of the second pixel point of the previous pixel block in any two adjacent pixel blocks and the gray value of the R sub-pixel and the G sub-pixel of the first pixel point of the next pixel block The grayscale values are all 0 or 255; Step 2.2, construct any pixel in the odd-numbered row in the RGB gray-scale value matrix as a pixel block composed of two pixels in the corresponding odd-numbered row in the Delta-type RGB gray-scale value matrix, so that the first pixel in the pixel block The gray value of the R sub-pixel of a pixel, the gray value of the G sub-pixel and the B sub-pixel are all filled with 0 or 255, so that the gray value of the R sub-pixel of the second pixel in the pixel block , the gray value of the G sub-pixel and the gray value of the B sub-pixel remain unchanged.