Stitching light and dark line correction method

Abstract

The invention relates to a splicing bright and dark line correction method suitable for a spliced ​​display screen, such as an LED display screen, which determines two complementary screen display unit lighting modes according to the size of the splicing unit, and then determines the screen display unit point according to the determined The bright mode controls the lighting of the display screen for shooting to obtain two complementary target images; then image processing is performed on the obtained target images to obtain the grayscale center of each display bright block, and then the display unit spacing and splicing gap spacing are calculated; finally The display unit spacing and the splicing gap spacing are used to calculate the correction coefficients of each edge display unit of the splicing unit adjacent to the splicing gap to correct the splicing bright and dark lines caused by the splicing gap. By designing the lighting method of the screen display unit, the present invention can accurately correct the spliced ​​bright and dark lines by taking only two images; in addition, it can also avoid the uniformity of the screen caused by the existing technology of repairing the spliced ​​bright and dark lines through full-screen analysis. The problem of sexual deterioration.

Description

technical field [0001] The invention relates to the technical field of display control, in particular to a splicing bright and dark line correction method. Background technique [0002] LED displays are usually spliced ​​by multiple splicing units. Due to the limitations of machining accuracy and assembly accuracy in the splicing process, the splicing between the splicing units is not uniform, resulting in LED lights of the same color on the edge of the splicing. Inconsistent dot spacing. When displaying an image, a dark seam will appear when the spacing is greater than the standard spacing of the light points, and a bright seam will appear when the spacing is smaller than the standard spacing of the light points. dark line. [0003] It is difficult to completely solve the splicing bright and dark lines caused by machining, etc. by improving the precision of machining. The traditional method observes the position of spliced ​​bright and dark lines with human eyes, and man...

AI Technical Summary

Problems solved by technology

[0005] However, for the aforementioned prior art, (a) it needs to take multiple images and then combine them into one. Due to the camera shake in the process of taking the picture, the position of the LED light point will be offset, so the combined image is obtained There is an error in the spacing of the LED lights, and the calculated correction coefficient is not accurate; (b) Since the size of the splicing unit is unknown, as long as the difference in the area of ​​the two LED lights is greater than a certain threshold, it is considered that there is a gap and corrected / corrected, Therefore, the position without splicing gap will also be repaired, resulting in uneven screen body after correction; (c) the larger the LED display screen, the farther the camera is required from the screen body, and a larger spacing point is required at this time (such as K*K) for image capture, so more images need to be captured (K*K); in addition, there is camera shake in the process of capturing images, the image position will be shifted, and the error introduced will be larger

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