Splicing bright-dark line correction method

Abstract

The invention relates to a splicing bright-dark line correction method which is applicable to splicing type display screens such as an LED screen. The splicing bright-dark line correction method comprises the steps of determining the size of each display bright block and the size of each display dark block according to the size of splicing units, then controlling and lightening the display screen so as to be provided for shooting to acquire a target image; carrying out image processing on the target image so as to acquire the gray scale center of each of the plurality of bright blocks, and then calculating the display unit spacing and the splicing gap spacing; and finally, calculating a correction coefficient of each marginal display unit, which is adjacent to a splicing gap, of the splicing units by using the display unit spacing and the splicing gap spacing so as to be used for correcting a bright-dark line caused by the splicing gap. According to the invention, people can carry out correction on the bright-dark line accurately by only shooting one image through designing the display unit lightening mode; and furthermore, a problem that the display body uniformity get poor because bright-dark line correction in the prior art is carried out through full-screen analysis can also be avoided.

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

Images