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 two complementary screen body display unit lightening modes according to the size of splicing units, then controlling and lightening the display screen according to the determined screen body display unit lightening mode so as to be provided for shooting to acquire two complementary target images; carrying out image processing on the acquired target images respectively so as to acquire the gray scale center of each display bright block, 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 splicing 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 two images through designing the screen body display unit lightening modes; and furthermore, a problem that the screen body uniformity gets poor because splicing 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...

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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 cons

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