Spliced wall color correction method and system

Abstract

The invention relates to the field of display screen color correction, in particular to a spliced wall color correction method and system. The method includes the steps that it is set that each display unit displays one picture, and each color, capable of being displayed on a screen system, in the picture corresponds to one color region; a picture covering a whole spliced wall is taken; the color mean value of color regions of all the display units is extracted according to the taken picture; a reference display unit is selected; the color mean value of the color regions in all the display units is adjusted to be the color mean value of each color region in the reference display unit. Each color is adjusted according to the mean value of the color, the color of each display unit is adjusted to be the color of a reference screen, and self-adaptability of color correction is greatly improved; by selecting one display unit as a reference unit to carry out adjustment, in the color correction process, switching of primary colors in the display units is not needed, the adjustment process is greatly accelerated because the colors are well set at a time, and the correction time is short.

Description

technical field [0001] The present invention relates to the field of color correction of display screens, and more specifically, to a method and system for color correction of a video wall. Background technique [0002] With the improvement of people's demand for display information transmission, the application fields of large-screen display have spread to various fields such as public display, transportation dispatching and commanding, weather monitoring, power and telecommunications monitoring, fire monitoring and commanding, and military commanding. Although the demand for large-screen display applications is increasing, the consistent correction of color and brightness of the multi-screen video wall system has become a major problem for system integrators. [0003] An existing multi-screen wall correction method is to use a camera to capture the pre-set colors of each screen, and then extract the color information of each display unit from the captured pictures, and per...

AI Technical Summary

Problems solved by technology

This method takes a short time to adjust, but it does not take into account the defects of the images captured by the camera. When the camera captures a screen with a light source, the fatal defect of the image is that the center of the captured area is the brightest, and the brightness decreases from the circle to the edge. , which causes a very large error when adjusting the screen color, and at the same time increases the adjustment time

[0004] Another correction method is to use each projection channel to project the red, green, and blue colors from 0-255 256 times, collect and establish mapping data respectively, and then calculate the public intersection of the colors, and then repeatedly correct the individual corrections on this basis. The system modifies the input image, then inputs it to the projector and measures the color data until the number of acquisitions of the corrected mapping data and the target color mapping data is 3*256=768 times. This correction process may require multiple iterations. As the number increases, the time spent also doubles

In addition, the system requires color measurement equipment to complete the calibration function. The use of professional color measurement equipment is expensive, the operation is complicated, and the versatility of each manufacturer is not good, and some other general-purpose camera equipment have performed color processing on the original image. Larger color distortion

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