Method and device for correcting colors of multi-screen splicing wall

Abstract

The invention discloses a method and a device for correcting colors of a multi-screen splicing wall. The method comprises the following steps of: dividing screen images of display units into a plurality of color areas, shooting an image of the splicing wall, extracting set values of base color parameters, reshooting an image of the splicing wall, extracting real-time values of the base color parameters, comparing the real-time values with the set values, judging whether the color difference values are in a set range, and adjusting the colors of the display units, the color difference values of which exceed the set range. The device comprises the splicing wall, a camera, a main control unit and a color correcting unit, wherein the camera is arranged in front of the splicing wall; the main control unit is connected with the camera, the color correcting unit and each screen respectively; the color correcting unit is connected with the camera; and the color correcting unit is color correcting software installed in a computer. The method and the device can realize full automation in the color correcting process, have low cost and good correcting effect, mainly have high speed, and correct the colors of the whole screens to be accordant without color switching of the display units.

Description

technical field [0001] The invention relates to the display technology of a screen mosaic wall, in particular to a method and device for color correction of a multi-screen mosaic 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 command, weather monitoring, power telecommunications monitoring, fire monitoring command, military command, etc., but for multi-screen wall The color and brightness consistency correction of the system has become a major problem for system integrators. [0003] In the application number 200710028437.6, the patent application with the publication number CN100589583C discloses a method for color correction of a multi-screen splicing wall. method, the screen color it sets is a monochrome, and only after all screen monochrome calibrations are completed, can anothe...

AI Technical Summary

Problems solved by technology

[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 command, weather monitoring, power telecommunications monitoring, fire monitoring command, military command, etc., but for multi-screen wall The color and brightness consistency correction of the system has become a major problem for system integrators

[0003] In the application number 200710028437.6, the patent application with the publication number CN100589583C discloses a method for color correction of a multi-screen splicing wall. method, the screen color it sets is a monochrome, and only after all screen monochrome calibrations are completed, can another monochrome be calibrated. As the number of screens increases, the time it takes to complete a screen calibration will become longer and longer. When the number of calibration screens increases, the calibration time will increase exponentially

For example, the patent document with the publication number CN1658651A discloses a color correction method for a multi-channel projection display system, which uses each projection channel to project red, green, and blue colors from 0-255 for 256 times, respectively collects and establishes a mapping data, and then calculate the common intersection of colors, on this basis, iteratively modify the input image for a single modification correction system, then input to the projector and measure the color data, until the number of acquisitions of the corrected mapping data and the target color mapping data is 3×256 = 768 times, and the calibration process may need to be repeated many times. As the number of channels increases, the time spent is also doubled, and the system needs color measurement equipment to complete the calibration function. The use of professional color measurement equipment is expensive and difficult to operate. Complicated, and the versatility of each manufacturer is not good

However, some other general-purpose camera equipment have color-processed the original image, and the color distortion is relatively large.

Images