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Method for correcting color domain in treating video signals of LED display screen

A technology for LED display and video signal processing, applied in color signal processing circuits, static indicators, instruments, etc., can solve problems such as a large number of transfer matrices, difficulty in implementation, and lack of highlighting the color expressiveness of LED displays.

Inactive Publication Date: 2012-04-18
DALIAN MARITIME UNIVERSITY
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Problems solved by technology

Both method 1 and method 2 use the existing video source color gamut as the target color gamut, which reduces the color gamut range of the LED display, and does not highlight the color expressiveness of the wide color gamut of the LED display; method 2 requires a large number of transfer matrices, and the algorithm Complex, difficult to implement in practice

Method used

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  • Method for correcting color domain in treating video signals of LED display screen
  • Method for correcting color domain in treating video signals of LED display screen
  • Method for correcting color domain in treating video signals of LED display screen

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Embodiment Construction

[0033] The present invention will be further described below in conjunction with the accompanying drawings. like figure 1 As shown, a method for correcting the color gamut in LED display video processing, specifically includes the following steps:

[0034] A. Complete the conversion from the three primary color system of the video source system to the CIE1931XYZ color system through the color space conversion module A: the input signal R of the color space conversion module A P , G P , B P The conversion relationship with output X, Y, Z is as follows:

[0035] X Y Z = M 1 * R P G P ...

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Abstract

The invention discloses a method for correcting a color domain in treating the video signals of an LED display screen, in particular to a method for expanding the color domain of a video source signal by using only one transition matrix, in order to overcome the disadvantages that the color domain of an LED display screen is reduced and the algorithm is complicated in the existing method. The method comprises the following steps: completing the mutual conversion of the video source system between a tri-chromatic system and a CIE1931XYZ color order system by a color / space conversion module; acquiring the chromaticity coordinate of the signal in the CIE1931Yxy chromatic diagram by an XYZ / Yxy normalizing module; expanding and correcting the chromaticity coordinate by one transition matrix in the Yxy colorimetric system; acquiring a new XYZ value from the corrected chromaticity coordinate by a Yxy / XYZ denormalizing module; and acquiring the expanded tri-chromatic value by the color / space conversion module. Accordingly, the invention can emphasize the high color expression of the LED display screen and improve the color distortion thereof by the simpler method.

Description

technical field [0001] The invention relates to a LED display screen video signal processing technology, in particular to a method for correcting color gamut in the LED display screen video signal processing. Background technique [0002] The color gamut correction of the full-color display of the LED display is used to complete the color gamut matching between the existing video signal source system and the LED display, and improve the color distortion caused by the difference in the three primary color characteristics of the two. The principle is to convert the three primary color values ​​of each color into new values ​​through a transformation to control the driving current of the LED display to display the required color. There are two existing color gamut correction methods for LED displays: the first method is to obtain the conversion relationship between the three primary color systems of the existing video source system, the three primary color systems of the LED di...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N9/64G09G3/32
Inventor 王丹王瑜彭周华胡晓静
Owner DALIAN MARITIME UNIVERSITY
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