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Method and device for color transformation of color spaces based on CIE Lab (International Commission on Illumination Laboratory)

A technology of color conversion and color space, applied in static indicators, cathode ray tube indicators, color signal processing circuits, etc., can solve problems such as large color differences, complex solution process of model method, and unsatisfactory conversion errors, etc.

Active Publication Date: 2012-08-01
SHENZHEN CHINA STAR OPTOELECTRONICS TECH CO LTD
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Problems solved by technology

There are many technologies to realize color space conversion, such as model method and neural network algorithm. Among them, the model method has a complicated solution process, and the conversion error is often not ideal. The neural network algorithm requires a lot of experiments and takes a long time each time; and this Two kinds of color conversion technology make the color performance of the monitor very different from the color of the real object

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  • Method and device for color transformation of color spaces based on CIE Lab (International Commission on Illumination Laboratory)
  • Method and device for color transformation of color spaces based on CIE Lab (International Commission on Illumination Laboratory)
  • Method and device for color transformation of color spaces based on CIE Lab (International Commission on Illumination Laboratory)

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Embodiment Construction

[0061] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0062] figure 1 It is a flowchart of an embodiment of the color conversion method based on the CIE Lab color space of the present invention, as figure 1 shown, including the following steps:

[0063] Step S101: input the original image data based on the CIE Lab three-dimensional color space;

[0064] The Lab three-dimensional color space is established based on the theory that a color cannot be both blue and yellow at the same time. A single value can be used to describe the characteristics of red, green and yellow-blue. Among them, L represents the lightness value, a represents the red-green value, b Indicates the yellow-blue value. It uses three mutually perpendicular coordinate axes of L, a, and b to represent a color space. The L axis represents lightness, with black at the bottom and white at the top. +a means magenta, -a means green, +b mean...

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Abstract

The invention discloses a method for color transformation of the color spaces based on the CIE Lab (International Commission on Illumination Laboratory). The method comprises the steps of: transforming original image data two-dimensional color space planes Ln and Ln-1 into target two-dimensional color space planes Ln' and Ln-1', calculating Lx', which exists between Ln' and Ln-1', under the same brightness level as that of Lx according to any brightness plane Lx between Ln and Ln-1, calculating a transformation relational matrix between Lx and Lx', calculating a target color after color transformation regulation based to the color of any point of the original image data on the plane Lx, and completing the color space of the target color. The invention further discloses a device for the color transformation of the color spaces based on the CIE Lab and a liquid crystal display device. According to the invention, based on the manner in such a way, an inverse transformation model can be established more easily, and an algorithm is simple to implement and high in running speed, so that the color performance is closer to the color of a real object or is closer to a preset effect than the color of the real object.

Description

technical field [0001] The present invention relates to the technical field of color conversion, in particular to a color conversion method, device and liquid crystal display device based on CIE Lab (Commission International d'Eclairage) color space. Background technique [0002] Due to the inherent dispersion problem of liquid crystal displays, coupled with the combination of photoresist and light source, the color performance of the display will be very different from the color perceived by human eyes in the real world. [0003] From the perspective of physics, based on photometry, the mixture of three primary colors is used to describe all colors in nature. The color system established based on this theory is called a color mixing system. The CIE system of the International Commission on Illumination is the most important method of color representation in the color mixing system, such as CIE XYZ, CIE Lab, CIE LUV or CIE LCH. [0004] Color conversion refers to the proces...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N9/64G09G3/36
CPCH04N9/67G09G5/02H04N1/60H04N9/64G09G2340/06H04N1/6061
Inventor 康志聪
Owner SHENZHEN CHINA STAR OPTOELECTRONICS TECH CO LTD
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