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A LCD color domain mapping algorithm and color management system

A liquid crystal display, color gamut mapping technology, applied in the field of color gamut mapping algorithm and color management system, can solve the problems of complicated solution, no physical basis, and the existence of j cannot be guaranteed, and achieves increased accuracy and efficient color management. system effect

Inactive Publication Date: 2008-05-28
上海广电集成电路有限公司
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Problems solved by technology

This modeling method improves the accuracy of the mapping model, but it has no physical basis, and it is approximated purely from the aspect of mathematical fitting, not only every time D i，j The solution of the matrix is ​​cumbersome, and the matrix D i，j The existence of

Method used

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  • A LCD color domain mapping algorithm and color management system
  • A LCD color domain mapping algorithm and color management system
  • A LCD color domain mapping algorithm and color management system

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Embodiment Construction

[0049] A color gamut mapping algorithm and a color management system of a liquid crystal display of the present invention will be further described in detail below.

[0050] The color gamut of a liquid crystal display depends on the emission spectrum of the light source, the transmission spectrum of the liquid crystal panel, color filters (CF) and polarizers, etc., forming a complex color model. A color gamut mapping method of a liquid crystal display provided by the present invention—a segmented simulation algorithm, that is, a model of a segmented linear matrix product, cooperates with four one-dimensional lookup tables and two proportional mapping functions, and comprises the following steps:

[0051] Step a, control the signal generator and the color analyzer, the white point brightness and chromaticity information (X w , Y w ,Z w )w=0, 1, ..., 255 for testing and recording;

[0052] Step b, using the same method as step a, respectively test and record the brightness in...

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Abstract

The invention provides a color management system for liquid crystal displays, which comprises a LCD screen test unit, a positive color gamut mapping unit, a color switching unit, a cross-border processing unit and a reverse color gamut mapping unit. Aiming at the fixtures of the color gamut of a liquid crystal display, the invention provides a method and a fragment simulation algorithm which can clearly describe the mapping model of such kind of equipment between the color gamut of the equipment relative color space and the color gamut of the equipment irrelative color space, thereby effectively improving the accuracy of the color management system in such kind of display equipment; so that the same feeling of colors can be felt from liquid crystal televisions and liquid crystal monitors, which have different photoelectric and color properties.

Description

technical field [0001] The invention relates to a color signal processing method and system, more specifically, the invention relates to a color gamut mapping algorithm and a color management system of a liquid crystal display. Background technique [0002] With the emergence of ever-changing display devices, users often find that the same picture will be reproduced in different colors on various display devices (such as LCD, CRT, PDP, printers, etc.), and it is difficult to tell which one is the original color of the image. . The reason is that in a digitized image, although the color of each pixel corresponds to a unique array of digital color values, when this set of color values ​​is presented through different devices (such as digital camera photosensitive, CRT electron beam bombardment display, The polarized light of the LCD passes through the filter) can only be simulated, and the color is closely related to the characteristics of the device, so the displayed colors ...

Claims

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Application Information

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IPC IPC(8): G09G3/36G09G3/00G09G5/06G02F1/13G01J3/46
Inventor 丁礼儒
Owner 上海广电集成电路有限公司
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