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Color gamut mapping method and system

A color gamut and color gamut extension technology, applied in the field of color gamut mapping methods and systems, can solve problems such as roughness, inaccuracy, distortion and errors, and achieve the effect of avoiding mapping mismatch and achieving precise matching

Active Publication Date: 2021-03-05
SHENZHEN TCL NEW-TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The mapping and matching from the transmission color gamut to the display color gamut is realized through a 3×3 matrix. It is not very accurate, and only rough matching can be done, and distortion and errors will occur.

Method used

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  • Color gamut mapping method and system
  • Color gamut mapping method and system
  • Color gamut mapping method and system

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Embodiment Construction

[0062] In order to make the object, technical solution and advantages of the present invention more clear and definite, the present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0063] Other embodiments of the invention will be readily apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. The present invention is intended to cover any modification, use or adaptation of the present invention, these modifications, uses or adaptations follow the general principles of the present invention and include common knowledge or conventional technical means in the technical field not disclosed in this disclosure .

[0064] This embodiment provides a color gamut expansion method, such as figure 2 ,incl...

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Abstract

The invention provides a color gamut expansion method and system, and the method comprises the steps: obtaining the brightness value of each sampling point corresponding to the image data of a transmission end based on a three-dimensional mapping table; performing equal-brightness cutting on the three-dimensional color gamut model of the transmission end and the three-dimensional color gamut modelof the display end based on the brightness value of each sampling point to form a corresponding equal-brightness two-dimensional surface; and performing color mapping based on the formed equal-brightness two-dimensional surface, and outputting mapping data. Therefore, according to the method, when color gamut mapping is carried out, brightness and hue are kept unchanged, accurate matching of three-dimensional color gamut extension from the transmission color gamut to the display color gamut is achieved, and the problems of image distortion or display errors and the like caused by mapping mismatching between the transmission color gamut and the display color gamut are avoided.

Description

technical field [0001] The present invention relates to the technical field of image processing, in particular to a color gamut mapping method and system. Background technique [0002] Broadcast TV receivers often encounter the problem of inconsistency between the transmission color gamut (that is, the color gamut transmitted by the broadcast TV system, the source color gamut) and the display color gamut (that is, the color gamut that the display can cover) when performing color restoration. This problem will cause the reproduced color to be unable to be truly restored, and even the problem of color distortion may occur. [0003] At present, the transmission color gamut of the broadcast television system includes BT601 (standard definition), BT709 (high definition) and so on. With the development of display technology, the display color gamut continues to expand. In the current situation, usually the display color gamut (LCD liquid crystal display) is larger than the trans...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N9/64
CPCH04N9/64H04N9/67H04N1/6058G09G5/06G09G5/10G09G2320/0626G09G2340/06G09G2360/16
Inventor 张晓东
Owner SHENZHEN TCL NEW-TECH CO LTD