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Color gamut adjusting method and device for color image

A color image and color tone technology, applied in the field of color gamut adjustment methods and devices for color images, can solve the problems of coarse granularity, poor user experience, and unsatisfactory display results, and achieve the effect of improving display effect and fine-grained adjustment.

Active Publication Date: 2014-03-12
ORISE TECHNOLOGY CO LTD
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

The adjustment granularity of this adjustment method is relatively coarse, and the output display results after adjustment are often not ideal, resulting in poor user experience.

Method used

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  • Color gamut adjusting method and device for color image
  • Color gamut adjusting method and device for color image
  • Color gamut adjusting method and device for color image

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Embodiment Construction

[0037] The technical solutions in the embodiments of the present invention will be described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0038] Embodiments of the present invention provide a method and device for adjusting the color gamut of a color image, which can improve the display effect of the image.

[0039] see figure 1 , an embodiment of the color gamut adjustment method of the color image of the present invention includes:

[0040] 101. Perform color space conversion on the color image in the RGB color space to obtain the hue of each pixel of the color image;

[0041] Because the color gamut of ...

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PUM

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Abstract

The embodiment of the invention discloses a color gamut adjusting method and a device for a color image. The color gamut adjusting method comprises the following steps: carrying out color space conversion on the color image in an RGB (Red, Green, Blue) color space to obtain tone of each pixel point; evenly dividing a circular distribution diagram into N axes according to the number N of primary colors, wherein the axes represent the primary colors, and angles formed between the axes represent assorted colors; according to the position of the tone of each pixel point in the color image on the circular distribution diagram and a preset algorithm, calculating a saturation gain value of each pixel point, and adjusting the saturation of each pixel point according to the saturation gain value of each pixel point; converting the color image after saturation adjustment back to the RGB color space; converting the color image after saturation adjustment from the RGB color space to an RGBW (Red, Green, Blue, White) color space and outputting the color image. According to the embodiment of the invention, the saturation is adjusted according to different tones to enable the color gamut of an input image to fall in a color gamut range which can be displayed by an output display, and a display effect of the image can be improved.

Description

technical field [0001] Embodiments of the present invention relate to image processing technologies, and in particular, to a color gamut adjustment method and device for a color image. Background technique [0002] A color gamut is a complete subset of colors defined using volumes. The red, green, blue RGB color space is a standard well-known color space definition. The color space of many images follows the definition of the RGB color space, such as pictures saved in the RGB space and videos in the BT.709 format or xvYCC format recommended by ITU-R. [0003] Most of the images input by the RGB color space need to be displayed on the red, green, blue, and white RGBW monitors, and the images input by the RGB color space have a larger color gamut, and the RGBW monitors such as notebook computer monitors can display images with a larger color gamut Therefore, before displaying the image on an RGBW display, the color gamut of the input image in the RGB color space must be adju...

Claims

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Application Information

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IPC IPC(8): H04N9/64
Inventor 许瀚仁王建国
Owner ORISE TECHNOLOGY CO LTD
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