A method for improving color digital image quality

A digital image and color image technology, applied in image enhancement, image analysis, image data processing and other directions to achieve the effect of enhancing color

Active Publication Date: 2018-12-28
浙江智彩科技有限公司
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  • Abstract
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Problems solved by technology

[0004] The technical problem to be solved by the embodiments of the present invention is to provide a method for improving the quality of color digital images, which can solve the problem of quantitatively adjusting the brightness and color of the image, so that the color can be improved more intuitively and truly conform to the visual characteristics of the human eye

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  • A method for improving color digital image quality
  • A method for improving color digital image quality
  • A method for improving color digital image quality

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Embodiment Construction

[0037] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0038] Such as figure 1 As shown, in the embodiment of the present invention, a kind of method for improving the quality of color digital image proposed, comprises the following steps:

[0039] Step S1, acquire the original RGB color image, and convert the original RGB color image into a CIEXYZ image using a preset conversion model, and further use the CIELAB color space to convert the CIEXYZ image into a three-dimensional space coordinate L*, a* and the CIELAB image of b*;

[0040] The specific process is to obtain the original RGB color image and its corresponding chroma value, and use the formula (1) to normalize the RGB value C of each pixel of the original RGB color image srgb Convert to linear RGB value C linear , wherein, C is one of R, G, B;

[0041] ...

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Abstract

The invention provides a method for improving the quality of a color digital image, comprising the steps of acquiring an original RGB color image, gradually converting the original RGB color image toa CIELAB image, and determining the coordinate values of L*, a* and b* in the CIELAB image; according to the coordinate values of L*, a* and b*, the calculated values of whiteness, blackness, saturation and brightness in the preset visual characteristic indexes being obtained; adjusting and updating the calculated values of one or more indexes to obtain new values of each index and new coordinatevalues of L*, a* and b* in corresponding output CIELAB images; the new CIELAB image formed by the new coordinate value being gradually inversely transformed to the new RGB color image and updated. Theinvention can solve the problems of quantitatively adjusting the brightness, darkness and color of an image, so that the color can be improved more directly and truly conforms to the visual characteristics of a human eye.

Description

technical field [0001] The invention relates to the technical field of color image processing, in particular to a method for improving the quality of color digital images. Background technique [0002] The main content of image enhancement processing is to highlight the interesting part of the image, weaken or remove unnecessary information, and strengthen the useful information, so as to obtain a more practical image or convert it into an image that is more suitable for human or machine analysis and processing. . Color images contain more information than grayscale images. Whether it is for people's visual experience or subsequent image understanding and analysis, color images have incomparable advantages over grayscale images. Color image enhancement is the process of enhancing the color image in some way. In the existing color image enhancement methods, firstly, the original color image is converted from the red, green, blue RGB space to a certain color space, such as t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T5/00
CPCG06T2207/10024G06T2207/20172G06T5/73
Inventor 崔桂华曺润智阮秀凯谈燕花蔡启博
Owner 浙江智彩科技有限公司
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