A method for image color correction
A color correction and image technology, applied in image enhancement, image analysis, image data processing, etc., can solve the problems of inability to flexibly handle color correction, single algorithm function, poor processing ability, etc., to avoid the effect of overexposure.
Active Publication Date: 2021-04-09
CHENGDU SOBEY DIGITAL TECH CO LTD
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Problems solved by technology
However, the color correction algorithm obtained in this way can only deal with a certain type of problem, the algorithm has a single function, and cannot flexibly deal with various problems encountered in color correction
They have poor ability to deal with contrast and color cast under different exposure intensities, different scenes, and different color temperature conditions, and cannot solve different problems by adjusting the parameters of different modules like the traditional method
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[0051] All features disclosed in all embodiments in this specification (including any appended claims, abstract and drawings), or steps in all methods or processes implicitly disclosed, except for mutually exclusive features and / or steps, can be used as Combining and / or extending, replacing in any way.
[0052] Such as figure 1 , shown in 2, a kind of image color correction method, comprises steps:
[0053] S1, calculate the grayscale transformation LUT of the R, G, and B channels according to the adjusted adjustment parameters of the dark part, middle gray, and bright part modules;
[0054] S2, using the obtained grayscale conversion LUT on the R, G, and B channels, and using the following formula to calculate the amount of change on the R, G, and B channels of each pixel of the image;
[0055] delta_x=LUT(x)-x
[0056] Among them, delta_x indicates the amount of change on the channel, x indicates the input value of the pixel point on the R, G, and B channels, and LUT(x) i...
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The invention discloses an image color correction method, comprising the steps of: S1, calculating the gray scale transformation LUT of the RGB channel according to the adjusted adjustment parameters of the dark part, middle gray and bright part modules; S2, using the obtained R, G, The grayscale transformation LUT on the B channel calculates the amount of change on the R, G, and B channels of each pixel of the image; S3, on the basis of step S2, combines the color balance theory to calculate the output on the R, G, and B channels of the image pixel . The present invention does not cut the data on each channel of the image, does not lose the color information and brightness information of the image, can keep the exposure intensity of the image consistent before and after color correction, and can make very soft, delicate and natural adjustments to the image. And there will be no color separation and overexposure, and it can be applied to various image processing algorithms.
Description
technical field [0001] The present invention relates to the field of image color processing, and more specifically, to an image color correction method. Background technique [0002] With the development of digital film and television production technology, image and video media have become the most important way for people to obtain information in today's society. However, when shooting the material, due to various reasons, the original material may have a color cast problem. At this time, it is necessary to use color correction to restore the tone of the real material as much as possible. In addition, in the field of film and television post-production, it is usually necessary to stylize the picture through color correction algorithms to create a special atmosphere. At present, there are mainly the following solutions for color correction: [0003] Based on the color correction method of traditional image processing, use the dark part, middle gray and bright part modules...
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IPC IPC(8): G06T5/00
CPCG06T2207/10024G06T5/90
Inventor 罗天袁霞王毅
Owner CHENGDU SOBEY DIGITAL TECH CO LTD