White balance processing method and device based on RGB space

Abstract

The invention discloses a white balance processing method and device based on an RGB space. The method comprises the following steps: after obtaining an original value of each pixel point in a to-be-processed image respectively in an R color channel, a G color channel and a B color channel, calculating red-blue color differences of the pixel points; determining neutral grey pixel points via the red-blue color differences and neutral grey pixel point judgment conditions, wherein the neutral grey pixel point judgment conditions are iterated and updated with a current color temperature change; after that, according to a proportion of the number of the neutral grey pixel points to the total number of the pixel points in the to-be-processed image, calculating to obtain gain values of the pixel points respectively in the R color channel, the G color channel and the B color channel, obtaining corrected values of the pixel points according to the gain values, and then adjusting the original values of each pixel point in the to-be-processed image respectively in the R color channel, the G color channel and the B color channel to the corrected values, thereby realizing white balance processing of the to-be-processed image. Through the scheme disclosed by the invention, the white balance processing on the image can be realized; and thus, the color differences in the image are reduced, and the image quality is improved.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of image processing, and in particular, to a white balance processing method and device based on RGB space. Background technique [0002] Different light sources have different spectral components and distributions, and this phenomenon is called color temperature in colorimetry. The same white object will have color difference when illuminated by light sources with different color temperatures. For example, under the light source with low color temperature, the white object will appear reddish, while under the light source with high color temperature, the white object will appear blue. [0003] Among them, correcting the color difference caused by different color temperatures, so that white objects appear truly white, is called white balance. For example, the human visual system can automatically adjust the light sensitivity according to the color temperature of the current light sourc...

AI Technical Summary

Problems solved by technology

[0004] However, the inventor found in the research process of this application that the image acquisition system often cannot achieve white balance, resulting in chromatic aberration in the collected images, resulting in poor quality of the collected images

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