White balance adjustment method and system based on color gamut mapping and white balance terminal

Abstract

The invention provides a white balance adjustment method and system based on color gamut mapping, and a white balance terminal. The method comprises the steps of obtaining a white point region and a standard color gamut obtained based on experimental data; acquiring a target image color gamut based on a target image acquired by a camera; calculating a gain color gamut of the target image color gamut relative to the standard color gamut; obtaining an intersection of the white point region and the gain color gamut to obtain an effective gain region; if the effective gain region is empty, takingthe gravity center point of the gain color gamut as a white balance gain coefficient; and if the effective gain area is not empty, calculating white balance gain based on the effective gain region. According to the white balance adjustment method and system based on color gamut mapping and the white balance terminal, discrete neutral point distribution is effectively constrained based on a color gamut mapping algorithm, and a relatively reasonable white balance gain coefficient is given when neutral colors do not exist in a scene, so that the accuracy of white balance adjustment is greatly improved.

Description

technical field [0001] The present invention relates to the technical field of white balance adjustment, in particular to a white balance adjustment method, system and white balance terminal based on color gamut mapping. Background technique [0002] White balance is an index that describes the accuracy of white after the three primary colors of red, green and blue are mixed in the display. White balance is a very important concept in the field of TV photography, through which a series of problems of color reproduction and tone processing can be solved. White balance is produced along with the true color reproduction of electronic images, which can make the camera image accurately reflect the color status of the subject. [0003] The process of adjusting the white balance is called white balance adjustment. There are generally three ways to adjust the white balance on the early equipment: preset white balance, manual white balance adjustment and automatic tracking white ba...

AI Technical Summary

Problems solved by technology

However, for most scenes, due to the complexity of the light source, the distribution of neutral points is very discrete and will not be concentrated in a certain calibrated light source area, or there are many scenes where there is no neutral color surface

Therefore, the above-mentioned white balance adjustment method is prone to deviation or even abnormality.

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