White balance adjustment method, system and camera

Abstract

The invention is applicable on the image treatment field, which provides a method, a system and a picture pick-up device for adjusting white balance, wherein the method comprises the following steps switching a image data of a RGB format into a image data of a YCbCr format, estimating the color temperature information of reference white points in images, calculating the gain of channels of R, G and B according to the effective color temperature information, and using the gain of channels of R, G and B to adjust the pixel values of R, G and B in the images. The invention estimates the availability of the color temperature of the reference white point during the white balance adjustment and adjusts the white balance according to the effective color temperature information, which can improve the efficiency and accuracy of the white balance adjustment.

Description

technical field [0001] The invention belongs to the field of image processing, and in particular relates to a white balance adjustment method, system and camera device. Background technique [0002] White balance is the restoration of white by the camera, that is, the image output by the camera can correctly reproduce the white of the white object under different light environments, and restore the color of other objects based on the restored white. At present, cameras generally have automatic white balance and manual white balance functions. White balance adjustment enables the camera to automatically perform white balance correction within a certain color temperature range, and the color temperature range that can be automatically corrected is generally between 2500K and 7000K. [0003] Most of the white balance adjustments are based on the grayscale world hypothesis algorithm, which believes that the statistical average values ​​of the three color components of R (red), ...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the embodiments of the present invention is to provide a white balance adjustment method, which aims to solve the problem that the existing white balance adjustment does not evaluate whether the color temperature information of the reference white point in the image is valid, which affects the efficiency and accuracy of the white balance adjustment The problem

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