White balance correcting method and white balance correcting device

Abstract

The invention provides a white balance correcting method and a white balance correcting device. The white balance correcting method includes steps of (1), acquiring white object images in various color temperature light sources; (2), setting white pixel dense regions in all the white object images as automatic white balance correcting regions; (3), acquiring an image, counting pixels, which are within ranges of the automatic white balance correcting regions, of the image, judging whether the quantities of the pixels exceed a set threshold value or not, and automatically correcting the white balance of the image according to following steps if the quantities of the pixels exceed the threshold value; (4), counting R (red), G (green) and B (blue) accumulated values of the pixels, which are within the ranges of the automatic white balance correcting regions, of the image; (5), computing white balance correcting values according to the counted accumulated values and correcting R, G and B components of the full image by the aid of the white balance correcting values. The white balance correcting method and the white balance correcting device have the advantages of high applicability and excellent effect when the white balance correcting method is used for removing processing for images with single color backgrounds and various color temperature light source mixtures.

Description

technical field [0001] The present invention relates to a white balance correction method, in particular to a white balance correction method and its device which are applied to an image processing device or method to adjust the white balance according to one or more light source environments with different color temperatures. Background technique [0002] When a digital image sensor is used to capture a scene, the captured scene will be affected by the color temperature of the light source. Even an object that is originally white will not look white, but will show an obvious color cast. And our visual system will automatically compensate for different color temperature light sources, so no matter what kind of color temperature light source environment we see a piece of white paper will always be white. Therefore, it is necessary to perform white balance correction on the image captured by the digital image sensor to compensate for the color shift phenomenon caused by the co...

AI Technical Summary

Problems solved by technology

However, the disadvantage of this method is that when the scene is under more than one color temperature light source, or under other color temperature light sources, it will make it difficult for this correction method to produce better results.

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