White balance calibration method and electronic equipment

Abstract

The embodiment of the invention provides a white balance calibration method and electronic equipment. The method comprises the following steps: determining color temperature weight coefficients of multiple light sources according to the ambient brightness during image shooting; performing blocking processing for an image, calculating the actual color ratio of each image block after being subjected to blocking processing, and determining which light source each image block should correspond to according to the actual color ratio of the image blocks and the reference color ratio of each light source; separately determining the own scores of multiple light sources according to the number of the image blocks and the color temperature weight coefficient corresponding to each light source, and determining that the color temperature of the shooting environment is closer to the color temperature of the light source when the score is higher; and calibrating the color of each pixel point in the image according to the reference color ratio of the light source with the maximum score to achieve white balance calibration of the image. By adopting the scheme provided by the invention, the light source corresponding to the image shooting process can be accurately determined according to the brightness, and even if a large area of monochrome appears in the image, the phenomenon of wrongly determining the light source cannot occur, and thus the image quality can be improved.

Description

technical field [0001] The invention relates to the technical field of image processing, in particular to a white balance calibration method and electronic equipment. Background technique [0002] Many people will find that the color of the object in the photo will change due to the different shooting environments when taking pictures with camera equipment. For example, the object shot under indoor tungsten light will be yellowish, and the object shot outdoors in the shadow of sunlight Objects that come out will be bluish. [0003] Different light sources have different spectral components and distributions, which is called color temperature in colorimetry, and color temperature is the definition of color, with K (Kelvin) as the unit. In real life, whether it is sunny, cloudy, indoor incandescent or fluorescent, the white objects people see are always white, which is often achieved based on white balance calibration. White balance is to correct the color difference caused ...

AI Technical Summary

Problems solved by technology

However, this method also has certain limitations: when the color information in the photos taken is not rich, for example, when there is a large-area monochrome object, this method cannot accurately perform white balance calibration, resulting in a decrease in the quality of the photo

Images