Method for correcting automatic white balance

A technology of automatic white balance and correction method, applied in the direction of color signal processing circuit, etc., can solve problems such as color cast, and achieve the effect of correct image
CN101873504AInactive Publication Date: 2010-10-27SERVICE & QUALITY TECHNOLOGY CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SERVICE & QUALITY TECHNOLOGY CO LTD
Publication Date
2010-10-27
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a method for correcting automatic white balance. The method comprises the following steps of: calculating color values of each pixel in an input image by using a preset gain value; then obtaining a new gain value by using the linear combination after calculating the number dropped in a special gray area within a color space; and in order to solve the possible problem of color cast caused by gamut overlapping, correcting points of positions of the repeated areas in the color space through certain proportion so that the image output by the automatic white balance is more correct. Therefore, users also can determine the effect on the color cast of the image by adjusting the preset gain value.
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Description

technical field

[0001] The present invention is an automatic white balance correction method, especially using the number of each gray area in the color space to obtain a new white balance gain value through linear combination to output more correct images. Background technique

[0002] Under different light sources, the human eye can adapt to the light source and automatically correct it, so that white objects still appear white. However, digital video recording devices, such as digital cameras and digital cameras, only faithfully present the proportion of reflected light from objects, so in greenish Under fluorescent lamps, white objects will have a green tint, while under yellowish street lights, they will have a yellow tint. Although the human eye is not able to completely correct white objects as white under all light sources, digital video recording devices will cause serious chromatic aberration problems. Automatic white balance (AWB) was developed to solve this probl...

Claims

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