Device and method for adjusting white balance

Abstract

The present invention provides a white balance adjustment method, comprising: obtaining the initial distribution ratio of the white balance reference points of each light source in the current environment; detecting the exposure coefficient of the current environment to determine the type of the current environment; Type, query the preset weight adjustment table to obtain the weight value of each light source in the current environment; adjust the initial distribution ratio according to the weight value of each light source in the current environment to obtain the final white balance parameters. The present invention obtains the initial distribution ratio of the white balance reference points of each light source in the current environment, then determines the type of the current environment according to the exposure coefficient of the current environment, and queries the weight adjustment table according to the type of the current environment to obtain the weight value of each light source. Finally, each light source weight value adjusts the initial distribution ratio to obtain the final white balance parameters, thereby directly removing the interference of the final white balance calculation due to misjudgment of the environment type, and achieving the purpose of optimizing the white balance reference point.

Description

technical field [0001] The invention relates to the technical field of mobile communication, and in particular to a white balance adjustment device and method. Background technique [0002] White balance (white balance) is an important indicator of the camera's red, green, and blue primary colors to generate white accuracy. At present, both mobile phone cameras and SLRs support automatic white balance adjustment, which has high requirements for the accuracy and timeliness of camera white balance. An important factor affecting white balance is the color temperature of the current environment, for example, A, H, TL84, D65, D50, etc. represent different color temperature values. From the perspective of camera debugging, you can accurately adjust the white balance parameters under different color temperatures under the light box, namely red gain (R-gain), blue gain (B-gain) and green gain (G-gain). The camera will also show the best white balance effect under the light box, bu...

AI Technical Summary

Problems solved by technology

Under normal circumstances, this method can meet the white balance calculation requirements, but there may be ISP estimation errors or deviations from the actual situation (usually at the junction of the two color temperatures), resulting in certain differences in the actual white balance. error, causing the overall color cast of the picture

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