Method and device for adjusting automatic white balance

Abstract

The invention applies to the field of image processing and provides an automatic white balance adjustment method and device. The method comprises the steps of through utilization of a demosaic algorithm, recovering each pixel in a raw data image to an RGB full color; multiplying preset gain coefficients by a R component value, a G component value and a B component value of each pixel recovered tothe RGB full color, thereby obtaining data sources for white balance statistics; converting the image from an RGB color space to corresponding color spaces based on data attributes on which statisticsneeds to be carried out according to the data sources for the white balance statistics, and carrying out statistics on required information to obtain white balance data; processing the white balancedata through utilization of a computer program, thereby obtaining a final gain value; and carrying out white balance correction on each pixel in the image according to the final gain value. Accordingto the method and the device, the calculation of the gain of each time may be not influenced by a history correction result, an oscillation phenomenon is effectively avoided, the system is relativelystable and reliable, and the system flexibility and compatibility are improved.

Description

technical field [0001] The invention belongs to the field of image processing, and in particular relates to an automatic white balance adjustment method and device. Background technique [0002] The adjustment scheme of the automatic white balance in the prior art is as follows: the optical sensor sends the image data A to the RGB gain digital adjustment module, and the RGB gain digital adjustment module performs digital gain adjustment on the image data A, and converts the adjusted digital white balance image data B Send it to the RGB interpolation module, the RGB interpolation module will perform interpolation processing on the digital white balance image data B, and send the interpolated full-color image data C to the automatic white balance processing module, and the automatic white balance processing module will generate corresponding RGB gain parameters , and send the RGB gain parameters to the RGB gain digital adjustment module. [0003] However, the above-mentioned ...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide an automatic white balance adjustment method and device, aiming to solve the problems of poor system reliability, poor system stability and low compatibility to different scenes of the automatic white balance adjustment scheme in the prior art

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