White balance processing method and device

Abstract

The embodiment of the invention discloses a white balance processing method and device. The white balance processing method comprises the following steps of: obtaining a picture obtained by a module of a camera to be corrected under a pre-set light source, calculating an average value of red R, green G and blue B within a picture setting range, and calculating a white balance actual value corresponding to a white balance standard value through the average value, wherein the white balance standard value is obtained by obtaining a picture under the pre-set light source by using a standard module, calculating the average value of the red, the green and the blue within the picture setting range, and calculating through average value; obtaining gains of the red, the green and the blue of the white balance into a control register of a sensor of the camera to be corrected through a white balance value actual value and the white balance standard value; and writing the gains of the red, the green and the blue of the white balance to a control register of a sensor of the camera to be corrected. The problems of color cast of a single module, color consistency of different modules, and image color cast can be solved by carrying out proper correction of the white balance on RAW DATA output by the camera.

Description

technical field [0001] The invention relates to the field of image processing, in particular to a white balance processing method and device. Background technique [0002] White balance (Auto White Balance) refers to making the image collected by the sensor (Sensor) close to the real picture seen by the human eye at different color temperatures, that is, the image obtained by making a white object shot at different color temperatures is also white of. [0003] Raw data (RAW DATA) is unprocessed and uncompressed data, which is the raw data that the sensor converts the captured light source signal into a digital signal. The aforementioned sensor may be: a complementary metal oxide semiconductor (Complementary Metal Oxide Semiconductor, CMOS) sensor or a charge-coupled device (Charge-coupled Device) sensor. [0004] CMOS sensors or CCD sensors can output a variety of data formats, such as YUV422, RGB565, RAW, etc., YUV, where "Y" means brightness (Luminance or Luma), that is,...

AI Technical Summary

Problems solved by technology

[0006] Embodiments of the present invention provide a white balance processing method and device for solving the problem of image color cast

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