Multiframe Auto White Balance

Automatic white balancing has the aim of ensuring color consistency of the captured image over a wide range of light sources with different color temperatures. Almost all available automatic white balance techniques contain two main processing steps. Firstly, the illuminant is identified and some gaining coefficients are computed for each color component. After that, the red, green, and blue color components are multiplied with the corresponding gains to obtain the result image. The difference between the majority of the existing solutions rely on the method for gain computation. In this paper we deal with the second step of the AWB procedure where we expose differently each color component instead of multiplying it with a constant.