One-push white balance

For white balance, in total a number of frames are processed and a grid of a number of samples is equally spread over the whole image area. The R-G-B component values of the samples are added and are used as actual values for both the one-push and the automatic white balance. This feature uses the assumption that the R-G-B component sums of the samples are equal; i.e., it assumes that the average of the sampled grid pixels is to be monochrome.