1. A computer-implemented method for estimating a chromaticity value of raw image data, comprising: receiving color channel values of a raw image data block; normalizing the color channel values with a white point correction factor; determining one or more first image chromaticity weights by quantifying a disparity among the normalized color channel values; determining a first white point estimate as a function of the one or more first image chromaticity weights; and storing the first white point estimate to a memory.