1. A method for generating a dataset of real noise images, the method comprising: acquiring a set of images of a scene, the set of images comprising a low-noise reference image, at least one noisy image and a low-noise clean image of the scene, the low-noise reference image, the at least one noisy image and the low-noise clean image comprising a plurality of pixel intensities, wherein each of the plurality of pixel intensities comprises a first plurality of bits; mapping the first plurality of bits of each of the pixel intensities of the low-noise reference image to a second plurality of bits using a linear mapping, wherein the second plurality of bits is less than the first plurality of bits; mapping the first plurality of bits of each of the pixel intensities of the at least one noisy image and the low-noise clean image to a second plurality of bits using an energy minimization linear mapping to align the at least one noisy image and the low-noise clean image with the reference image, wherein the second plurality of bits is less than the first plurality of bits; and storing the set of scene images mapped to the second plurality of bits in a dataset of real noise images.