Method for coding pixels or voxels of a digital image and a method for processing digital images

A method for coding pixels or voxels of a digital or digitalized two dimensional or three dimensional image includes the steps of: providing a digital image in which each pixel or voxel is defined by a variable in a grey scale image, or by HSV or RGB values in a color image; generating a vector univocally associated to the target pixel or voxel and having components generated as a function of the values of the pixels or voxels in a window that includes the target pixel or voxel and neighboring pixels or voxels. The function of the values of the target pixel or voxel and of the pixels or voxels in the window corresponds to the characteristic parameters of the numerical matrix representing the pixels or voxels of the window or of a transformation of the numerical matrix.