1. A method for obtaining a high-resolution digital image from a plurality of starting images formed by pixel matrices acquired at a lower resolution, said method comprising the phases of: combining the plurality of starting images to generate a provisional high-resolution image, producing from the provisional high-resolution image a further plurality of low-resolution images, each of said images corresponding to a respective image of the plurality of starting images, at least partially processing the provisional image by modifying pixels of this image to reduce a difference between corresponding images of the plurality of starting images and said further plurality, characterized in that the phase of processing the provisional image comprises phases of: associating with pixels of the provisional image a respective measure representing the uncertainty of the pixels, leaving unmodified at least a subset of pixels of the provisional image with which there is associated a respective uncertainty measure smaller than a predetermined threshold value.