Did you notice that I am interested with/attracted by Artificial Intelligence? Among various tests, here is a nice little resulting application for digital photographers. I finally found how to significantly (x4) increase the resolution of my photographic pictures (upscaling) without loss of details.
An AI allowed me to recreate the “missing pixels” to build a picture that is several times larger than the original; ideal for an ultralarge print.
the full description is on YLovePhoto: “Upscaling a photo with free AI“.