Create detail in noisy or unfocused images

Submitted by The Daily Photography of Andreas Manessinger » This technique is pretty effective on noisy images or images with focus problems that you nevertheless want to print in high resolutions. It does two things: accentuate what edges are there, and increase detail, but both without increasing noise. Of course this is invented detail, but sometimes it does not matter what details you have, it suffices that there is detail at all.