From my understanding this is a software technique that identifies "stuck" or "dead" pixels and extrapolates what the pixel or pixels would interpret if they were still functional but evaluating pixels around "stuck" or "dead" pixel or pixels and replaces it with this information. Is this accurate ? Also how do people use this ? I have done this only once since owning my camera. It doesn't actually show an image just does some processing and thats it, I guess if I don't notice anything then its fine.