You have seen an image on your monitor (or phone, tablet, whatever) created by its display drivers and display hardware from information encoded from a scan of a print, manipulated who knows how (I always tweak mine to try to make the scans look more like my print, at least on MY monitor) and sent over the web.
You haven't seen a PRINT on this site unless someone in your house taped one over your monitor.
Or you've participated in one of the APUG print exchange activities. For better or worse, THAT is the only sure way to accurately and correctly experience an image on APUG.
I'd encourage everyone to try one of these exchanges. But be forewarned, if you expect what you are eventually holding in your hands from an exchange participant to look exactly like what you are seeing from his or her print scan in an APUG gallery, you are going to be sorely disappointed.