Ugh, I hate when that happens. It really depends on how big they are and how many of them there are. Sometimes you can duplicate the layer, mask off an area just to the side of the spot, feather it and move it over the spot. Sometimes it works, sometimes not.
Another option is to mask off the spot on a duplicate layer, and adjust the brightness / contrast on the spot (since spots usually show up as dark). – again, feather the mask so it blends.
Unfortunately though, there is no way to just get rid of the spots… garbage in, garbage out. Good luck!
Ty Audronis
Supervising Editor, California Academy of Sciences/Morrison Planetarium
