Sharpening II. in Photoshop
level: advanced
Basic sharpening procedures (e.g. Unsharp Mask) do not distinguish between details and noise, and therefore they sharpen noise, too. We step up and try to sharpen only the substantial details.
Removing color noise in Photoshop
level: advanced
Noise… the bogeyman! We can almost see digital photographers shiver and shrink. Well, not those who read us.