Different approaches to removing digital noise from photos.
Various ways to try to eliminate digital noise from a low light/high iso shot.
1. original
2. As described in Katrin Eismann's book on Photoshop Resstoring and Retouching.
3. As described in Scott Kelby's book "Photoshop CS for Digital Photographers" on pp 82-83.
4. As described in Dan Margulis' book "Photoshop LAB Color : The Canyon Conundrum and Other Adventures in the Most Powerful Colorspace"
5. As described in Scott Kelby's book "Photoshop CS for Digital Photographers" on pp 84.
These are not exhaustive tests, but just a way for me to try several methods and pick one or two for frequent use and have a shortcut to reference.