Hi
I just downloaded a free copy of a noise reduction application called Noiseware Community Edition from
http://www.imagenomic.com/ to see how useful it is.
Image 1 (this post) is without Noiseware and looks gritty.
Image 2 (second post) is after using Noiseware with the default settings and it looks much more pleasing.
The image is of the Tarantula Nebula taken at the Qld Astrofest in 2004 with vixen 4" refractor and an ST7E SBIG ccd camera.
Looks like an excellent free program to improve certain images.
Cheers
Dennis