Fixing skin grain in dark room


(Haakon Meland Eriksen) #1

Iain Fergusson’s “Noise reduction 5” seems to fix skin grain in a dark room - see sample and the applied filter result below. My question is: why does this work?

If someone has written something like Grokking the GIMP by Carey Bunks for G’MIC explaining how this works, a link would be appreciated. I would really like to understand what I am doing rather than just doing it. :slight_smile:


(David Tschumperlé) #2

have you seen this page : https://iainisbald.wordpress.com/2013/02/09/iains-noise-reduction-for-gmic-and-gimp/ ?
it could give some insights.
Also I’m sure @Iain could help !


(Haakon Meland Eriksen) #3

No, I have not - thank you, David! :slight_smile:


(Haakon Meland Eriksen) #4

The article you linked to pointed me in the right direction, and I found http://www.cambridgeincolour.com/tutorials/image-noise-2.htm , which gave me the background understanding I needed. Thank you again! :slight_smile: