Damb, there I was viewing a very interesting thread on the above, prepared a post, and bingo, thread gone !.
Dunno, I maybe im just stupid and just cant find it. Anyway,
here are 2 mean stacked images, with each of the above applied, uncompressed scaled TIFFs with no data reject or any processing of any kind. Average amount of noise.
Id like to understand the thoretical arguments with reference to actual images, if the original posters could please peruse and comment.