Thanks Dennis
. It's always good to compare notes
.
I'll do an experiment again and stack more frames and compare. I think my approach has been aimed at maximising the sharp detail, but I have to admit I have suffered from that "gritty" appearance of the apparently smooth surfaces. In some cases that may be real detail that is just exaggerated by sharpening into an artifact
, but in others it is probably a poor S/N due to the number of frames I've stacked.
The other option that I want to explore is to apply a mask to the sharpened image to let an unsharpened layer below show through away from the edges. I have read a tutorial on how to do that ages ago, but I can't find it ATM. It involved using the edge filter to create a mask... I can't remember how to get the edge filtered image to the mask though
.
Al.