Martin Egger wrote:
- Color noise is sharpened too much with a sharpening setting of 3+ for ISO100
or 2+ for ISO1600. Maybe some more selectable parameters are needed here (like
radius and threshold in USM)? Or include some logic with modifies such
parameters based on the ISO?
We need to find the magic way to do this. I'm looking at some denoising
to be run before sharpening, maybe this will help. Any ideas are welcome :)
I think, denoising and sharpening should be independent of each other and
user-selectable, so denoising an image by default when sharpen it, might not be
the best idea? Using standard USM parameters might be more transparent to the
user. Or have a table with different USM parameters for different ISO settings
within the program logic - but I don't know if you did implement USM code.
I've tried to put threshold into the sharpen function:
http://rawstudio.org/files/patches/akv/rev1549_sharpen_with_threshold.patch
I tested it with some rather hard sharpening and it does seem to work,
but it does creates some odd artifacts. There must be a way to handle
this. But first, is this patch better or worse?
/Anders
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