Am Montag, 16. Januar 2017, 10:30:02 CET schrieb Anton Aylward: > My Sony camera has a "picture" setting that produces an image that brings > out one primary color and makes the rest of the scene B&W. You've > probably seen this kind of effect in advertising. > > The downside of using this in-camera option is that it (a) only works for > the 3 primary colours and (b) only works in JPG mode, not RAW. > > I prefer to use RAW and post-process since I can also do things like deal > with skylines and shadows, so I wonder how I would do this in DT after I've > done that basic processing. > > If this is a single discrete object such as a red sport scar in the midst of > otherwise banal traffic, such a I've seen in adverts, then its easy enough > to crop. But there are many situations where the colour you want is > distributed, perhaps the green of trees on a street scene. > > As I say, this only works for primary colours. I can think of a few > photographs I've got where I'd like to apply this technique but the color I > want to bring out isn't primary. > > Other then simply killing the green and blue in a color profile, what can I > do about the sport car scene? or red and blue in the trees in the street > scene?
https://www.darktable.org/2012/07/some-enhancements-to-conditional-blending/ might have some hints.
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