Hallöchen! Dennis Gnad writes:
> On 19.10.2013 20:40, Torsten Bronger wrote: > > [...] > > What would be interesting for me, maybe you can take one more shot > which shows some LCA and still has a bit more different colors in > the picture if possible. Selectively desaturating the *right* > parts can be a problem. Have a look at these: https://bob.ipv.kfa-juelich.de/bronger/lca2/ They are more critical because they are more colourful in general. If I set your module parameters to max values, the red patch to the lower right of the bear face gets desaturated at its edges. Similarly, I can desaturate the greenish top crown of the tower by setting extreme values. However, in both cases I can successfully remove almost all LCA without doing harm to the colours. Sometimes, it was a little bit fiddly but is is *very* promising. BTW, what does the "threshold" slider mean? > [...] > >> The module works well but I have to set "threshold" to the >> minimum always. Furthermore, I set the green/magenta slider to >> the far right, and the "blue/yellow" slider to the far left. >> After all, the short wavelengths are the problem. > > [...] > > What I want to remove is the wavelength dependent focal length > (LCA) issue that Adobe describes like: > > "Fringes typically appear purple/magenta when they’re in front of > the plane of focus, and appear green when they’re behind the > plane" You are absolutely right. I now have understood the physics behind it. You can see that I have created different fringe colours in the bear face by having played with the focus. However, I find the two sliders a little bit confusing. They are there for selecting one particular colour on the a-b plane, aren't they? Then, it is difficult to see which colour was selected. Since the green-magenta slider is supposed to be much more important for LCA than the blue-yellow slider, maybe the blue-yellow slider should change its colour bar according to the first one. Or, an a-b colour square should be displayed where you can select the colour, possibly with a picker. Tschö, Torsten. -- Torsten Bronger Jabber ID: [email protected] or http://bronger-jmp.appspot.com ------------------------------------------------------------------------------ October Webinars: Code for Performance Free Intel webinars can help you accelerate application performance. Explore tips for MPI, OpenMP, advanced profiling, and more. Get the most from the latest Intel processors and coprocessors. See abstracts and register > http://pubads.g.doubleclick.net/gampad/clk?id=60135991&iu=/4140/ostg.clktrk _______________________________________________ darktable-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/darktable-devel
