On 2012-12-31 14:37, Pascal de Bruijn wrote: >>> Does this mean that if I were to create my own input profile based on a >>> test chart and with the correct settings, I would be able to get (more >>> or less) natural looking images without a base curve? > Yes, because a proper (ICC) camera input profile has an XYZ matrix and > curves internally. So it's basically the same thing, just applied in a > single step. So you need to disable the basecurve because otherwise > you'd have two sets of curves being applied on top of each other. Yes, this is exactly what I suspected. So if I were to create my own input profile and shoot with a gray card, I should be able to get the most faithful rendering that is possible (whether this faithful rendering looks good is another matter). > > As written earlier, Darktable uses the Adobe DNG D65 XYZ matrices (via > dcraw). These do not come with curves. Other raw converters supplement > this (visible or not) with an arbitrarily deformed 2.2 gamma curve. We > just took it a step further to provide vendor tuned curves out of the > box which are user visible and controllable. We are very transparent > in that way. Yes, I can see how this approach gives the user more flexibility, which is great! I just needed to understand why my images did not look as expected, and now that I know, I am very happy with the way darktable works. > > So to get a so-called neutral color rendition, anything but a custom > color profile is mostly just an arbitrary choice. > > Now here are some notes on how to do a custom profile for darktable: Thank you very much, this is much appreciated. I am a bit sorry for the effort you put into writing this, as I already watched your excellent screencast about creating custom input profiles. I don't think a separate blog post is needed, the screencast is really great!
Again, thank you for your work and your help, it is greatly appreciated. And have a great new year :) Regards, Eckhart Pedersen ------------------------------------------------------------------------------ Master Visual Studio, SharePoint, SQL, ASP.NET, C# 2012, HTML5, CSS, MVC, Windows 8 Apps, JavaScript and much more. Keep your skills current with LearnDevNow - 3,200 step-by-step video tutorials by Microsoft MVPs and experts. SALE $99.99 this month only -- learn more at: http://p.sf.net/sfu/learnmore_122412 _______________________________________________ Darktable-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/darktable-users
