Am 31.12.2012 01:14, schrieb Eckhart Pedersen: > On 2012-12-31 00:03, Jose Carlos Garcia Sogo wrote: >> One post on behalf of Pascal de Bruijn > Very much appreciated, thank you! >> Hi, >> >> Time to get some confusion out of the way. >> >> A typical complete camera input profile consist of two things: curves >> and an XYZ matrix. >> >> The default color processing of Darktable (and most other open source >> raw converters) use the Adobe DNG D65 XYZ color matrix (camera >> specific), but that means the curve is missing. Which we complement by >> applying a mostly brand specific basecurve. > 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?
No. You need both. The XYZ matrix for color mapping and the curve for brightness mapping. darktable is already doing its best to provide you a "natural" looking image, natural by definition of your camera vendor. [...] >> So if you disable the basecurve in darktable it's completely expected >> that a RAW files will look dull, since the data is still linear (at >> least to the extent that the raw sensor data is linear to begin with) >> then. > I did not expect this. Again, if I do my own input profile (and do it > correctly), would I not be able to do without the base profile? Profile == XYZ + base curve. You can not avoid the base curve. >> The difference between the curves: >> Basecurve in camera RGB (before colorin) >> Tonecurve in Lab colorspace (after colorin) > Right now I do not understand what you are saying, but it is late and I > may have been drinking too much wine. If I have further questions, I > will post them tomorrow... >> This is made visible by turning off plugin grouping in darkroom mode, >> which I've demonstrated time and time again in my screencasts, > My apologies, I have not seen all screencasts. I will try to catch up > tomorrow. >> so you >> can see the static order in which plugins are applied (bottom to top). >> These plugins account for everything being done, not just >> "corrections". I this topic has been addressed because of Marie-Noelle. Regards, Markus ------------------------------------------------------------------------------ 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. ON SALE this month only -- learn more at: http://p.sf.net/sfu/learnmore_123012 _______________________________________________ Darktable-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/darktable-users
