Le 09/08/2013 15:24, Torsten Bronger a écrit : > If I understand Google hits to "Melissa RGB" correctly, Lr uses that > only for the RGB colour picker and the histogram. Internally, it > uses a linearised ProPhoto RGB (which happens to have the same > primaries as Melissa RGB).
In my book it says it uses Melissa RGB internally too. But who knows :) > I'm suprised actually -- would have thought that Lr also uses Lab. > Also, the choice of such a wide-wide gamut RGB suggests that Lr uses > 16 bit non-negative integers, which means that Lr is colour blind in > some areas. But the Google hits are from 2008. Moreover, some web > pages seem to mix-up "colour space used for image processing" and > "colour space used for the histogram". Again, if my book is correct (and this book seems quite good and the writer quite knowledgeable) it is still the case. So Lr seems to be still using 16 bits integer in the 4.x version. Don't know for 5.x, but I doubt it has changed since this version has very little change in the processing and image quality. Pascal. -- Pascal Obry / Magny Les Hameaux (78) The best way to travel is by means of imagination http://v2p.fr.eu.org http://www.obry.net gpg --keyserver keys.gnupg.net --recv-key F949BD3B ------------------------------------------------------------------------------ Get 100% visibility into Java/.NET code with AppDynamics Lite! It's a free troubleshooting tool designed for production. Get down to code-level detail for bottlenecks, with <2% overhead. Download for free and get started troubleshooting in minutes. http://pubads.g.doubleclick.net/gampad/clk?id=48897031&iu=/4140/ostg.clktrk _______________________________________________ darktable-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/darktable-devel
