Hi, I'm sure this has been discussed before, but I just can't find it. Why is it that given the same shot, darktable/digiKam (showfoto) and UFRaw/RawTherapee display different values for temperature and tint? Process: 1. open grey card (WhiBal) shot in darktable and ufraw. 2. read spot white balance in darktable -> card really turns grey 3. note RGB multiplier values (in my case: 1.139, 1, 2.633) and temperature/tint (3447K and 1.138) 4. open image in ufraw, set the same RGB multipliers -> card turns grey, temperature and tint very different (2570K, green: 0.95) 5. open image in showfoto, set WB to manual, enter darktable's values (T: 3447K, Green: 1.14) -> card turns grey 6. open image in rawtherapee, apply ufraw's values (Temperature: 2570, Tint: 0.95) -> card turns grey
If memory serves me well, RT is based of dcraw; ufraw too, while darktable uses both rawspeed and libraw (dcraw), but I think for my Nikon D7000 it's rawspeed. Is this related? How is one to interpret temperature? For higher temperatures, the difference is smaller, but still present, e.g. a sunlit shot with camera white balance is shown with temperature = 5291K in darktable and as 4710K in RT; a shot in partial shade 6124K in dt and 5928K in RT (reading the same camera multipliers). Thanks, Kofa ------------------------------------------------------------------------------ Download BIRT iHub F-Type - The Free Enterprise-Grade BIRT Server from Actuate! Instantly Supercharge Your Business Reports and Dashboards with Interactivity, Sharing, Native Excel Exports, App Integration & more Get technology previously reserved for billion-dollar corporations, FREE http://pubads.g.doubleclick.net/gampad/clk?id=164703151&iu=/4140/ostg.clktrk _______________________________________________ Darktable-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/darktable-users
