On 27/10/15 08:00, Matthieu Moy wrote: > The future dt 2.0 has a wb setting called "camera neutral white balance" > which didn't show up with dt 1.6. > > What is it meant to be? What is its use?
From the #darktable IRC chat log: [01:18.24] <houz> what exactly is camera neutral wb? we didn't have that before [01:19.34] <LebedevRI> (i have answered that before, let me answer it again) [01:19.50] <LebedevRI> it is auto-generated from adobe camera matrix [01:20.40] <houz> what is it good for? [01:21.21] <houz> we should document that in the usermanual [01:21.43] * houz is currently updating de.po and tries to understand things to find a good name [01:22.36] <LebedevRI> basically, it is the wb which "converts" (camera-rgb)(1,1,1) into (rgb)(1,1,1) [01:23.57] <houz> so it's a non-green passthrough [01:24.11] <LebedevRI> so it is always the same for the same matrix, will be mostly correct for every light situation (thus, can be used as basic fallback auto-wb) [01:24.17] <LebedevRI> yes, essentially [01:24.47] <houz> not sure if i see a benefit in including that, but it won't hurt either [01:24.49] <LebedevRI> output is kinda correct for camera, but not for color temperature [01:25.44] *** beedaddy (~martin@unaffiliated/beedaddy) has joined #darktable [01:26.06] <houz> so the name "camera neutral white balance" has to be read as "(camera neutral) white balance"? i.e., it is independent from camera? [01:27.49] <LebedevRI> uhm, well. i think, it will be 6504K for every camera, but for every camera it will compute to different wb multipliers [01:28.11] <houz> different multipliers, but the same look? [01:28.29] <houz> so shooting the same scene with a canon and nikon would result in the same image? [01:28.33] <LebedevRI> let me check, ... [01:29.22] *** fmerges (~fmerges@161.72.100.50) Quit (Quit: leaving) [01:31.21] <LebedevRI> [obiviously, i do not have canon AND nikon so i can not do exact comparison] but looking at a shots from canon and nikon in similar light conditions, it does result in the similarly looking image ------------------------------------------------------------------------------ _______________________________________________ Darktable-users mailing list Darktable-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/darktable-users
