Darktable 3.0 noiseprofiles.json

Software darktable
1

Some time ago, I generated noise profiles for my EOS R using DNGs converted with Adobe DNG. They worked amazingly well in previous versions of Darktable, 2.4/2.6. When modifying the noiseprofiles.json for 3.0, it won’t recognize the profiles, offering only generic poissonian. To get them working in previous versions, I actually had to add Canon to the model name (Canon EOS R as opposed to just EOS R) for some reason. I’ve tried both ways and it still doesn’t work.

Any thoughts on what I’d need to tweak to get them back working again?

Thanks.

JPWhite

2

The name should be whatever exiv2 sees the camera name as.

You should submit your noise profile to the project so others can have it too :slight_smile:

3

I submitted a ticket on Redmine some time ago to add the noise profiles, however, once the .CR3 decoder ring has been found, I suspect the profile generation tool may come back with a different profile. I’ll paste what I’m using now below, but suspect a fresh go will be needed with .CR3s. I’ve kept the .CR3s I converted to .DNGs so I can readily reproduce a profile when the time comes.

All that said, I’m still unsure why the profile isn’t working in 3.0. The model returned from exiv2 is Canon EOS R so… I’m not sure what to poke at next. Here’s the exiv2 return too. I attached the .DNG file if anyone wants to give it a go on their end. 4F6A4584.dng (33.1 MB)

File name : 4F6A4584.dng
File size : 34660086 Bytes
MIME type : image/tiff
Image size : 6888 x 4546
Camera make : Canon
Camera model : Canon EOS R
Image timestamp : 2019:12:27 07:42:22
Image number :
Exposure time : 1/100 s
Aperture : F5
Exposure bias : 0 EV
Flash : No flash
Flash bias :
Focal length : 50.0 mm
Subject distance:
ISO speed : 200
Exposure mode : Shutter priority
Metering mode : Multi-segment
Macro mode :
Image quality :
Exif Resolution : 6888 x 4546
White balance : Auto
Thumbnail : None
Copyright :
Exif comment :

My EOS R model insert…

    {
      "comment": "eos r contributed by jpwhite",
      "model": "Canon EOS R",
      "profiles": [
        {"name": "EOS R iso 100", "iso": 100, "a": [6.92656806661505e-06, 3.14604807966481e-06, 4.60046560578534e-06], "b": [7.16850931273329e-11, 2.10802626659369e-09, 2.14619954880318e-09]},
        {"name": "EOS R iso 125", "iso": 125, "a": [8.22887218569405e-06, 3.73713724813288e-06, 5.47880519146885e-06], "b": [1.07221844174494e-09, 2.87860600768459e-09, 3.68184874569179e-09]},
        {"name": "EOS R iso 160", "iso": 160, "a": [1.11842350561284e-05, 5.0658746345724e-06, 7.5146544938165e-06], "b": [1.73758684937515e-09, 3.12393347022287e-09, 3.7060368700133e-09]},
        {"name": "EOS R iso 200", "iso": 200, "a": [9.69555071093545e-06, 4.40302710378232e-06, 6.45429457777673e-06], "b": [1.71145237845662e-10, 2.41761261006371e-09, 2.55645257237882e-09]},
        {"name": "EOS R iso 250", "iso": 250, "a": [1.15121171386242e-05, 5.23369798031248e-06, 7.73307910814592e-06], "b": [1.72344065222356e-09, 4.04064708159235e-09, 4.18276564119982e-09]},
        {"name": "EOS R iso 320", "iso": 320, "a": [2.25817702440996e-05, 1.02350394905008e-05, 1.51275537502662e-05], "b": [3.36751942353933e-09, 7.64647214032798e-09, 7.74796376391125e-09]},
        {"name": "EOS R iso 400", "iso": 400, "a": [1.85448545500614e-05, 8.43248691471839e-06, 1.25119255592381e-05], "b": [2.525058637684e-09, 5.0412826969146e-09, 5.70217883864324e-09]},
        {"name": "EOS R iso 500", "iso": 500, "a": [2.23223155203416e-05, 1.01322934950446e-05, 1.51091332081711e-05], "b": [4.85459880623622e-09, 7.62658744345046e-09, 9.04583599129288e-09]},
        {"name": "EOS R iso 640", "iso": 640, "a": [3.93484302741449e-05, 1.78923264975954e-05, 2.67412060603289e-05], "b": [1.19197354053783e-08, 1.50761989415895e-08, 1.69010485478514e-08]},
        {"name": "EOS R iso 800", "iso": 800, "a": [3.27590027849959e-05, 1.49071157048801e-05, 2.2242807159803e-05], "b": [8.17494890432829e-09, 1.06204490783371e-08, 1.22489271985387e-08]},
        {"name": "EOS R iso 1000", "iso": 1000, "a": [3.99129876830888e-05, 1.81274205476525e-05, 2.71256980270295e-05], "b": [1.47606556366817e-08, 1.62965643340715e-08, 1.81690008388968e-08]},
        {"name": "EOS R iso 1250", "iso": 1250, "a": [7.17301025729529e-05, 3.24924253283658e-05, 4.87206732024208e-05], "b": [3.3442103802021e-08, 3.27222974149751e-08, 4.09563336970369e-08]},
        {"name": "EOS R iso 1600", "iso": 1600, "a": [6.01721757793867e-05, 2.72364921750762e-05, 4.07813550929171e-05], "b": [2.32971441397347e-08, 2.30208238689304e-08, 2.95799885475556e-08]},
        {"name": "EOS R iso 2000", "iso": 2000, "a": [7.15982332023351e-05, 3.23572893981952e-05, 4.84454186175397e-05], "b": [3.84703353477808e-08, 3.47305680409852e-08, 4.50300193454703e-08]},
        {"name": "EOS R iso 2500", "iso": 2500, "a": [0.000128703624564505, 5.8280391023294e-05, 8.79604327220664e-05], "b": [9.27314581859474e-08, 8.44662511225489e-08, 1.00754884795138e-07]},
        {"name": "EOS R iso 3200", "iso": 3200, "a": [0.000106928109774017, 4.82427902162975e-05, 7.18940074161269e-05], "b": [7.04205090086082e-08, 6.1458326041465e-08, 7.41508769838861e-08]},
        {"name": "EOS R iso 4000", "iso": 4000, "a": [0.000130315447910687, 5.90060966706537e-05, 8.77451896544504e-05], "b": [1.05048826221685e-07, 8.60377028196625e-08, 1.06646297343161e-07]},
        {"name": "EOS R iso 5000", "iso": 5000, "a": [0.000233961619734701, 0.000105825672392548, 0.000158510786997923], "b": [2.44133225622344e-07, 2.00812416087667e-07, 2.43689191512375e-07]},
        {"name": "EOS R iso 6400", "iso": 6400, "a": [0.000193770979457606, 8.76104742426822e-05, 0.000127811577288436], "b": [1.90374365378667e-07, 1.46475881044968e-07, 1.89739409235082e-07]},
        {"name": "EOS R iso 8000", "iso": 8000, "a": [0.000233993205619561, 0.000106232238866213, 0.000153572599697728], "b": [2.78943088069114e-07, 2.05201460159681e-07, 2.70839179936491e-07]},
        {"name": "EOS R iso 10000", "iso": 10000, "a": [0.00042021451215044, 0.00019116536059121, 0.000281086224551659], "b": [7.17298578595228e-07, 5.83260703803598e-07, 7.42719122193084e-07]},
        {"name": "EOS R iso 12800", "iso": 12800, "a": [0.000343867440120573, 0.000157431839157933, 0.000221125191012974], "b": [5.71805057673237e-07, 4.37916871569013e-07, 5.7276565964461e-07]},
        {"name": "EOS R iso 16000", "iso": 16000, "a": [0.0004194500682201, 0.000193236483567043, 0.000268570102705149], "b": [8.46233341009642e-07, 6.50466856015346e-07, 8.66499015742129e-07]},
        {"name": "EOS R iso 20000", "iso": 20000, "a": [0.000752246439994318, 0.00035206303744053, 0.000499715096101841], "b": [2.63403533902916e-06, 2.15552716619563e-06, 2.64048962524288e-06]},
        {"name": "EOS R iso 25600", "iso": 25600, "a": [0.000617891346160767, 0.000291101960331901, 0.000389219698979584], "b": [1.92014245586638e-06, 1.57275809539729e-06, 1.96776655733866e-06]},
        {"name": "EOS R iso 32000", "iso": 32000, "a": [0.000765990119973458, 0.000369383631368527, 0.000480148567580391], "b": [3.20107991323099e-06, 2.63495639332145e-06, 3.28258697498535e-06]},
        {"name": "EOS R iso 40000", "iso": 40000, "a": [0.000906143687244743, 0.000441076997188701, 0.000568708314868181], "b": [4.82956564185019e-06, 4.13512450275918e-06, 4.91704795550686e-06]}
      ]
    }
4

Doh!

I had inserted the profile, but failed to end it with a , after it’s last curly bracket! Works fine now.