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Camera Support #11200

Nikon D3000 noise profiles, poor fit

Added by Rory Gamble over 2 years ago. Updated almost 2 years ago.

Status:
Fixed
Priority:
Low
Assignee:
-
Category:
-
Target version:
Start date:
10/06/2016
Due date:
% Done:

100%

Affected Version:
2.0.6

Description

I attach my first attempt at noise calibration of a Nikon D3000. The plots for higher isos (800-3200, see e.g. second page of DSC_0006.pdf) don't look very good at all. Any advice you can give on improving the re-taking the pictures and/or improving the fit would be appreciated.

dt-noiseprofile-20161006.tar.gz (1.89 MB) Rory Gamble, 10/06/2016 10:53 PM

DSC_0670.NEF - D3000 - ISO 100 - RAW (NEF) (6.95 MB) Caleb Gregory, 12/22/2016 12:25 AM

DSC_0671.NEF - D3000 - ISO 200 - RAW (NEF) (7.35 MB) Caleb Gregory, 12/22/2016 12:25 AM

DSC_0672.NEF - D3000 - ISO 400 - RAW (NEF) (7.74 MB) Caleb Gregory, 12/22/2016 12:26 AM

DSC_0673.NEF - D3000 - ISO 800 - RAW (NEF) (7.98 MB) Caleb Gregory, 12/22/2016 12:26 AM

DSC_0674.NEF - D3000 - ISO 1600 - RAW (NEF) (8.49 MB) Caleb Gregory, 12/22/2016 12:27 AM

DSC_0675.NEF - D3000 - ISO Hi1 (3200) - RAW (NEF) (8.99 MB) Caleb Gregory, 12/22/2016 12:27 AM

dt-noiseprofile-20170204.tar.gz (1.74 MB) Rory Gamble, 02/04/2017 01:33 PM

Associated revisions

Revision fe8985c2
Added by Stefan Schöfegger almost 2 years ago

noise profile: Add Nikon D3000, fixes #11200

Revision da37372e
Added by Roman Lebedev almost 2 years ago

Merge pull request #1502 from schenlap/noise_nikon_d3000

noise profile: Add Nikon D3000, fixes #11200

History

#1 Updated by Rory Gamble over 2 years ago

I attach my first attempt at noise calibration of a Nikon D3000. The plots for higher isos (800-3200, see e.g. second page of DSC_0006.pdf) don't look very good at all. Any advice you can give on re-taking the pictures and/or improving the fit would be appreciated.

#2 Updated by Stefan Schöfegger over 2 years ago

Yes, you are right, 800-3200 does not look good. Can you do some brighter shots? Your shots motly contain under- and overexposed areas, less in between.

#3 Updated by Roman Lebedev over 2 years ago

  • Status changed from New to Incomplete
  • % Done changed from 0 to 20

#4 Updated by Rory Gamble over 2 years ago

Thanks for the reply. Following the guide here:
http://www.darktable.org/2012/12/profiling-sensor-and-photon-noise/
I struggled to make them "have a widespread histogram, i.e. be over- and underexposed at the same time" so I probably put too much emphasis on that. I will make another attempt and post the results here. Suggestions on a good subject for the photos would be welcome.

#5 Updated by Stefan Schöfegger over 2 years ago

That's right you need under and overexposed areas. Try to make these areas smaller.
I don't have much experience with noise profile, I only had done some testimages for it until now. I got the best result pointing a flashlight to the camera and illuminate the foreground with it. Have a dark backgronud behind the scene to get an underexposed area.

#6 Updated by Caleb Gregory over 2 years ago

Here are a few test images from my D3000. There are one of each of the iso settings. (100, 200, 400, 800, 1600, and Hi1 (3200))

#7 Updated by Rory Gamble about 2 years ago

I ran Caleb Gregory's NEF files through the calibration script. It only took me 5 months to get around to it! The results look a lot better. I attach the .tar.gz file. Would appreciate a more experienced person having a look at the fitted curves. Thanks!

#8 Updated by Stefan Schöfegger almost 2 years ago

Yes, result look much better now. I create a pullrequest for it.

#9 Updated by Stefan Schöfegger almost 2 years ago

  • Status changed from Incomplete to Fixed
  • % Done changed from 20 to 100

#10 Updated by Roman Lebedev almost 2 years ago

  • Target version set to 2.4.0

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