Camera Support #12608

Noise profile: Canon PowerShot SX160 IS

Added by Hartmut Knaack 25 days ago. Updated 14 days ago.

Target version:
Start date:
Due date:
% Done:


Affected Version:
git master branch


Noise profile for Canon PowerShot SX160 IS using chdk.

darktable-noiseprofile-20190224.tar.gz (6.53 MB) Hartmut Knaack, 02/24/2019 01:39 AM


#1 Updated by rawfiner - 24 days ago

  • Category set to Darkroom
  • Assignee set to rawfiner -

#2 Updated by rawfiner - 24 days ago

Just to be sure, is that all the possible ISO values for this camera? I mean, for instance, no value in between 800 and 1600?
The profile fits nicely for lower ISO values, but I am not confident about the values above ISO 1600 (included). It would be nice if you could remake the noise profile with a different set of images to be able to confirm the values obtained. :-)

#3 Updated by Hartmut Knaack 24 days ago

The official camera firmware offers ISOs 100, 200, 400, 800 and 1600. The chdk-firmware-extension allowed to choose any custom ISO value from about 10 to 10000.
However, I don't possess this camera any more, so this is the only data I can provide.

#4 Updated by Anonymous 23 days ago

Spam deleted.

#5 Updated by rawfiner - 16 days ago

Ok, so I am afraid the only thing we can do is waiting to see if with a later version of the noise profiling tool we get better results...
Please keep your raw files, to be able to redo the profiling if it gets updated.

#6 Updated by Hartmut Knaack 16 days ago

OK. Will anyone update this ticket, once the tool received a significant update?
And can anyone point out, what kind of improvement is desired?

#7 Updated by rawfiner - 14 days ago

Yes, I will let you know.
Basically, (among other things) the curve fitting code could maybe be improved, which would maybe result in an improvement for your images.

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