Camera Support #12608
Noise profile: Canon PowerShot SX160 IS
Noise profile for Canon PowerShot SX160 IS using chdk.
#2 Updated by rawfiner - 3 months 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. :-)
#8 Updated by rawfiner - about 2 months ago
Please could you try making the profiles again, after the following changes:
- copy darktable-gen-profile to old-darktable-gen-profile
- open the darktable-gen-profile file with a text editor
- change these lines:
set xrange [0:0.35] fit f1(x) "$dat" u 1:(\$2**2):(1/max(0.01, \$5)) via a1,b1 set xrange [0:0.8] fit f2(x) "$dat" u 1:(\$3**2):(1/max(0.01, \$6)) via a2,b2 set xrange [0:0.5]
set xrange [0.1:0.35] fit f1(x) "$dat" u 1:(\$2**2):(1/max(0.01, \$5)) via a1,b1 set xrange [0.1:0.8] fit f2(x) "$dat" u 1:(\$3**2):(1/max(0.01, \$6)) via a2,b2 set xrange [0.1:0.5]
Then, save the file, and remake the profiles
#10 Updated by rawfiner - about 1 month ago
Thanks. Look ok to me.
I created a pull request: https://github.com/darktable-org/darktable/pull/2447