Adding in Noise Profiles for the Pixii A2572 camera.

[JonHrovath]

Added in a set of noise profiles to the noiseprofiles.json file for the Pixii A2572 camera. I also added the maker of 'PIXII SAS' to the noiseprofiles.schema file after my checks failed.

One note is that I had to manually change the name for the "maker" from 'Pixii' to 'PIXII SAS' to get darktable to automatically link the profile to the image in the develop module. This is on line 7925 of the changed file.

darktable-noiseprofile-20250501.tar.gz

[TurboGit]

Hi, I think your pattern has not a good transition to the pure white. The graph starting at 3200 ISO is quote chaotic to me.

See the green curve that should be mostly straight, here at 0.5 the oscillation are possibly wrong:

Could you try with a pattern with a better transition from mid-light to pure white?

[kmilos]

One note is that I had to manually change the name for the "maker" from 'Pixii' to 'PIXII SAS'

Comes from here I think:

darktable/tools/noise/subr.sh

Lines 332 to 335 in 8d1ccdb

	if [ "$maker" != "DJI" ] && [ "$maker" != "LGE" ]; then
	# ensure name is capitalized
	maker=$(echo $maker | cut -c 1 | tr "[a-z]" "[A-Z]")$(echo $maker | cut -c 2- | cut -d " " -f 1 | tr "[A-Z]" "[a-z]")
	fi

If there is a strong preference, we could potentially introduce a normalization in RawSpeed ('PIXII SAS' -> 'Pixii' w/ 'Pixii Camera (A2572)' -> 'A2572'), i.e. along the lines of what is done for Leicas?

OTOH, we already didn't prettify some other less known brands like 'Raspberrypi' and 'YI TECHNOLOGY'...

In any case, would you mind uploading a sample to https://raw.pixls.us/ and/or share one via a file transfer link?

[JonHrovath]

Hi, I think your pattern has not a good transition to the pure white. The graph starting at 3200 ISO is quote chaotic to me.

See the green curve that should be mostly straight, here at 0.5 the oscillation are possibly wrong:

Could you try with a pattern with a better transition from mid-light to pure white?

Sure thing. It may take a few days, but I'll get an update pushed.

[JonHrovath]

One note is that I had to manually change the name for the "maker" from 'Pixii' to 'PIXII SAS'

Comes from here I think:

darktable/tools/noise/subr.sh

Lines 332 to 335 in 8d1ccdb

	if [ "$maker" != "DJI" ] && [ "$maker" != "LGE" ]; then
	# ensure name is capitalized
	maker=$(echo $maker | cut -c 1 | tr "[a-z]" "[A-Z]")$(echo $maker | cut -c 2- | cut -d " " -f 1 | tr "[A-Z]" "[a-z]")
	fi

If there is a strong preference, we could potentially introduce a normalization in RawSpeed ('PIXII SAS' -> 'Pixii' w/ 'Pixii Camera (A2572)' -> 'A2572'), i.e. along the lines of what is done for Leicas?

OTOH, we already didn't prettify some other less known brands like 'Raspberrypi' and 'YI TECHNOLOGY'...

In any case, would you mind uploading a sample to https://raw.pixls.us/ and/or share one via a file transfer link?

Will do. I don't have a file that fits the criteria yet (daylight, well lit, low ISO file that hasn't been touched by anything else), but I will take some this weekend and get them uploaded. Brand new camera to me and just starting to get all of this organized.