Notice of Meeting - Output Transforms Architecture VWG - March 2, 2022

Output Transforms Architecture VWG Meeting

Wednesday, March 2, 2022
1pm Pacific time Add to Calendar (.ics)


Dropbox Paper homepage for this group:

We use the same GoToMeeting URL and phone numbers for all VWG meetings.

You may join via computer/smartphone (preferred) which will allow you to see any presentations or documents that are shared, or you can join using a telephone which will be an audio only experience.

Please note that meetings are recorded and transcribed and open to the public. By participating you are agreeing to the ACESCentral Virtual Working Group Participation Guidelines.

Audio + Video

Please join my meeting from your computer, tablet or smartphone.

Audio Only

You can also dial in using your phone.

Dial the closest number to your location and then follow the prompts to enter the access code.

** United States: +1 (669) 224-3319 **
** Access Code: 241-798-885 **

More phone numbers:

Australia: +61 2 8355 1038
Austria: +43 7 2081 5337
Belgium: +32 28 93 7002
Canada: +1 (647) 497-9379
Denmark: +45 32 72 03 69
Finland: +358 923 17 0556
France: +33 170 950 590
Germany: +49 692 5736 7300
Ireland: +353 15 360 756
Italy: +39 0 230 57 81 80
Netherlands: +31 207 941 375
New Zealand: +64 9 913 2226
Norway: +47 21 93 37 37
Spain: +34 932 75 1230
Sweden: +46 853 527 818
Switzerland: +41 225 4599 60
United Kingdom: +44 330 221 0097

The recording and notes from meeting #43 are now available.

1 Like

Interesting meeting ! If anyone was looking for it, here is the link to Nick´s Gamut Compressor variation (back in July 2020).

Chris

I’ll use this term
Chromaticity-Linear : traveling along a linear line in CIE xy cartesian chromaticity space between some source chromaticity and the achromatic axis of the current RGB colorspace. Does not necessarily imply luminance-preserving.

Looking back at those ancient posts is a good refresher on how much I’ve learned over the last couple years. Jeeze.

A few bits of information which maybe someone will find useful.

The so-called “hexagonal” gamut compression method is just a saturation adjustment: a lerp towards achromatic by some factor. It uses (can use) max(r,g,b) as the norm, and the factor is (can be) a compression of chroma. This results in a chromaticity-linear chromaticity adjustment. The norm could also be luminance or mean of rgb or something else if desired.

More details in the implementations below.
GamutCompress_ChromaticityLinear.nk (1.1 KB)
GamutCompress_ChromaticityLinear.dctl (853 Bytes)

1 Like