About "colour.RGB_to_RGB" definition chromatic adaptation default.

[scoopxyz]

source

This is a bit of a null issue, as I can already see both sides of the argument, but I just wanted to prompt a discussion around defaulting to using white point adaptation when creating RGB to RGB matrices, and whether people prefer the opt-out rather than opt-in model.

[KelSolaar]

Hi Sean,

I think in the usage of the API so far I have more instances where I want to perform the adaptation than instances where I don't. What about you?

[KevinJW]

Mine are in the order CAT02 (colour science, ACES, most camera vendors), Bradford (ICC/Photoshop, Red), XYZ scaling only (Baselight), None (replication of something else that is usually doing it wrong :-)

other CATs are for matching historical reasons or in specific situations.

Kevin

[scoopxyz]

Yeah, I don't know why but it just struck me as odd when I noticed it was there. I've been playing around with using alternate white points for DCI P3 and ACES AP1 incarnations, which I can clearly accomplish via abother route, but just wanted to see if I was the only one who wasn't expecting it to be there. Seems that way :)

[nick-shaw]

I would say my order is the same as Kevin's. The only time I use no CAT is for matrices for ACES "D60 sim" ODTs.

[scoopxyz]

Thoroughly convinced with the present implementation :) Is there an ongoing forum of conversation outside of Issues ?

[KelSolaar]

@scoopxyz: Indeed! I'll ping you offline!