Hello Aurélien,
Thanks for the detailed article. Since I was the guy who triggered it (at least, I had part of it and feel addressed by some of the remarks), please let me say that I was never a ‘gamut-alert freak’ – I just watched your video on the colour calibration module, where you mentioned it, and used it, and I noticed that the settings were not the default ones; that was why I asked.
In what space to show histograms ?
Any. It doesn’t matter. What we look for, when looking at histograms, is the spread. […]
But the truth is, if you wonder in what space to show an histogram, you most likely don’t know how to read it, so don’t bother at all, hide it and look at the picture instead.
I dispute the ‘any’ argument, since the screenshots I posted using your suggested spaces (PQ Rec2020, HGL Rec2020 and sRGB) are dramatically different.
Or maybe I don’t understand what you mean by ‘spread’.
And a personal note: I admit that you and I are not playing in the same league when it comes to colour science and image processing, but please understand that phrasing things like ‘if you wonder in what space to show an histogram, you most likely don’t know how to read it, so don’t bother at all’ sounds condescending and offensive to me. 