[argyllcms] Re: Profile generation with perceptual intent with compensation for paper white
- From: Henrik Olsen <henrikolsen@xxxxxxxxx>
- To: argyllcms@xxxxxxxxxxxxx
- Date: Thu, 21 Sep 2017 17:18:38 +0200
On 21 Sep 2017, at 16.38, Graeme Gill <graeme@xxxxxxxxxxxxx> wrote:
There's no such thing as absolute a* b* = 0, since L*a*b* space is
always relative to some white point. In ICC PCS space that is sometimes
defined to be D50 though, and in that context can be used as a pseudo
absolute measure.
I see. I’m refering to my standard i1 readings with default white point. Here
I’d like a greyscale to print neutrally, as in paper readings stay at a* and b*
0. But contrast can change, that’s ok with me, and what I manually try and
adapt for as experiments in Photoshop, to keep shadow and highlight detail when
later converting to absolute intent for print - to keep my printed colors as
true to my editing as possible (saturated colors can clip, ok with that).
That process/result/wish must be possible without manual editing of images, I
believe. Possibly through some profile generation techniques I don’t know of
yet (alternative intents, abstract profiles on top of available intents, grey
scale adaptation factor for perceptual or...).
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