[argyllcms] Re: FW: Workspace mapping
- From: Florian Höch <lists+argyllcms@xxxxxxxxx>
- To: argyllcms@xxxxxxxxxxxxx
- Date: Sun, 05 Oct 2014 13:27:55 +0200
As I understand it, the ICCv4 "preference" sRGB profile is primarily
meant to be used as source profile when mapping directly into an
(preferably ICCv4, LUT-based) output/printer profile.
When converting to a (matrix-based) working space, you'll loose the
ability to get a true perceptual mapping.
Am 05.10.2014 um 13:09 schrieb robert@xxxxxxxxxxxxxxxxxx:
> The ICC has released a v4 sRGB profile (Beta release) that provides both
> Relative and Perceptual mapping to other workspaces (although I see from
> Graham's documentation that he says that: "The chief drawback (of v4), is
> that only one (non colorimetric) intent can really be supported, that of
> saturation").
>
> I've tried out the ICC sRGB v4 profile and although I can't say that the
> perceptual mapping works well in the images I've tried (the usual v2 RC
> mapping to sRGB seems to give better results with LESS clipping!), it would
> seem to be a step in the right direction.
>
> If I do a further conversion, from the v4 sRGB to v2 sRGB the image
> improves, but it's still worse than the direct v2 mapped image.
>
> Could this be due to v2/v4 mismatching? My monitor profile for example, is a
> v2.2 profile. I'm comparing the images in Photoshop.
>
> Any advice, explanations, insights?
--
Florian Höch
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