[argyllcms] Re: A question about viewing gamma (dispcal)
- From: adam k <aak1946@xxxxxxxxx>
- To: "argyllcms@xxxxxxxxxxxxx" <argyllcms@xxxxxxxxxxxxx>
- Date: Fri, 29 Oct 2010 20:01:49 -0400
Are looking for holly Grail?
Sent from iPhone
On Oct 29, 2010, at 7:58 PM, Gerhard Fuernkranz <nospam456@xxxxxx> wrote:
> Am 30.10.2010 00:18, schrieb Anders Torger:
>
>> Another way to put it - if I know I need a viewing gamma of ~1.2 to
>> compensate for a unusually dark viewing conditions, what do I do?
>
> Colorimetric rendering intent is always supposed to do a
> _colorimetrically correct_ reproduction (as far as possible, given the
> gamut of the destination device), i.e. it is not supposed to emulate the
> appearance under different viewing conditions or to do any artistic
> color transformations. So when strictly conforming to the ICC specs you
> can do this only with perceptual rendering intent (granted that the
> perceptual intent table of your profile does the "right thing", i.e.
> what you desire).
>
> When you create a device profile with colprof (or a device link with
> collink) you can tell colprof/collink to incorporate an CIECAM02 color
> appearance mapping between source and destination viewing conditions
> into the perceptual and/or saturation intent tables (not just a "viewing
> gamma" adjustment, but even a more sophisticated CIECAM02 transformation).
>
> [ Btw, matrix/TRC profiles are colorimetric only by definition. ]
>
> Regards,
> Gerhard
>
>
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