[argyllcms] Re: tiffgamut feature request
- From: "edmund ronald" <edmundronald@xxxxxxxxx>
- To: argyllcms@xxxxxxxxxxxxx
- Date: Mon, 1 Sep 2008 12:14:08 +0200
Hi Klaus -
The choice of non-adaptative gamut mappings seems to be a design
decision made in the early days, and which has been forgotten.
The advantage of non-adaptive gamut mappings is that relationships
between colors in separate images are preserved.
The disadvantage is a non-optimal compression.
As a result the present system is mostly ok for print like magazines
where many images need to be remapped automatically.
The present method is lousy for fine art. It is definitely time that
this issue be reopened.
While Klaus's idea (union of gamuts) is a definite improvement for
groups of images, this still does not solve the problem of adapting
the gamut for individual fine art images, since in fine art one will
frequently decide to "burn out" (saturate) some colors which are not
deemed significant in order to gain nuances for the other significant
colors. This is done at soft-proof time, and is similar to deciding
which parts of an image will be dropped into black or burnt to white.
Someone interested in a research topic might find it profitable to
look at manipulations of the saturation component.
Edmund
On Sun, Aug 31, 2008 at 6:44 PM, Klaus Karcher <lists@xxxxxxxxxxxxxxxxx> wrote:
> There are several workarounds to circumvent this pitfall, but the most
> convenient would be to use tiffgamut to calculate the set union of all
> gamuts, e.g. with something like
> "tiffgamut -s sequence/*.tif sequence.gam".
>
> What do you think about it?
>
> Klaus
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