[argyllcms] Re: Quality problems on limited gamut media
- From: "Mihai Zahorski" <zmihai@xxxxxxxxx>
- To: argyllcms@xxxxxxxxxxxxx
- Date: Sat, 5 Apr 2008 14:22:17 +0300
Thank you very much for the quick reply!
I have tested again using Argyll V0.7 beta 8 and the results are very
promising using the perceptual intent. The colors look very well and there
is also plenty of shades detail. Unfortunatelly the washed out effect is
still there when using the colorimetric intent. Since the paper is thin, I
use a small total ink limit around 200. I will try to investigate more this
problem.
On Fri, Apr 4, 2008 at 6:29 PM, Graeme Gill <graeme@xxxxxxxxxxxxx> wrote:
> Mihai Zahorski wrote:
>
> > I get very promissing results using argyll with glossy paper, but the
> > profiles made for uncoated thin paper yeld images with washed out
> > colors. So
> > everything looks less saturated and areas with similar colors loose a
> > lot of
> > detail. I'm very interested in using the perceptual intent, for which
> > I've
> > set sRGB as source gamut, but the results are still less satisfying than
> > using the default profiles for the printer. Is there any issue with such
> > media in Argyll? I'm using version 0.6.
> >
>
> I'd suggest at least trying out V0.7 Beta8, and seeing if that
> is any different, as some of the black level and neutral
> axis mapping has changed since V0.6.
>
> Without further information (ie. the profile, an example of
> the type of imagery), it's hard to do more than speculate though.
>
> It most likely comes down to intent. Perceptual aims to
> include the whole source gamut, and do so in a way
> that preserves the distinction between all the source
> colors. If you have a limited gamut device and an image
> that occupies a smaller portion of the source gamut,
> then it is likely to be squeezed into a disappointing result.
>
> There are a number of ways this could be addressed. One would
> be to make a gamut for the source image, and taylor the
> gamut mapping for that rather than the color space the image
> is in (profile -g option, icclink -G option].
>
> Another would be to use a gamut mapping that deliberately enhances
> saturation, such as saturation (intent ms), or enhanced saturation
> (intent s).
>
> Finally you could try using an intent that doesn't try and
> preserve the whole of the source gamut, such as colorimetric
> (intent r, or la).
>
> I hope this is some help.
>
> Graeme Gill.
>
>
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