[argyllcms] Re: Argyll vs. manufacturer's profile

  • From: Graeme Gill <graeme@xxxxxxxxxxxxx>
  • To: argyllcms@xxxxxxxxxxxxx
  • Date: Thu, 21 Oct 2010 13:50:54 +1100

Uli Oertel wrote:
So it seems to be that Epson applied some adjustments to improve the
reproduction of blues accordingly to a common "taste"?

A lot of the research papers on such automatic "memory color" adjustments seem
to be from Japanese companies. (I don't much like that approach myself,
as I tend to see it as distortion rather than reproduction.)

Blues tend to be a problem in printing, simply because the printed
gamut is not very large in that area, whereas RGB gamuts are typical
large in blue, and as a result the trade-offs are often severe,
particularly between saturation, lightness and color purity.

If you compare Argyll's perceptual vs. saturation intents, you will
see that the saturation intent trades poorer color purity and lightness
for greater saturation.

As Edmund mentioned, it makes a difference to have "problem" example
images and profiles that I can test the gamut mapping against.
As well as the printer profiles, I would need an example image
in a specified source space (AdobeRGB ?) to be able to start
to see what you are talking about.

It can make some difference to do image specific gamut mapping too.

Graeme Gill.

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