[Openicc] printer, driver, CUPS, PPD, printing GUI, ICC-profiles, colord, Oyranos, taxi....

[edmund ronald]

Kai-Uwe:

I find myself mostly agreeing with Michael Sweet here.
Override controls at printing are useful in certain cases (eg. printing
with a paper similar but not identical to a known type) but in practice
they cause a lot of problems and should be secured with a big red button
which says "HURT ME!".

Edmund

On Tue, Jan 24, 2012 at 8:20 PM, Michael Sweet <msweet at apple.com> wrote:

> On Jan 24, 2012, at 9:18 AM, Kai-Uwe Behrmann wrote:
> > How does the CMS select the right calibration gamma?
>
> The CMS doesn't.  The DEVICE PROFILE contains any calibration data needed
> to go from the PCS to the device color space.  The document contains the
> profile (or a reference) so that the CMS can convert document color to the
> PCS, and from there to device color using the device profile.
>
> Gamma (as a user setting) is a crutch that CUPS provided (along with
> "brightness") to deal with the limitations of color management before ICC.
>  It isn't supported on the Mac and has been deprecated in CUPS for a while
> now - I think only the CUPS imagetoxxx filters support it these days...
>
> There are far better ways to manipulate the apparent brightness, shadow
> detail, etc. of a photo in order to produce the best artistic rendition of
> that photo on paper.  Gamma, by itself, is a poor substitute and only
> encourages bad color management to proliferate.
>
> __________________________________________________
> Michael Sweet, Senior Printing System Engineer, PWG Chair
>
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