[argyllcms] Re: hplip printer driver and color management

  • From: "edmund ronald" <edmundronald@xxxxxxxxx>
  • To: argyllcms@xxxxxxxxxxxxx
  • Date: Thu, 28 Aug 2008 01:56:35 +0200

I don't know much about prepress color management, although I do know
a bit about photo color management.

For photo purposes, an RGB driver that doesn't apply sharpening is
usually color manageable by profiling. Here the printer guys have
already done the hard part of bringing 12 or so variables (ink
intensities) down to 3. The problem from the user side is usually
finding the tricks to get the right amount of ink onto the media type
being used, and thereby ensuring both a sufficient gamut and no
excessive overinking. Once a profile has been computed it will be
applied on the application side.

I am sure there are good reasons why people want to have color
management in the print channel. I assume the central motivation is
that this allows printing to a remote machine without storing profiles
locally. I'd say this is a less than perfect workflow, though, because
if you don't have local copies of your profiles you cannot do
softprooofing.

I think having a documented  place to put profiles, an utility to do
profile conversions -applying a printer profile to a Tiff file already
in a standard space like sRGB- and well documented inking options for
deliberately uncorrected workflows in the printer driver per se, would
allow photo printing to proceed very well with the current generation
of open source print drivers like CUPS and Gutenprint. No major
engineering required, folks, the heavy lifting has already been done.

Edmund

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