[Openicc] ALL YOU NEED IS A PROFILE, THE MYTH. (WAS CC Profiles In X Specification and dispwin)

[edmund ronald]

Exactly. And the guys who write the halftoning algorithms, and the
guys who package things need to have non-regression image test suites,
and instrumentation preferably of the automatic sort to enforce the
stability checks every time they change someting in the software and
prepare to release the update. My thought is that at some point a
trick will need to be found to "cast in stone" the rendering to paper
from existing versions of software, because users will not understand
it if they need to redo all their ink curves and profiles every time
they update their Linux boxen.

The solution I recommend to the stability problem is not a repository,
it is a virtual appliance, a virtual RIP server distribution as a
Vmware or Xen or Qemu virtual machine, which can have a "version
number" and can be certified as tested. Users can then just download
this virtual appliance, run it in their environment where it will do
all the ink and paper stuff, and feed it color managed files and maybe
some additional custom profiles or special curves as data from their
-separate- desktop environment.

Edmund

On Jan 17, 2008 1:13 AM, Gerhard Fuernkranz <nospam456 at gmx.de> wrote:
...
>
> I don't want to go deeper into details now. However, the important issue
> is IMHO that driver models like above should be well-defined,
> well-documented and fixed, i.e. the behaviour should not change
> incompatibly from version to version. Also the halftoning algorithm
> should not change, since this would have an effect on the color
> reproduction (new halftoning algorithms could of course be introduced
> additionally in new versions, but the old ones should be retained too).
>
> Stable driver models would IMHO be a prerequisite in order that a
> repository of calibration curves and ICC profiles for various
> printer/ink/paper combinations could be established by the community.
> The driver would just implement the bare model(s), and the
> parametrization of the model(s) would come from the repository.
> Additionally there should be tools, which aid in the establisment of the
> calibration curves for the different driver models (CMYK, CcMmYKk,
> multicolor,...) from measurements. Tools to create ICC profiles are
> already available, e.g. Argyll and commercial ones.
>
> Regards,
> Gerhard
>
>