[argyllcms] Re: Monitor profile as conversion source

  • From: Graeme Gill <graeme@xxxxxxxxxxxxx>
  • To: argyllcms@xxxxxxxxxxxxx
  • Date: Tue, 10 Apr 2012 10:19:04 +1000

Mauro Boscarol wrote:
If the monitor profile is always used as destination, then it is important to 
test the
quality of the transformation from RGB to PCS (XYZ or Lab).

There is a command in Argyll to check a monitor profile in the PCS to RGB part?

Hi, the primary profile model is derived from the measurements, and is
in the natural device direction: Device -> PCS. Everything else is
derived from that primary model.

You can check the primary model against a data set using profcheck. A
real check will be against a set of measurements that is independent of
the ones used to create the profile.

You can check the inverse model (PCS -> Device) against the forward model
using invprofcheck, but notice that this is a inexact check due to the
difficulties to determining the edge of the gamut (i.e. at the edge of
the gamut, at what point is the deviation of the forward and reverse
models turn from an accuracy error into being beyond the device
gamut ?)

Graeme Gill.

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