[Openicc] colord Printing Plans GhostScript

[Gerhard Fuernkranz]

Am 01.03.2011 07:09, schrieb Michael Vrhel:
> As far as "turning off" transformations for DeviceRGB or DeviceCMYK,
> that will occur in cases where the source and destination profiles are
> the same.

Michael, I'm wondering, how do you determine whether two profiles are
"the same"? Seems not to be easy. Do you sample the whole color space
gamut of both profiles and check for colorimetric differences? Is for
instance an internal ICC profile created from a CSA describing SWOP
color space considered "the same" as USWebCoatedSWOP.icc, if they happen
to match colorimetrically? Or another example, are two RGB profiles "the
same", if the the have the same primaries and also TRC curves with the
same shape, but with a different representation of the TRC in the
profile (e.g. gamma value, versus 1D LUT representing the same curve)?

Regards,
Gerhard