Re: Building a SWOP profile
Re: Building a SWOP profile
- Subject: Re: Building a SWOP profile
- From: Henrik Holmegaard <email@hidden>
- Date: Mon, 3 Feb 2003 20:21:27 +0100
Graeme Gill <email@hidden> wrote :
>The disadvantage of using this data is that it can't be verified
against
>any particular print. If you see a difference, is it due to errors
>in your reproduction, or due to differences between your particular
>reference print and the average ?
Reference FOGRA ISO prints have been available for some years. SWOP is
another matter.
>Another disadvantage is that you can't measure target and output
>device using the same instrument, thereby eliminating
>model and instance difference errors.
Reference prints are as a rule measured with the Spectroscan. For a
newly certified or recertified Spectroscan the tolerance is negligible
(compared to the tolerances across a sheet of paper, for instance).
Instrument-based tolerances are a reality, and one has to know the make
and model of instrument used for reference and sample, but that doesn't
disqualify the use of reference prints. The difference between a
chronometer and a less precise timepiece doesn't disqualify everyday
navigation, either.
Just my ten cents.
Henrik
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