Re: Portable Spectrophotometers
Re: Portable Spectrophotometers
- Subject: Re: Portable Spectrophotometers
- From: Henrik Holmegaard <email@hidden>
- Date: Tue, 12 Feb 2002 13:54:48 +0100
Tom Beckenham <email@hidden> wrote:
I was actually commenting on what Henrik said about averaging across the
patch. The Spectrolino doesn't move across the patch, and would only sample
one point/area per patch within a radius, right? Does the i1 take more
samples per patch?
Sorry, I'm only following the List with half an eye these days.
Ever since ProfileMaker 3.0 there has been a step and repeat function
for the SpectroScan. This lets you shift the aperture and resample
the patch. The aperture of the Spectrolino is 4.5 mm which as far as
I recall is the same as the Eye-One.
The Eye-One and the iCColor both automatically sample multiple times
across the patch and average their samplings, too. The Spectrolino
when mounted in the SpectroScan samples multiple times per patch with
a step and repeat setting in ProfileMaker.
The iCColor, the Spectrolino/SpectroScan and the Eye-One can all be
used with the MeasureTool in freeware mode to measure charts which
can then be e-mailed to somebody else for profile creation.
The iCColor is expandable and one of the concepts in the chute is
TCP/IP support with an add-on Ethernet card cf the brochure. If /
when eventually realized you might capture measurement sets remotely
and analyze them centrally e.g. for profile tweaking and tuning. You
might also run colorimetric process control on the same remote basis
regularly. IOW hand the unit to the press room customer, leave it on
site where all the press operator has to do is run the press to
density specs and feed the charts for automatic measurement (with
automatic white calibration) and automatic transmission of the data,
but not spend time with the MeasureTool let alone figuring out
whether to tweak Lab -> CMYK BtoA1 or CMYK -> Lab AtoB0 or whatever.
Press room runs presses, press room submits characterization data for
profiling and control data for checking, in-house color manager
manages color / outsourced consultant consults. IOW an extension of
the original ColorLab workflow through the profile editing
functionality of PM4.
The FOGRA / ISO concept of colorimetric process control is sensible
and IMO should be pushed whereever and whenever possible. If profile
tuning is what users want, then better have this centralized than
distributed in the color workflow, I'd think.
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