Eye-One Diagnostics
Eye-One Diagnostics
- Subject: Eye-One Diagnostics
- From: Henrik Holmegaard <email@hidden>
- Date: Wed, 31 Dec 2003 11:31:37 +0100
Richard Kenward <email@hidden> wrote:
>Interesting observation which actually I have not read about before!
>Perhaps someone from X-rite would like to comment? My position on
this
>is that the basis of any measuring device is that it should be
>consistent otherwise it's not measuring!
Lest the comment be conceived as a depreciation of a company, you
might want to consider the following:
(1) An incomplete PDF project released in 2000 as the icc abc series,
written with Heidelberg and X-Rite, explained why there is a
discrepancy of 2D in L* as between the Digital Swatchbook and the DTP
41, otherwise billed as functionally part of the triple instrument set
for reflective scan spectrophotometry (DTP 41), reflective spot
spectrophometry (Digital Swatchbook) and emissive spot colorimetry
(Monitor Optimizer).
The discrepancy between the Digital Swatchbook and the DTP 41 was
unfortunate for proof verification because the paper white simulation
is of course controlled with the spot measuring instrument which
therefore will be inaccurate by a fairly large amount. Both in the icc
abc and on the List the remedies were posted many times.
(2) You may want to search the archives for contributions on the
Digital Swatchbook with respect to chroma accuracy. If memory serves
tests were contributed by Wolf Faust, among others.
>Also any instrument's diagnostic facilities should be able to be relied
>on, otherwise it renders the instrument it is designed to verify as
>working within specification or calibrated as open to doubt.
You are right, though I have a feeling this is more about rambling
telephone support than about technical implementation. The instrument
wasn't shipped in for service check, judging by the thread.
When the iCColor was being tested, we tried to switch the shipping USB
lead with a much longer USB lead for the convenience of sitting the
instrument freely on the desk, just to see what might happen.
The instrument didn't much like the longer lead, but I don't recall
that a diagnostics test would have caught this change in the operating
environment.
Just an example, and glad I'm not in tech support -:).
Thanks,
Henrik
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