Re: Color accuracy in copying paintings
Re: Color accuracy in copying paintings
- Subject: Re: Color accuracy in copying paintings
- From: "Ernst Dinkla" <email@hidden>
- Date: Sat, 20 Jul 2002 15:11:52 +0200
----- Original Message -----
From: "Tony Riley" <email@hidden>
To: <email@hidden>
Sent: Saturday, July 20, 2002 10:27 AM
Subject: Color accuracy in copying paintings
>
Joseph - (Re: colorsync-users digest, Vol 3 #311 - Scan Back
Repro Copy )
>
>
With respect, and my comments are directed to the list rather
than your post
>
specifically, I'm just quoting you because you identify the
points very
>
well!
>
>
>BetterLight (BL) and PhaseOne (P1) make good scan back cameras
for Repro
>
Copy work.
>
Yes, but 'copy' meaning 'copying' cmy dyes in photographs, not
pigments in
>
paintings. Its not the same.
>
>
>P1 believes that they a have color technology that replicates
the human eye
>
(theoretical).
>
If it did it wouldn't reproduce cmy dyes so well. We 'see' rgb
rather than
>
cmy.
>
>
>The short comings of Art Repro Copy work will come from your
output
>
device(s).
>
I suspect not mainly. I think the shortcomings in reproducing
rgb pigments
>
in paintings (i.e. not cmy dyes in photographs) as far as color
accuracy
>
goes, comes from the 'optimisation' of the input device (line
scan ccd)
>
towards cmy.
>
>
As I said in my previous post, this is why an area array camera
(not based
>
on line scanner technology, and optimised for rgb response
instead) will
>
give more accurate color reproduction (of painting pigment).
I'm not
>
disagreeing that line scan may be vastly superior in terms of
bit depth,
>
resolution and so on, I'm referring purely to accurate
reproduction of color
>
in paintings.
But why do you think that is the case ? The manufacturers of scan
backs may have had to rely on scanner hardware components that
were more biased to CMY photo dye reproduction then. This scan
back industry should be mature now and know that the scan backs
are used for still life scenes, art reproduction and even
landscapes without moving objects. Not all pigment based but
certainly not photo CMY dye based. The users at least will
profile those backs with pigment targets I hope and not with the
usual photo dye targets. If the last is done correct you think
that scan backs are then still too much based on CMY photo dye
reproduction ?
Ernst
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