Re: View booth issues
Re: View booth issues
- Subject: Re: View booth issues
- From: Mike Eddington <email@hidden>
- Date: Fri, 19 Dec 2008 11:37:10 -0500
Hey there Roger,
Is calibrating to a viewing booth chromaticity all that much better
than
calibrating, say, to D50 chromaticities?
This could depend on how close your viewing booth is to the D50
chromaticities. The further away the viewing booth chromaticity is,
the better off you'd potentially be using custom chromaticities for
softproofing. ISO 3664 defines the targets for viewing conditions, but
there are tolerances. Are those tolerances tight enough to ensure that
a print viewed under different venders/models of ISO 3664 lighting
will look the same? I haven't studied this in depth, but I'm betting
(and experience tells me) no.
Is it "measurably" better? Anyone
sitting in the driver seat can see the improvement?
Perhaps more visually than measurably. My light booth is within
tolerance of ISO 3664 (to the best of my ability to measure it with an
i1 Pro), but I get a better visual match deviating away from D50 and
toward custom chromaticities when creating my monitor profiles.
I seem to remember that, at the time the ISO-12646 standard was
drafted and
voted, a few years ago, by Tony Johnson et al, viewing booths were
around.
It can be argued that the authors of the standard could have chosen
the
route of calibrating monitors to some viewing booth chromaticities,
yet,
they didn't.
Should they have choose a particular viewing booth chromaticity, or
let the user define that based on the measured characteristics of
their own viewing booth (assuming they have the ability to do so)?
From a standards perspective, I think it was better to define the
chromaticity target fully... without preference to a particular
viewing booth, but the target of what the viewing booth itself is
shooting for (D50). Also note that not all softproofing is done with a
viewing booth/hardcopy comparison. Lining up a number of monitors all
calibrated to custom chromaticities would likely show significant
differences between them, though perhaps they all match the print
optimally under the light sources whose chromaticites were used in
their calibration.
An argument that could become moot when you think of
JUST-Normlicht LED viewing booth, I realize.
Isn't this sort of the same thing? One of the benefits of the Just LED
is that it can match the chromaticities of your monitor. So either
calibrating your monitor toward your light source's chromaticites, or
calibrating your light source (if you have this cool new Just product)
to your monitor's chromaticites could have an accuracy advantage over
assuming one or the other or both unequivically match D50.
my 2 cents of rambling,
Mike
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