Re: 5-6000 K: Colorspace Question
Re: 5-6000 K: Colorspace Question
- Subject: Re: 5-6000 K: Colorspace Question
- From: "Richard Frederickson [Contr]" <email@hidden>
- Date: Thu, 22 Jun 2006 08:29:42 -0400
Title: Re: 5-6000 K: Colorspace
Question
Confirming the monitor/view box match with white paper in the
booth is what I've been taught in the past; and using 6000°K for my
monitors is what I've found provides the best match to the viewer (GTI
soft view and using an eye one for monitor calibration).
As a follow-on to this discussion...
I've read that Adobe RGB is the most appropriate colorspace for
digital imaging for its wide gamma. However, when I pulled-up my
monitor profile in ColorThink and compared it to the various color
spaces, the best "white" seems to line up with
ColorMatch--not Adobe RGB. The white in Adobe RGB seems to be offset
and I'm wondering wheter or not this mismatch is worth being concerned
about if I want to use AdobeRGB as my standard working space (since it
does not clip as many colors as ColorMatch).
Your thoughts on this are appreciated,
Richard
Richard Frederickson
[Contractor]
Senior Technical
Specialist
Scientific Publications,
Graphics & Media (SPGM)
SAIC-Frederick,
Inc.
National Cancer Institute at
Frederick
Frederick, MD
21702-1201
(301) 846-1546
Visit us at
http://web.ncifcrf.gov/spgm
Hmmmmmm . . . - sounds like theology to
me. What if I don't put any proof in
the lightbox, but simply look at the neutral gray walls? It still
takes
about 6000K from the monitor to get gray to match gray.
Mark Rice
-----Original Message-----
From: Simon Prais
[mailto:email@hidden]
Sent: Wednesday, May 31, 2006 5:22
PM
To: email@hidden;
email@hidden
Subject: Re: Colorsync-users Digest, Vol 3, Issue 196
Alexey and Mark
I note your comments about matching monitor white points to viewing
booths.
We similarly find that setting a monitor at around 6000°k gives a
good match
to the white of an image in a 5000°k viewing booth.
The explanation I give is that in the viewing booth you are seeing
the
5000°k light reflected off the media you are viewing - i.e the white
of the
paper your proof is printed on. This changes the temperature of the
light
you are seeing - normally in the direction of 6000°k. Whereas the
white of
the monitor is not reflected light, but transmissive light, so you set
it to
match the temperature of the viewing booth light after it is reflected
off
the white paper of your proofs.
Simon
www.colourconfidence.com
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______________________________________________________
> From: "Gribunin"
<email@hidden>
> Subject: RE: LaCie
calibration
> To:
<email@hidden>
> Message-ID:
<006701c6847f$8d836770$email@hidden>
> Content-Type: text/plain;
charset="us-ascii"
>
> Hello Mark!
>
>>> I find I have to get my
monitor set to about "5800K"
>>> (by the EyeOne) to match a 5000K light booth.
>
> I also have the same experience with both Spectrolino and EyeOne
Pro.
> In both cases I need to adjust monitor white point somewhere
around
> 5300-5500K to match 5000K viewing booth. I think this happens due
to
> non-linear spectral emission of the monitor white point. This
also can
> be the reason of different color temperature reading between
> colorimeters and specrohpotometers.
>
> Best regards,
> Alexey Gribunin, UNIT Color Technologies, Moscow, Russia.
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