Re: 2 questions about monitors
Re: 2 questions about monitors
- Subject: Re: 2 questions about monitors
- From: Alex Villegas <email@hidden>
- Date: Wed, 21 Sep 2005 14:46:51 -0300
Thanks Andrew - the explanation is perfect!
Alex Villegas
Coordenador Técnico Pré-Produção
Metromedia Technologies
5511 4689.7759 / 5511 4689.7760
email@hidden
On Sep 21, 2005, at 2:33 PM, Andrew Rodney wrote:
On 9/21/05 11:14 AM, "Alex Villegas" wrote:
That's it... I know that it works, but I'd really like to understand
the mechanics of it. If someone asks me the reason why I use 6500K on
the monitor and 5000K lighting, I simply can't explain.
First of all, it's a tad dangerous to use Kelvin to define the color
you're
hoping to nail since many differing colors of white can correlate to
the
same value. If all light sources were true blackbodies a particular
color
temperature would produce the same color of light but that's not the
case.
Let's stick with standard illuminants and assume that when we actually
tell
the calibration software what we want, it's using these target values.
Logic would dictate that since we are going to view our prints under
controlled lighting of D50, we should also set our display’s white
point to
D50. If our display luminance level was as bright as our viewing
environment
and our paper color was perfectly neutral would likely work just fine.
It is common for users who calibrated their displays to D50,
especially a
CRT to find that their image previews appear dim and a bit too yellow.
On
many displays it is harder to achieve high luminance levels at D50. The
white of most photographic paper is pretty blue when viewed under a D50
illuminant.
The more common photo papers used these days provide a better screen to
print match when you calibrate to D65. As mentioned in a previous
post, we
hope to achieve a match between the white of the paper and the white
of the
display. I usually suggest that if you're working with these kinds of
papers
you start at a target value of D65 for your display calibration and
see if
you get a satisfactory match. With some of the warmer papers found in
commercial printing, D50 can often work better as a target value.
Andrew Rodney
http://www.digitaldog.net/
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