Re: Camera Profiling question
Re: Camera Profiling question
- Subject: Re: Camera Profiling question
- From: "dpascale" <email@hidden>
- Date: Fri, 12 Sep 2008 09:52:56 -0400
Rich,
The combination of the smooth or spikey illumination with the smooth or
irregular spectrum of colored objects will produce different colors. This is
called Color Constancy, and this is the basis for the Color Inconstancy
Index which determines the color shift for a given color when changing the
illuminant.
In practice you can can always "normalize" your images so that they all
match for a given color. Since this is often done for white (White-Balance),
you can obtain uniform white for all illuminations. However, nothing in this
process says that a pinkish color will look the same agains a greenish color
in all shots, since each color will/may shift differently with each light
source.
So there will always be a difference even if you do not want it (unless you
manually correct the colors).
Danny
----- Original Message -----
From: "Richard Apollo" <email@hidden>
To: <email@hidden>
Sent: Friday, September 12, 2008 6:55 AM
Subject: Camera Profiling question
Quick question about what someone would want from a camera profile. If you
photograph the same person under sodium or mercury vapor lights, tungsten
lighting, and then retail fluorescent lights the colors of their skin and
clothes will appear different. So, is it desirable to see the differences,
or do you want to retrieve a result from each condition that looks the
same?
Rich Apollo
Prepress Mgr
Oklahoma Offset, Inc.
email@hidden
918-732-8168
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