Re: Profiling Digital Cameras
Re: Profiling Digital Cameras
- Subject: Re: Profiling Digital Cameras
- From: drdot <email@hidden>
- Date: Fri, 8 Mar 2002 10:52:54 -0800
>
Eric G Bullock wrote
>
Would someone be so good as to explain to me why profiling a digital camera
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is so difficult? It certainly isn't a cut and dry procedure and seems to
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require a bit more finesse. I'd like to evolve past the built-in profiles
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that shipped with our LightPhase camera backs. As of now I find I get
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better color with Color Management disabled. I'd like to think that a
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custom camera profile would solve many of these problems but our limited
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experiments were not very promising. Any insight or helpful hints would be
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appreciated.
The problems of profiling a digital camera are in the light source.
Scanners have light sources built in and are constant, so a profiling for a
scanner is reasonably consistent. Profiling a camera will demand a profile
that is produced for each lighting situation. This can be done by carrying
a Macbeth color target around and organizing groups of images with it's
shot of a control target shot with a that particular lighting condition.
This image of the target would be used to profile that group of shots with
the lighting used to produce them. These profiles can be attached to their
corresponding image. So yes profiling can be done. There are situations
where 3d objects will be difficult. For example Sodium light contaminating
a Mercury vapor lit room. These are close to impossible conditions but I
thought it would get the point across.
Sam Landry
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