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Re: ICC Profile location for PS RAW
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Re: ICC Profile location for PS RAW


  • Subject: Re: ICC Profile location for PS RAW
  • From: Graeme Gill <email@hidden>
  • Date: Thu, 13 Nov 2003 14:09:04 +1100

Bertho Boman wrote:
> I agree with your very well written explanation but I do not understand your
> conclusion. All those possible problems you are explaining, should they not
> also apply to the two profiles in ACR?

Of course, but two profiles provide more information than one,
and if there is a continuum between the two points (say, connected
by the color temperature), then a whole dimension has been added
to the characterization.

> Why two profiles in ACR at different color temperatures?
>
> If we have one measured profile at one color temperature, why can not the other
> one be mathematically predicted since the spectrum distribution of the light
> source can be calculated at a different color temperature.

Because the spectral reflectance of the test chart/scene is unknown, and
the spectral sensitivity of the camera is unknown.

Graeme Gill.
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References: 
 >Re: ICC Profile location for PS RAW (From: Derrick Brown <email@hidden>)
 >Re: ICC Profile location for PS RAW (From: Graeme Gill <email@hidden>)
 >Re: ICC Profile location for PS RAW (From: "Bertho Boman" <email@hidden>)

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