Re: digital camera profiling
Re: digital camera profiling
- Subject: Re: digital camera profiling
- From: Marco Ugolini <email@hidden>
- Date: Thu, 21 May 2009 18:45:52 -0700
- Thread-topic: digital camera profiling
In a message dated 5/20/09 10:33 AM, Fleisher, Ken wrote:
> Hi Marco. It's true that the goal is colorimetric matching, not spectral
> matching, but the problem I described is the "cause" of the color errors
> that are experienced when 1) calibrating to a ColorChecker SG and then
> photographing artwork who's pigments do not span the same spectral gamut as
> the target colors AND 2) when the camera's spectral sensitivities are not a
> linear transform of the color matching functions (which they are not for the
> cameras listed). One solution to that problem is to use a reference target
> that is composed of the same materials as the object that you are capturing.
Hi Ken.
That must be a high order of difficulty. One must create a specific target
for each group of pigments that compose a particular artwork to be
reproduced? If so, I wouldn't want to be the one who has to do that. Sounds
awfully tedious...
> Another solution is to use a camera with more than three broad-band
> channels, which can mean many spectral channels, or as few as 5-6 might be
> adequate for colorimetric imaging.
Yes, that sounds more practical. :-)
> Thank you for the link--I am familiar with Dr. Berns' research.
I was told that you worked with the good folks at MCSL. I didn't know that.
Marco
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