Re: Camera profiling
Re: Camera profiling
- Subject: Re: Camera profiling
- From: Roger Breton <email@hidden>
- Date: Fri, 03 May 2002 08:26:04 -0400
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At 11:55 AM -0400 5/2/02, steve sharp wrote:
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> My question then is: has anyone heard of this
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process actually working or the product itself?
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>
I'm very new in this area, but I see nobody has answered yet.
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>
My impression is that camera profiling works very well BUT you need
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to have a different profile for every situation where the variables
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change.
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In other words, if you have your camera in the studio and you are
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taking a picture of a bowl of fruit, you should take a picture of
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your target right next to the bowl of fruit at the same session. You
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then create a profile that is good for that session, not for all
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pictures you ever take with that camera. Or if you go out to the
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beach and take pictures of a model in a bathing suit, take a picture
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of the model holding the target as well, so you can create a profile
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for that session.
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I don't think there can be any other solution? -Steve
For now, I don't see any other solution. As a matter of fact, Kodak Acquire
software, which is bundled with the DCS Pro back works exactly that way. You
ask the subject to hold the Macbeth. You take a shot. It shows up in the
Preview. At which point, you select it with a rectangular marquee and the
software automatically creates an ICC profile from it, good for the entire
session. It sounds magic but I suspect there is more to this than just
slapping an ICC profile on top of an image for, as I recall, Kodak has this
secret sauce called ERIMM space proprietary profile that becomes the
starting point in the profile conversion. And I belive it has to be attached
to the spectral sensitivity of their CCD (which is phenomenal).
Beyond what the camera profile can do for you, there is always good old
Photoshop or Linocolor or ColorBlind Edit or Kodak ProfileEditor to take the
image one step further. And then you're back at color correction 101.
I did a few jobs with my Nikon 990X using ICC profiles I'd created with
ColorSynergy. I can't say the results were out-of-this-world but it was
decent. The profile did a good job at converting accurately a wide range of
colors but there were those that were systematically coming across
distorted, no matter what. I suspect this stems from some hidden non-linear
processing going on inside the camera that the profile just wasn't able to
model well.
You would think that these camera manufacturers would long have adopted an
ICC architecture? No, no such luck. Even more hairy, now the talk these days
is "Image Print Matching". A consumer-oriented solution? But wait, there's a
Photoshop Plug-in for it, did you wee that?
Regards,
Roger Breton
Laval, Canada
email@hidden
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