Re: Scanner Color Space
Re: Scanner Color Space
- Subject: Re: Scanner Color Space
- From: email@hidden
- Date: Mon, 11 Nov 2002 20:35:56 EST
In a message dated 11/11/02 1:14:17 PM, email@hidden writes:
>
How is this different from a digital camera?
>
A scanner has a controlled light source, offering a fairly fixed state., A
digital camera has a lot more stuff going on, with in-camera manipulation of
the data for any number of factors. In that sense a camera has even less of a
fixed gamut than a scanner, or to look at the other side, a more variable
response range.
>
E.G., film is said to have a
>
color gamut, but it is also said to have a response range (e.g., negatives
>
vs chromes).
>
It has a response range, from which one can determine a reasonable gamut to
to use with it...
>
How do you separate these 2 terms in the context of RGB
>
dvices, dcams & scanners???
>
I've done it for all three now, so you should be getting a sense of how I do
it by now... its kind of a cause/effect thing. A gamut is a relative effect
of a color response, or range of color responses.
>
I believe I catch your crux, but if a scanner
>
is profiled with respect to its range and ability to capture color, doesn't
>
the range become a gamut in the context of device profiles??
>
It has to, to be useful in this manner. But there is no absolute line in the
sand that is the gamut limit of the device, only a selected practical limit
based on the response of the device. With a printer, its a bit more concrete.
With a given set of settings, a given ink, and a given media, a printer will
have a pretty clear gamut limit.
C. David Tobie
Design Cooperative
email@hidden
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