Re(2): The CIECAM challenge in ColorSync
Re(2): The CIECAM challenge in ColorSync
- Subject: Re(2): The CIECAM challenge in ColorSync
- From: Olaf Drümmer <email@hidden>
- Date: Tue, 24 Jan 2006 07:57:39 +0100
Hi,
PMJI - from my point of view the most important aspect of color
management in the graphic arts industry is predictability. We need to
know in advance what a color will look like, with as much accuracy as
possible. At the same time there are situations where a user may expect
the 'nicest' possible color (not necessarily expecting deterministic
predictability). So what's important when?
I see the following uses of color management in the print oriented part
of the graphic arts industry:
[1] separate an image (or some other object) to CMYK
This typically only happens once, and today mot often it happens under
more or less direct visual control of a user
[2] output (whether on screen or on a printer, or press)
This is actually the most important overall aspect because without we
wouldn't see any color
[3] simulate (soft proof, hard copy proof)
Widely used in the graphic arts industry (but not necessarily much
elsewhere) this uses a 'more powerful' output device to simulate what
color will look like on some other output device
[4] CMYK process conversions
adjust already separated data so it more or less looks the same on some
other output device
I'd say only for [1] one would want to maximize 'niceness' over precise
predictability. Any tool that helps a user arrive a more pleasant
separations may be useful.
For the [2] through [4] I find it difficult to accept anything else than
maximizing precise predictability.
And here goes my question:
Where would CIECAM or any other such advanced/smart CMM help me? Just
for [1]? Or also for [2] through [4]? Exactly what would it achieve that
can't be achieved today?
Olaf Druemmer
PS: I can easily see that smart CMMs may be very valuable outside the
graphic arts industry (i.e. especially when 'pleasantness' is more
important than 'precision'/'predicatibility'), but I also believe we
should say what we are referring to when.
email@hidden wrote Tue, 24 Jan 2006 11:16:39 +1100:
>Bret Hesler wrote:
>
>> My point is that I have seen descriptions of smart CMMs in development, and
>> WCS seems to be right along those lines. How far are we from seeing Smart
>> CMMs in ColorSync or ICC architecture?
>
>Hard to say. There doesn't seem to have been much visible activity within
>the ICC solar system in discussing or promoting "Smart" ICC compatible CMMs.
>Most of the effort recently seems to have been to get ICCV4 "out
there", since
>it should offer roughly comparable behaviour to a "Smart" CMM, and there is
>lots to do fully applying ICCV4 to workflows etc. Some commercial
>implementations
>have made some bits of a "Smart CMM" available (ie. Adobe BPC, various
>tools to
>retain black ink intent though a CMYK -> CMYK link), but off hand I'm
not sure
>if any fully "Smart" ICC based CMMs exist, except my own of course (Argyll),
>and it's not really set up to be a CMM (although it could be turned to
>that purpose).
>
>Graeme Gill.
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