Re: A New Topic!
Re: A New Topic!
- Subject: Re: A New Topic!
- From: Martin Orpen <email@hidden>
- Date: Wed, 6 Feb 2008 21:50:05 +0000
On 6 Feb 2008, at 20:22, Mark Rice wrote:
My experience
came from the photographic digital imaging field, where extreme
precision is
a must.
You're having a laugh aren't you? Or are you working in a different
"photographic digital imaging field" to the labs that the rest of us
have to use?
All photographic photo printers and film recorders use "iterative
linearization" to obtain precisely controlled grayscales that match
target
densities very precisely. I have been begging RIP makers Onyx and
SAI to
produce such a RIP, but they don't really see the need for it. My
problem is
that if one achieves a linearization that is close, but not dead on,
one can
re-linearize, but it is just as likely to make the linearization
worse as
better. And, of course, if the linearization changes, the ICC profiles
become nearly useless.
Pre-press proofing RIPS like the EFI have used iterative calibration
routines to build Lab correction curves for years.
They might be interested to see you claiming copyright on the
process :-)
--
Martin Orpen
Idea Digital Imaging Ltd
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