Re: Iterative linerization
Re: Iterative linerization
- Subject: Re: Iterative linerization
- From: Kevin Muldoon <email@hidden>
- Date: Thu, 7 Feb 2008 14:18:37 -0500
Lets say a media profiled 2 months ago in fairly dry conditions
happens to be relatively damp today due to a few rainy days (media
wasn't protected, lets say). We may be tempted to use the 're-
linerize' features of the RIP but often we find this makes the
problem worse rather than better. I believe what is occurring is the
fact that densities achieved in dry states simply can't be equaled in
damp conditions and any effort to get back to original densities and
curves are doomed to fail.
With inkjet printing, I believe this would be true in iterative
linerization techniques as well. I suspect the reason they worked at
all was the devices we used iterative linerization techniques on
could always get back to original curves, densities no matter what.
On Feb 7, 2008, at 1:25 PM, email@hidden
wrote:
I am a fan of color management, but I have one major problem in
dealing with
in the context of most inkjet printers: most inkjet RIPS are not
consistent
or repeatable in calibration procedure. That flaw means that color
management is larger doomed on these RIPS for exacting users. My
experience
came from the photographic digital imaging field, where extreme
precision is
a must. 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.
--
Kevin Muldoon, Owner
TrueBlueDot - Fine Art Printing
New Haven, CT 06511
email@hidden
www.truebluedot.com
"Our pigment meets your imagination"
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