Digital BW, The Print

Hi Steve,

Soft proofing and ICC printing are pretty different things.  What we've don=
e
lately for soft proofing is just simulating the "look" of a print in RGB th=
at
you can see on a calibrated monitor.  It has no knowledge, notion or
whatever of how the ink got onto the paper.  In a sense that's the beauty
of it -- you can simulate the look of any method of printing.

ICC printing is a whole different thing.  An ICC profile can't do an arbitr=
ary
mapping to N inks because the output has to feed into an RGB Epson driver.
You can certainly accomplish a lot going through an RGB representation --
that's what the Roark workflows do and the new ICC stuff from Cone does.
But the more you modify the inks from what the Epson driver thinks is
in there, the more work it is to "fool" (i.e. design RGB curves) the driver=
 into doing
what you want.  The QTR approach is to have a driver that doesn't "think"
anything about the inks at all.  The thinking is all done a curve design
time in an intelligent way based on a description of the actual ink you are=
 using.

Roy

--- In DigitalBlackandWhiteThePrint@yahoogroups.com, Steve Kale <stevekale@=
b...> 
wrote:
> Guys this stuff is really exciting!  It drives right back to the points I=

> was grappling with a while ago, namely that if one can read a step wedge =
of
> QTR output for a known input that it ought to be possible for an ICC prof=
ile
> to be made to do the mapping.  Unfortunately I do not have the technical
> background ­ you guys clearly do!   You can¹t be far away from a full
> integrated ICC profile approach workflow BUT with the added benefit of be=
ing
> able to manipulate the driver for a range of factors and then regenerate =
the
> ICC profile.  QTR must be but a few steps away from moving from a Same As=

> Source workflow to using the generated ICC profile for the QTR driver, in=
k,
> paper, printer combination a la the colour workflow many are used to.  I
> guess it just depends which side of the fence you want to put the
> translation.   I look forward to going through this stuff in more detail.=
  I
> am still trying to fully get my head around the earlier partitioning
> work....so little time!
> 
> 
> From: "Roy Harrington" <roy@h...>
> Reply-To: DigitalBlackandWhiteThePrint@yahoogroups.com
> Date: Thu, 15 Jan 2004 01:26:43 -0000
> To: DigitalBlackandWhiteThePrint@yahoogroups.com
> Subject: Re: [Digital BW] New icc based Soft-proof profiles for QTR
> 
> 
> Hi All,
> 
> I've done a short write up with all the needed files and information.
> Download from here.
> 
> http://harrington.com/SoftProofing.sit
> 
> I've done this on a Mac but there's no reason this shouldn't work just
> as well on Windows -- locations as probably different.
> 
> Roy
> www.harrington.com
> 
> 
> 
> 
> Please visit the Group Homepage to check the Files, and other resources a=
s
> they are often being updated.
> 
> http://groups.yahoo.com/group/DigitalBlackandWhiteThePrint
> 
> If you wish to receive no emails or just a daily digest, or you wish to
> unsubscribe, please edit your Membership preferences by visiting this sam=
e
> page.
> 
> Please follow these basic guidelines:
> - As threads develop, trim off excess portions of earlier messages to kee=
p
> them short.
> - Good manners are required at all time. No personal attacks or flames.
> Hostile, aggressive or argumentative users may be removed from the
> membership without notice.
> - Keep your posts and threads related to the group topic of digital B&W
> printing. Users who persistently make off-topic posts may be removed from=

> the membership.
> - By posting on this forum you agree to abide by the group rules and
> guidelines, and to abide by the actions and decisions of the group Owner =
and
> Moderators. See "Group Topic, Rules and Guidelines" in the Files section:=

> http://groups.yahoo.com/group/DigitalBlackandWhiteThePrint/files/
> 
> BY PARTICIPATING IN AND/OR POSTING MESSAGES TO THE DIGITAL BW, THE PRINT
> YAHOO! GROUP YOU EXPRESSLY UNDERSTAND AND AGREE THAT THE "OWNER" 
AND
> "MODERATORS" OF DIGITAL BW, THE PRINT YAHOO GROUP SHALL NOT BE LIABLE 
TO YOU
> FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, CONSEQUENTIAL OR 
EXEMPLARY
> DAMAGES, INCLUDING BUT NOT LIMITED TO, DAMAGES FOR LOSS OF PROFITS,
> GOODWILL, USE, DATA OR OTHER INTANGIBLE LOSSES (EVEN IF THE  "OWNER" AND
> "MODERATORS" OF DIGITAL BW, THE PRINT YAHOO GROUP HAVE BEEN ADVISED OF 
THE
> POSSIBILITY OF SUCH DAMAGES), RESULTING FROM: (i) THE USE OR THE INABILIT=
Y
> TO USE THE DIGITAL BW, THE PRINT YAHOO GROUP; (ii) UNAUTHORIZED ACCESS TO=
 
OR
> ALTERATION OF YOUR TRANSMISSIONS OR DATA; (iii) STATEMENTS OR CONDUCT 
OF ANY
> THIRD PARTY ON THE DIGITAL BW, THE PRINT YAHOO GROUP; OR (iv) ANY OTHER
> MATTER RELATING TO THE DIGITAL BW, THE PRINT YAHOO GROUP.
> 
> 
> 
> Yahoo! Groups Sponsor
>  
>  ADVERTISEMENT
>  <http://rd.yahoo.com/SIG=12c6ugfs2/M=267637.4116732.5333197.1261774/
D=egrou
> pweb/S=1705019182:HM/EXP=1074216406/A=1945637/R=0/*http://
www.netflix.com/De
> fault?mqso=60178397&partid=4116732>
> 
> 
> Yahoo! Groups Links
> * To visit your group on the web, go to:
> * http://groups.yahoo.com/group/DigitalBlackandWhiteThePrint/
> *  
> * To unsubscribe from this group, send an email to:
> * DigitalBlackandWhiteThePrint-unsubscribe@yahoogroups.com
> <mailto:DigitalBlackandWhiteThePrint-
unsubscribe@yahoogroups.com?subject=Uns
> ubscribe> 
> *  
> * Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service
> <http://docs.yahoo.com/info/terms/> .
> 
> 
> 
> 
> [Non-text portions of this message have been removed]