Synth-DIY Yahoo! Groups Archives

Moiré problems

2014-03-26 by Peter Marquis-Kyle

I am trying to print a copy of a 19th century wood engraving -- you can 
see the image on this page: http://www.marquis-kyle.com.au/mt/002036.php

The fine near-parallel engraved lines produce disturbing moir\ufffd patterns 
in the print in areas of similar tone, such as in parts of the sky. The 
same problem, in more extreme form, can be seen in various 
magnifications of the zoomify image on the web page.

Can anyone here give me some ideas for processing the image to avoid 
this problem in the print, while retaining as much detail as possible?

I'm using Photoshop CS6 Extended to make a gray scale TIF, for printing 
on an Epson R2400 on Hahnemuhle PhotoRag via QuadtoneRIP.

-- 

Peter Marquis-Kyle

Re: [Digital BW] Moiré problems

2014-03-26 by Mark Savoia

Was the original scanned or digitaly photographed?

Mark
www.stillrivereditions.com

On Mar 26, 2014, at 12:44 AM, Peter Marquis-Kyle wrote:

I am trying to print a copy of a 19th century wood engraving -- you can
see the image on this page: http://www.marquis-kyle.com.au/mt/002036.php

The fine near-parallel engraved lines produce disturbing moiré patterns
in the print in areas of similar tone, such as in parts of the sky. The
same problem, in more extreme form, can be seen in various
magnifications of the zoomify image on the web page.

Can anyone here give me some ideas for processing the image to avoid
this problem in the print, while retaining as much detail as possible?

I'm using Photoshop CS6 Extended to make a gray scale TIF, for printing
on an Epson R2400 on Hahnemuhle PhotoRag via QuadtoneRIP.

--

Peter Marquis-Kyle

Re: [Digital BW] Moiré problems

2014-03-26 by John Castronovo

I think this problem is going to continue to be an issue no matter what you 
do short of blurring the lines. They run in all directions and depending on 
the display size and resolution they will create moir� or not, so it's a 
problem on the viewer's end. Maybe you should present it blurred into a 
continuous tone image for the small view, using a median filter or whatever 
you prefer, and then skip the zoom and offer a 100% view which can be panned 
or shown full screen. It's all those in between sizes that create the worst 
moir� patterns. And of course angle the original on the scanner for the 
least offensive result too.

Show quoted textHide quoted text

-----Original Message----- 
From: Peter Marquis-Kyle
Sent: Wednesday, March 26, 2014 12:44 AM
To: DigitalBlackandWhiteThePrint@yahoogroups.com
Subject: [Digital BW] Moir� problems

I am trying to print a copy of a 19th century wood engraving -- you can
see the image on this page: http://www.marquis-kyle.com.au/mt/002036.php

The fine near-parallel engraved lines produce disturbing moir� patterns
in the print in areas of similar tone, such as in parts of the sky. The
same problem, in more extreme form, can be seen in various
magnifications of the zoomify image on the web page.

Can anyone here give me some ideas for processing the image to avoid
this problem in the print, while retaining as much detail as possible?

I'm using Photoshop CS6 Extended to make a gray scale TIF, for printing
on an Epson R2400 on Hahnemuhle PhotoRag via QuadtoneRIP.

-- 

Peter Marquis-Kyle

------------------------------------

Please visit the Group Homepage to check the Files, and other resources as 
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 same 
page.

Please follow these basic guidelines:
- As threads develop, trim off excess portions of earlier messages to keep 
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 \u201cGroup Topic, Rules and Guidelines\u201d 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 \u201cOWNER\u201d AND 
\u201cMODERATORS\u201d 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  \u201cOWNER\u201d AND 
\u201cMODERATORS\u201d OF DIGITAL BW, THE PRINT YAHOO GROUP HAVE BEEN ADVISED OF THE 
POSSIBILITY OF SUCH DAMAGES), RESULTING FROM: (i) THE USE OR THE INABILITY 
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 Links

-----
No virus found in this message.
Checked by AVG - www.avg.com
Version: 2014.0.4354 / Virus Database: 3722/7248 - Release Date: 03/25/14

Re: [Digital BW] Moiré problems

2014-03-27 by Peter Marquis-Kyle

Thanks to everyone who made suggestions -- very helpful. I'm pleased to 
report that re-scanning at higher resolution did the trick!

-- 

Peter Marquis-Kyle

Digital BW, The Print

Moiré problems

Moiré problems

Re: [Digital BW] Moiré problems

Re: [Digital BW] Moiré problems

Re: [Digital BW] Moiré problems

Move to quarantaine