[Coco] Re: [Color Computer] Requesting .pdf help...
Michael Wayne Harwood
michael at musicheadproductions.org
Mon Jul 18 12:18:58 EDT 2005
I had very little success with despeckling algorithms in both the Gimp and
imagemagick... I worked up to a point, but the success varied. I get a lot
more mileage out of the scripts I am using now. Thanks for the help though!
I am receiving better quality scans for the covers from others who are
willing to scan them in and FTP them to my site - I will manually clean the
covers as a last resort only....the amount of work I am doing now is
From: coco-bounces at maltedmedia.com [mailto:coco-bounces at maltedmedia.com] On
Behalf Of Gene Heskett
Sent: Monday, July 18, 2005 10:37 AM
To: ColorComputer at yahoogroups.com
Subject: Re: [Coco] Re: [Color Computer] Requesting .pdf help...
You might investigate a function called 'coreing' where small changes are
removed by subbing a known good value for the pixels with the dust spots
etc. That way, if a color only changes 5-10% in intensity, its removed and
that can reduce the size of the compressed image. Some programs like the
gimp or imagemagick may call it despeckle too, the functions are very
similar. The gimp gives you a speckle size control so it pulls the small
Your skid marks etc on the test2.pdf cover are big enough to need to grab a
sample of the right color and overbrushing though. Tedious work, leads to
carpel tunnel syndrome here, so I don't do a lot of that.
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