I scan my black and white ink drawings straight into black and white at
1200 ppi with very good results. I did a few experiments to get the
right threshold levels. I would recommend you give this a try and
compare to the results from more complex methods.
Projet Officer (Botanical Imaging)
Department of Science, IT, Innovation and the Arts (DSITIA)
Brisbane Botanic Gardens Mt Coot-tha
Mt Coot-tha Road, Toowong, Queensland, Australia 4066
Phone: (07) 38969508
From: SciArt-L Discussion List-for Natural Science Illustration-
[mailto:[log in to unmask]] On Behalf Of Kathryn Killackey
Sent: Saturday, 27 July 2013 5:45 PM
To: [log in to unmask]
Subject: [SCIART] Processing pen and ink stippled illustrations in
I was wondering if anyone could share their method for cleaning up
stippled illustrations in photoshop? I create a lot of pen and ink
stippled illustrations of archaeological artifacts. I have always been
dissatisfied with how they turn out digitally. They seem somehow
diminished once I'm done scanning and processing them.
My usual method: I ink with Koh-i-noor Rapidograph pens and ink on
Permatrace (a British brand of Duralene). I then scan at 600 ppi. The
scan always turns out a bit grey so I then take it in to Photoshop to
get it back to black and white. In Photoshop I mess around with a curves
adjustment layer and go in and clean up stubborn grey areas with a
brush. This method sometimes works better then others. I find that
sometimes I have to push the curves so far to get to straight black and
white that the stipple dots are reduced.
I've just found this video on Youtube:
which selects and fills the background with white before using curves.
It's definitely an improvement but I still get grey in areas of dense
stipple and cleaning that up by hand is time consuming.
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