Digital BW, The Print

I'm scanning on an 848 - 16bit RGB , gamma 2.2 and checking the black
and white points in the levels dialog to make sure that I'm not clipping
anything at the ends.
I've been recently doing my grayscale conversions with the imaging
factory plugin "Convert to BW Pro" 
www.theimagingfactory.com <http://www.theimagingfactory.com/> 
The plug gives me much more control than I ever had with channel mixer,
calc, Russell Brown's dual huesat layers, etc.
 
 
 
Stan Shire
Associate Professor/Department Chair
Photographic Imaging
Community College of Philadelphia
Adobe Photoshop 6 A.C.E.
 
215 751-8320
 <mailto:sshire@...> sshire@...
-----Original Message-----
From: Mitch Alland [mailto:malland@...] 
Sent: Friday, August 30, 2002 12:25 PM
To: DigitalBlackandWhiteThePrint@yahoogroups.com
Subject: [Digital BW] Imacon Scanning for Piezography
 
--------
[I posted this message on the Piezography list a few days ago; as I have
ot had any responses there, I am reposting this message here]
-------

On the Imaconusers forum someone posted an interesting message stating
that for Piezography printing he scans with his Imacon 848 the following
way in order to get the longest possible tonal range:

-scan into into 16-bit grayscale rather than RGB
-set the the histogram to -2 black and -2 white and manually adjust the
curves
-gamma set at 1.8

Of course this does result in a long-tone scan but needs substantial
adjustment work in Photoshop. Also, the Preview does not match the Final
Scan because the Imacon scanning software does not provide for inclusion
of profiles in grayscale scans. But this obviously does not matter in
this type of scanning workflow when one is going for the longest tonal
range possible. He states that scanning at 1.8, rather than the 2.2 most
people use, gives the best reproduction and the greatest control over
seperating different tones.

My own scanning workflow with my Imacon PII is to scan into 16-bit RGB
at gamma 2.2 and then to use Channel Mixer in Photoshop when converting
to grayscale.. In addition, I make curve adjustments and use the gray
eyedropper tool to set neutral tones in the Imacon software. Then I make
final adjustments in Photoshop. Perhaps the grayscale scanning workflow
outlined above is better for Piezography workflow than my RGB workflow
because the Preview image in the Imacon software is not as accurate as
that of Photoshop.

If you have experience with Imacon scanning or similar exoperience with
other scanning software, please let me have your reaction.

--Mitch/Bangkok





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