Path: utzoo!mnetor!tmsoft!torsqnt!jarvis.csri.toronto.edu!rutgers!att!watmath!watserv1!watdragon!dahlia!rsingh1
From: rsingh1@dahlia.waterloo.edu
Newsgroups: comp.sys.amiga
Subject: Digiview (old): Why do I get slightly rotated digitizations?
Message-ID: <18635@watdragon.waterloo.edu>
Date: 25 Nov 89 04:53:23 GMT
Sender: daemon@watdragon.waterloo.edu
Reply-To: rsingh1@dahlia.waterloo.edu ()
Organization: U. of Waterloo, Ontario
Lines: 40

I've had a digiview for a long time now, and followed it through a few
revisions of it's software.  But ever since the beginning, I've been
bothered by a problem:
 
Setup:   A1000 w/1.5 megs, no HB, 68010

I don't own a camera, but I've used about 6, ranging mostly from sony
camcorders (home -> low end industrial), a few hitachi's too.  Never
a black and white on my digitizer (used it though).

My problem is that I set everything up square, on a home made copy-stand,
and digitize a test pattern.  Just squares and circles to set the aspects
up correctly for the camera I'm using.  But even though everything's square,
the digitization comes up at a 2 to 3 degree angle.  This is trouble, because
I usualy need to digitize B+W line-art, and I can't have one end of it
a pixel higher than the other end.
 
In the beginning, I tried compensating with the perspective tool in DpaintIII,
with anti-alias set to medium, or high, and a 1 degree angle of rotation.
 
While this worked, it wasn't satisfactory, because I lost plenty of detail.
 
I have created a widget at a bit of an angle, to mount papers against, 
but it can slip, and the rotation seems to change with different cameras
just a tiny fraction.
 
 
Question: 
 
Why does this happen?  Is it a problem associated only with the older
digi-views?  Or is it my choice in cameras?  Can the problem be corrected? 
 
Would I be better off to go and buy a Digiview Gold, and the gender bender
thing?  Or will the bender create a loss in quality (I heard a rumor to that
effect).  Finally, are the new Digiviews really 'THAT' much better than my
older model?
 
Thanks for your time.
 
Paul Sop