Some scanner software can output PDF directly.
That's
probably the easiest approach.
The Lexmark W810 and C710 I used to use did that, but it
was not G4 compressed (not a big deal, but something to
be aware of).
If you have the full Acrobat package (not just the free
Acrobat Reader), it can import common image formats such as
TIFF and JPEG, but you have to do it one at a time. There
Acrobat 4 can import up to 50 files at once. So if you have
scanned to 50 individual TIFFs you can import them all in
one go (it's not that speedy though!). I expect that
Acrobat 5 can also import, but I could never find the
right menu ! What it can do (which 4 and earlier could not)
is spit out a PDF file as individual G4 compressed TIFFs.
Antonio
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Antonio Carlini arcarlini(a)iee.org