20 Jun
2006
20 Jun
'06
2:24 p.m.
> We've got about a million ICL fiches too that
could benefit from
> scanning, but luckily those are just a single A4 page per fiche and so
> a little more manageable.
You should be able to get very good images off of something that large.
Scanning DEC fiche is a nightmare. Some is 25 x 13 frames (and NOT Computer
Output to Microfilm). Total garbage even at 48x. The COM listings come out OK
but there is just so MUCH (thousands of sheets) to do.
Sadly, scanning from the original paper is a MUCH better source, but most of
the paper was thrown out when they were converted to film.
20 Jun
20 Jun
2:45 p.m.
I have some old ACM CALGO fiches here (4x5") about 25x15 pages per and, out
of curiosity, scanned them on a Canoscan with film capabilities at 1200 and
then 2400 dpi.
Nothing recognizable other than title pages. But then, a little
back-of-the envelope math tells me to expect that. Given 25 pages across
the 5" width, a single page occupies less than 0.20 inches. Even at 2400
dpi, that's only 120 dots per page (actually, given the blank space around
the page, it's probably closer to 80.
Cheers,
Chuck
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