DEC RL02 anyone need one?

From: Kevin Handy <kth_at_srv.net>
Date: Tue Jun 3 15:07:00 2003

Al Kossow wrote:

>Can you scan fiche yet?
>
>--
>
>No, that project is probably not going to happen this year.
>Too many other things going on right now.
>
>
>
What kind of resolution is necessary for scanning microfiche?

2400dpi scanners are becomming moderately cheap and common,
capable of scanning negitives, but is this enough density for a
readable copy from microfiche? iirc. a page is about 1/4" on the
fiche (or am I remembering wrong? Haven't held fiche in years),
which would give you (.25 * 2400) = 600bits/wide. Assuming
it's from an 8-1/2" sheet, (600 / 8.5) = 70, which would come to
about 70 dpi relative scan density. A little low for OCR, but is
it readable?

If you need larger size, how hard would it be to project a
microfiche image onto a sheet, and to scan that?
You shouldn't need to make a single page image much
larger than a 1" wide to get something scannable.
(2400 * 1")/8.5 = 282 dpi equivelent. Probably good enough
for OCR if it's not to blurry.

Just thinking strange ideas. Wish I had some fiche to try.
Received on Tue Jun 03 2003 - 15:07:00 BST