Scanning old manuals

From: Robert Lund <lundo_at_interport.net>
Date: Tue Mar 9 21:07:29 1999

Eric Smith wrote:

> For pages that consist solely of text and line art, scan them as 300 DPI
> TIFF Class F Group 4. That takes only 40-120K per page. I put the
> resulting images into a PDF file, since most people don't have any other
> G4-capable reader, and G4 is supported as a native PDF image format.
> [...]
> Some results of my scanning can be seen at www.36bit.org.

The decsystem-1080/1090 manual is quite readable, and the 136-page 12175kB PDF
file averages out to about 89.5kB/page.

Then,
Sergey Svishchev wrote:

> Example: 39-page A4-size document scanned at 300dpi is 1.5 MB in TIFF
> format (Group 4 Fax compression), 84 MB in Level 1 PostScript (PStill
> does not grok Level 2 PostScript produced by tiff2ps.)
>
> Result: 3.5 MB PDF (could be less, if PStill used CCITTFaxEncoding.)

That comes to about 89.7 kB/page, which agrees with Eric's doc above.

--
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+     Robert Lund     | Out here on the perimeter there are no stars +
+ lundo_at_interport.net |     Out here we is stoned - Immaculate       +
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Received on Tue Mar 09 1999 - 21:07:29 GMT

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