Re: [OT] scanned files are large in size
On Wed 02 Jan 2019 at 22:50:10 (-0500), kamaraju kusumanchi wrote:
> On Wed, Jan 2, 2019 at 6:33 AM Jörg-Volker Peetz <jvpeetz@web.de> wrote:
> >
> > With the pdf-files from my Canon scanner, I did shrink them with the help of
> > ghostscript:
> >
> > $ ps2pdf old.pdf new.pdf
> >
>
> This does not help. The file sizes are more or less the same (if
> anything, they are slightly larger).
That's my usual experience too. However, I looked around for an old
PDF and found a magazine distributed by my old employer. I could halve
the file size as above. Looking at the original, there's a lot more
legible XML (like image metadata) though it's difficult to tell if
that accounts for the difference. I think it was produced on a Mac;
most of the images certainly were.
$ pdfinfo /tmp/original.pdf
Creator: Adobe InDesign CS3 (5.0.2)
Producer: Adobe PDF Library 8.0
CreationDate: Thu May 1 05:47:22 2008 CDT
ModDate: Thu May 1 06:21:43 2008 CDT
Tagged: no
UserProperties: no
Suspects: no
Form: AcroForm
JavaScript: no
Pages: 48
Encrypted: no
Page size: 595.276 x 841.89 pts (A4)
Page rot: 0
File size: 7297299 bytes
Optimized: no
PDF version: 1.6
$ pdfinfo /tmp/new.pdf
Creator: Adobe InDesign CS3 (5.0.2)
Producer: GPL Ghostscript 9.26
CreationDate: Wed Jan 2 22:21:22 2019 CST
ModDate: Wed Jan 2 22:21:22 2019 CST
Tagged: no
UserProperties: no
Suspects: no
Form: none
JavaScript: no
Pages: 48
Encrypted: no
Page size: 595.276 x 841.89 pts (A4)
Page rot: 0
File size: 3769525 bytes
Optimized: no
PDF version: 1.4
$
Cheers,
David.
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