On Thu, 27 Dec 2012 10:41:17 -0500 Bill Davidsen <davidsen@xxxxxxx>
wrote:
> agraham wrote:
> > Assuming you have source file(s) that are not already PDF, use Open Office and
> > export it as PDF at which point you have all the scaling/compression options
> > available.
> >
> The way to get a smaller file is not to compress what you have, but to generate
> smaller PDF in the first place. Unfortunately PDF doesn't do a great job of
> selecting compression options for you, so you have to do the "think work" for
> it, choose compression (jpeg vs. lz), and such.
>
> Hint: if you have a lot of graphs, line drawings, and similar, reduce them to
> b/w (if appropriate) PNG, rather than greyscale and/or jpeg. Pages in b/w can be
> encoded with jbig and will be tiny compared to almost any other format.
Thanks, I was hoping that there might be a more ready solution but
this (converting all pdf image files to png - and I had north of 50 pdf
files) is exactly what I have now done, using ImageMagick and a perl
script as follows:
#!/usr/bin/perl
use strict;
my @pdfs = `ls *.pdf`;
for my $pdf (@pdfs) {
chomp $pdf;
my $file = $pdf;
$file =~ s/.pdf$//;
print STDERR "convert $file.pdf $file.png\n";
`convert $file.pdf $file.png`;
}
Thanks again for all the helpful suggestions! The file size comes down
from 36 MB to 6.4 MB.
Ranjan
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