On Mon, 13 Dec 2004, Steven Buehler wrote:
> > -----Original Message-----
> > From: slug@nks.net [mailto:slug@nks.net] On Behalf Of Levi Bard
> > Sent: Monday, December 13, 2004 11:51 AM
> > To: slug@nks.net
> > Subject: Re: [SLUG] PDF to TIFF to scale
> >
> > On Mon, 13 Dec 2004 10:02:31 -0500, Mario Lombardo
> > <mario@alienscience.com> wrote:
> > > I'm doing the following conversions to achieve a PDF --> TIFF to scale.
> > > It's with 24x36" paper. The final image must be to scale.
> > >
> > > pdftoppm -mono /the/pdf/document.pdf /the/resultant/PBMdocument.pbm
> > > mogrify -format tiff -compress Group4 PBMdocument.pbm
> > >
> > > The final TIFF image ends up 150% bigger. It actually occurs with
> > > pdftoppm. I have no idea why.
My guess is that .p[bgp]m does not store resolution, and so mogrify takes a
default resultion, probably 72 dpi.
> > Is tiff one of those formats that has the print resolution embedded in
> > it?
I'm pretty sure at least one variant of TIFF does.
> > If not, try adjusting the image resolution with mogrify.
Even if so, if my hypothesis is correct, you need to do so.
> Why not just use 'convert pbmdocument.pdf pbmdocument.tif'?
I vote for that, as it has the highest probability of retaining the original
resolution.
> Or, 'pdf2ps pbmdocument.pdf; convert pbmdocument.ps pbmdocument.tif' ?
You may be able to supply "-" to pdf2ps, to avoid writing an intermediate
file to disk. You'd still have to store the resolution somewhere. If this
is a conversion you do several times, I'd recommend writing a script to
parse the pdf's resolution, and then supply it to mogrify.
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