Re: [Gimp-user] resolution, size when extracting from pdf vs. imagemagick

[Joel Rees <joel rees gmail com>]

2015/07/07 16:07 "Pat David" <patdavid gmail com>:
> The pdf can be exported at any resolution you ask.
> It's the reason you can specify which density you want on import.

For some reason, I was expecting that dialog to offer the actual resolution
of the encapsulated jpeg image as a default. Would be nice to have a radio
button or checkbox for extracting bitmap class images unrendered, or
something.

> (Imagemagick has a couple of options for handling this:
> http://www.imagemagick.org/discourse-server/viewtopic.php?t=8707 ).

That was exactly what I was having trouble finding. Thanks.

Someday I'll have to learn how to use script-fu to burst a pdf-enclosed
batch of bitmaps.

Much appreciated.

> What happens when you set the import density higher in GIMP? Desired
results?
> On Tue, Jul 7, 2015 at 2:00 AM Joel Rees <joel rees gmail com> wrote:
> > I have a pdf of scanned images, theoretically jpeg images, and the gimp
> > will offer me a selection dialog, from which it will import them
> > individually as 1304x932 at 100 px/in. (This is odd, because I selected
> > 300dpi at scan time, so the images should be 3 times that pixel density.
> > But, then, 22Mb for 36 images is not 13" x 9" at 300 dpi, unless heavily
> > compressed.)
> >
> > ImageMagick's identify -verbose tells me the same are 1032x728 at 72 dpi.
> > If I use ImageMagick's convert to extract them, that's how they end up.
> >
> > Anyone have an idea what's happening?
> >
> > Joel Rees
> >
> > Computer memory is just fancy paper,
> > CPUs just fancy pens.
> > All is a stream of text
> > flowing from the past into the future.
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