[gs-devel] Default resolution not properly calculated for raster pdf files

[Hans-Werner Hilse]

Hi,

On Fri, 19 Oct 2007 11:35:13 -0700
Ralph Giles <giles at ghostscript.com> wrote:

> There are image extraction tools which can pull the scanner images
> out of the original PDF, doing a lossless transcode to a standard
> format if necessary. That's a more efficient approach for scanned
> documents, but not something Ghostscript does.

I'd like to add here: In order to do that, I suggest to look at the
pdfimages utility that comes with Poppler/Xpdf.

In worst case, however, a PDF page of that document contains not one,
but multi-thousands of separate images which form a nice mosaique that
looks like one image.

The PDF in the URL given, however, extracts fine. The images within
seem to be scanned at exactly 300dpi, if my math is correct here...

-hwh