> You could use pdftoimages to extract the embedded images and check the > resolution.
I actually gave that a try, seems that it's a 16k x 12k pixel pbm file embedded inside… wonderful. Seems that the plotter used to scan these things scans at 400 dpi, because that would make the resulting images a perfect 42" x 30". We're going to use that as a sanity check at least. Thanks for the suggestions! -- Ralph G. (co-founder of plangrid.com, blueprints on the iPad) On Thursday, February 9, 2012 at 12:26 AM, Adrian Johnson wrote: > On 09/02/12 11:30, Ralph wrote: > > Hi Folks, > > > > This isn't really a poppler issue, but I was hoping that someone on > > the list might have some experience dealing with this edge case. > > > > The PDFs that we process with pdftoppm are regularly sized 42" x 30" > > and often contain scans of rasterized data. Once in a while, > > whomever made the scans screws up and puts in 8.5 x 11, even though > > it's *actually* 42" x 30". Obviously the 150 dpi is far too low and > > the output quality is horrible. > > > > There's a slight chance that the PDFs might actually be 8.5" x 11" so > > doing a brute force DPI increase might not be a good idea. Does > > anyone have any good workflows for these sorts of mess-ups? Or is > > scaling the DPI based on the size difference (544 x 388 -> 3168x2448) > > the only approach? > > > > You could use pdftoimages to extract the embedded images and check the > resolution. > > > > > Here's the pdfinfo dump of the failure: ---- Tagged: no Pages: 1 > > Encrypted: no Page size: 544.32 x 388.8 pts Page rot: 0 File size: > > 881061 bytes Optimized: no > > > > PDF version: 1.6 ---- > > > > Here's a pdf dump of what we expect: ---- Pages: 1 Encrypted: no Page > > size: 3168 x 2448 pts Page rot: 0 File size: 523131 bytes Optimized: > > no PDF version: 1.4 > > > > > > ---- > > > > I'd be happy to mail anyone the original files if needed (there > > semi-sensitive, so I didn't want to post them to the list). Thanks > > for anything :) We *really* enjoy using poppler. > _______________________________________________ poppler mailing list [email protected] http://lists.freedesktop.org/mailman/listinfo/poppler
