El Dilluns, 7 de maig de 2012, a les 19:14:54, Carlos Fernandez va escriure: > Albert, > > Thanks for the quick reply.
Please don't answer me, answer to the list, there's no reason to keep the discussion "hidden" to the rest of the world. > I am reading the DPI and image dimensions from Preview on OS X. It > reports the fractions DPI for the 2040x2640 image. Is the DPI > information baked into the image as metadata? No idea to be honest. > >> using "-r 150" (or just relying on the default value of 150) to create > >> an image on a 8.5x11 inch pdf generates an image that is 1275 × 1651 > >> pixels at 150dpi. > > Should this image be 1275x1650? That might make sense. Anyway this is a development list, if you are not planning to develop a fix what you should do is open a bug in bugzilla, it is much easier to keep track of the bugs in there. Cheers, Albert > > Carlos > > On Mon, May 7, 2012 at 5:17 PM, Albert Astals Cid <[email protected]> wrote: > > El Dilluns, 7 de maig de 2012, a les 16:58:27, Carlos Fernandez va escriure: > >> trying to split a pdf into page images using pdftoppm. I would like > >> the resulting images to maintain the same size and scale as the source > >> PDF. unfortunately the images being generated are somewhat > >> unexpected. > >> > >> using "-r 150" (or just relying on the default value of 150) to create > >> an image on a 8.5x11 inch pdf generates an image that is 1275 × 1651 > >> pixels at 150dpi. > >> > >> using "-r 240" to create an image on the same 8.5x11 inch pdf > >> generates an image that is 2040 x 2640 pixels at 239.97 dpi. > > > > Hmmm, really? > > 2040/8.5 = 240 not 239.97 > > 2640/11 = 240 not 239.97 > > > >> these results were consistent for png or tiff output. I got similar > >> results for other dpi settings across a few different PDFs. > >> > >> What can i do to get more consistent results? > > > > What's inconsistent? > > > > Albert > > > >> Carlos > >> _______________________________________________ > >> poppler mailing list > >> [email protected] > >> http://lists.freedesktop.org/mailman/listinfo/poppler > > > > _______________________________________________ > > poppler mailing list > > [email protected] > > http://lists.freedesktop.org/mailman/listinfo/poppler _______________________________________________ poppler mailing list [email protected] http://lists.freedesktop.org/mailman/listinfo/poppler
