On approximately 6/29/2009 4:05 PM, came the following characters from the keyboard of Ross Presser: > In fact, the single image contained on the page is 2236x3025 pixels and > 8.89"x12.1", giving a resolution of 250 dpi, not 300 dpi. > > ImageMagick won't know this, of course; I dug it out using Acrobat 9.0 Pro's > measurement and preflight tools.
Hmm. So if Acrobat 9.0 Pro can figure out the "native" dpi, why can't other tools do it? I suppose it is "hard" or "undocumented"? It seems that mostly it is Ghostscript that is used to look at .ps and .pdf files... if it could learn how to report on the dpi, it seems the world would be a better place.... Guessing random dpi values until it "looks good" (and bigger dpi values don't look "better") is a poor way of proceeding.... I suppose different images contained within a .pdf or .ps file might have different resolutions. I'd like to know if there is a tool that exists that can do either or both of the following: 1) extract embedded image characteristics from .ps and .pdf files, so that an appropriate dpi setting can be used to convert the whole file to raster. 2) extract the embedded images to .tif or .png format, retaining the exact pixels, and setting the dpi to achieve the scale at which it was embedded. Do tools like these exist? How much do they cost, or where can they be obtained? _______________________________________________ Magick-users mailing list [email protected] http://studio.imagemagick.org/mailman/listinfo/magick-users
