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pdf-digest <[EMAIL PROTECTED]> schrieb/wrote: > Date: Sat, 28 Feb 2004 10:25:22 -0500 > From: Mitchell Turner <[EMAIL PROTECTED]> > Subject: Re: [PDF] Huge PDF files from quark 6 (on mac) > > The PDF list is a service provided by PDFzone.com | http://www.pdfzone.com > __________________________________________________________________ > > Don't know if anyone mentioned this but I've had Quark files that > appear to be roughly double the size they should be when distilled. > The specs for the files are typically; 32 page facing spreads, saved as > single page postscript file. > I've found that if a picture box extends even slightly over to the > opposing facing page, that the image will be included in the postscript > file twice. > This is a pain because often a picture box from one page will cross > over and it looks like the entire image is included in the postscript > and the distilled pdf. > > - -Mitch Turner Mitch, that's strange because - QuarkXPress, as nearly every professional layout application, does include only the 'visible' data portion of TIFF images into the PostScript code - even if this mechanism would fail or EPS image would be used instead of TIFF images (where this kind of output optimization would fail), Acrobat Distiller has the capability to analyze which parts of an image are visible/needed and which not. So at least at the PDF creation stage all unneeded image information will be removed by Distiller. So it's possible that the PostScript code is pretty large (especially if cropped EPS images are used or readers spreads with images spreading from one page over the over) but the PDF file should be optimized though because of Distiller's clever coding. One reason why the PostScript code could be bigger especially on the Mac OS X platform is the standard encoding used here. By default Mac OS X produces ASCII85 encoded data which generates roughly 1.3 times as much data as a binary encoding. I haven't checked this in detail yet but it seems that QuarkXPress 6.x produces instead of ASCII85 (as Adobe applications do) ASCIIHex encoded data to fulfill the ASCII clause. This means twice as much data as binary encoding! Regards Robert Zacherl -- ***************************** Robert Zacherl IMPRESSED GmbH Tel:++49(0)40/89 71 89-0 Fax:++49(0)40/89 71 89 71 eMail: [EMAIL PROTECTED] http://www.impressed.de ***************************** To change your subscription: http://www.pdfzone.com/discussions/lists-pdf.html
