Thank you both Matt and Leonard for your replies. Unfortunately they don't really make me hope to find a solution. :-(
Matt, I've already tried the approach with Ghostscript. I converted the PDF into Postscript and PCL. While the Postscripts were always different, the PCL was the same - unfortunately only the same day. A few days later I ran the same tests, but now the file sizes were different: 3 bytes shorter than before. I'd need to confirm that the print output is the same as before: i.e. text and structure. Could you please elaborate a bit more about the Ghostscript approach and which target format to choose? Thanks a lot. Andreas On 17 Jul 2003 at 9:12, Matt Benson wrote: > Depending on what you want to compare, you could have > some options... > > if you wanted to compare the text, you could use some > form of text extraction from JPEDAL, PdfBox, or one > more I can never think of... and compare the text, or > generate checksums from text and compare those (works > for me). > > if you wanted to compare exact visual representation, > you could use JPEDAL or ghostScript to convert the > PDFs to images and compare those, or again, generated > checksums. > > -Matt > > --- Leonard Rosenthol <[EMAIL PROTECTED]> wrote: > > At 9:47 PM +0200 7/16/03, Andreas Probst wrote: > > >I'm developing an application which creates PDF > > files. > > > > OK. > > > > > > >To automatically test this application, I'd need > > to compare PDF > > >documents, i.e. compare the current output of the > > app to once > > >created and verified reference files. > > > > What would you compare? Visible output? > > Structure? Both? > > > > > > > Unfortunately two PDF files seem to be never > > binary equal, even if > > >they look the same on the screen or on paper. > > > > Correct. PDF files are quite complex entities and > > it is > > possible to have two files that are NOTHING alike in > > their file > > format, but produce the same visible results. > > > > > > > > >Is it possible to compare two files with iText? > > > > No. > > > > The only thing that attempts this is Adobe > > Acrobat... > > > > > > Leonard > > -- > > > ----------------------------------------------------------------- > ---------- > Leonard Rosenthol > > <mailto:[EMAIL PROTECTED]> > Chief Technical Officer > > <http://www.pdfsages.com> > PDF Sages, Inc. > > 215-629-3700 (voice) > > > 215-629-0789 (fax) > > > > ------------------------------------------------------- > This > SF.net email is sponsored by: VM Ware > With VMware you can run > multiple operating systems > on a single machine. > WITHOUT > REBOOTING! Mix Linux / Windows / Novell > virtual machines at the > > same time. Free trial click here: > > http://www.vmware.com/wl/offer/345/0 > ------------------------------------------------------- This SF.net email is sponsored by: VM Ware With VMware you can run multiple operating systems on a single machine. WITHOUT REBOOTING! Mix Linux / Windows / Novell virtual machines at the same time. Free trial click here: http://www.vmware.com/wl/offer/345/0 _______________________________________________ iText-questions mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/itext-questions
