[NTG-pdftex] Creating identical PDF files with different pdfTeX runs
frank at debian.org
Thu Mar 16 19:53:08 CET 2006
Hartmut Henkel <hartmut_henkel at gmx.de> wrote:
> On Thu, 16 Mar 2006, Frank Küster wrote:
>> Reinhard Kotucha <reinhard.kotucha at web.de> wrote:
>> > <pagenumber> <md5sum of the bitmap file>
>> > The bitmap files can be removed by the script when it is finished and
>> > standard UNIX tools can be used to examine the output files.
>> > Particularly, diff(1) can be used efficiently. It will tell you the
>> > numbers of the pages which are different.
>> That's a very good suggestion, thanks!
> this looks pretty fragile to me. Characters will end up in bitmaps with
> interpolated gray pixels, and so it depends not only on pdftex but also
> on any subtlety of the rendering engine. And if the md5sum doesn't
> match, you know nothing without the original file.
Yes, we definitely need the original file.
> Maybe some
> crosscorrelation between images with some given tolerance limit would be
Any hints what I could use for such a purpose?
Single Molecule Spectroscopy, Protein Folding @ Inst. f. Biochemie, Univ. Zürich
Debian Developer (teTeX)
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