[Scribus] Producing per-page diffs of PDFs?

Craig Ringer craig
Tue Mar 20 15:59:33 CET 2007

avox wrote:

> then use Imagemagick's "composite" to calc the image-diffs:
> for i in oldaim-?.png ; do
> composite -compose difference $i   new${i#old}  diff${i#old}
> done
> then check the files diffaim-%.png visually for differences.
> Identical pages should produce a white diff, otherwise the pixels where they
> differ are nonwhite.

That's darn cheeky. Nice idea Andreas.

It could possibly be combined with a simple de-noising / smoothing
filter to remove small, isolated non-white portions and allow easier
identification of non-trivial changed areas. This will help account for
really trivial differences.

Craig Ringer

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