luigi scarso wrote:
$> cmp test-1a.pdf test-1.pdf
test-1a.pdf test-1.pdf differ: byte 35086, line 220
of course at least /ID is different

You could run

  $ diff -a test-1a.pdf test-1.pdf

instead, because diffs in the binary sections are unlikely
in such cases, and it is (relatively) simple to disregard
changes in /ID and /CreationDate.

$>for j in `seq 1 4`; do cmp test-1a--$j.ppm test-1--$j.ppm ; done
and, again of course, *no differences* because the files are equals page-by-page
-- so they are equals

Is there a way more quick and clean than  for cycle and ppm files?
Any idea ?

If the above command gives noticeable difference, afaik bitmap compares
are the only option that is left.

Best wishes,
Taco
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