3 ms·

Right. Jbig2 supports lossless compression. I'm not very familiar with the bug, but it could have been a setting somewhere in the scanner/copier that it was cha

Right. Jbig2 supports lossless compression. I'm not very familiar with the bug, but it could have been a setting somewhere in the scanner/copier that it was changed to lossy compression instead. Or they had lossy compression on by default or misconfigured some other way (probably a bad idea for text documents).

namibj 8y ago
The bad thing was that it used lossy compression when copying. That was the problem.
- gsich 8y ago
  No. The bug was when using the "Scan to PDF" function. It happened on all quality settings. Copying (scanning+printing in one step, no PDF) was not effected.
  - namibj 8y ago
    I remember differently, but I don't want to pull up the source right now. I did check some of the sources, but was not able to find the one I remember which had statistics on it. The xerox FAQ to it does lead me to consider that I might be confusing this with some other incident though, as they claim that Scanning is the only thing that is affected.
    - gsich 8y ago
      https://media.ccc.de/v/31c3_-_6558_-_de_-_saal_g_-_201412282300_-_traue_keinem_scan_den_du_nicht_selbst_gefalscht_hast_-_david_kriesel https://media.ccc.de/v/31c3_-_6558_-_de_-_saal_g_-_201412282... I'd believe him more then any other source.
      - poizan42 8y ago
        He did his presentation in english at FrOSCon 2015, can be seen here: https://www.youtube.com/watch?time_continue=95&v=c0O6UXrOZJo https://www.youtube.com/watch?time_continue=95&v=c0O6UXrOZJo