Hacker News new | ask | show | jobs
by jay-anderson 2922 days ago
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).
1 comments
namibj 2922 days ago
The bad thing was that it used lossy compression when copying. That was the problem.
link
gsich 2922 days 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.
link
namibj 2922 days 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.

link
gsich 2922 days ago
https://media.ccc.de/v/31c3_-_6558_-_de_-_saal_g_-_201412282...

I'd believe him more then any other source.

link
poizan42 2921 days ago
He did his presentation in english at FrOSCon 2015, can be seen here: https://www.youtube.com/watch?time_continue=95&v=c0O6UXrOZJo
link