logoalt Hacker News

The Reconstruction of Torn Documents

36 points • by jacquesm • last Friday at 9:05 AM • 10 comments • view on HN

Comments

kevin_thibedeau • today at 5:28 PM

> Could shredded paper be reconstructed?

> No. A few thousand other bags contained paper that had been shredded into incredibly small pieces in 1990. This material was destroyed back in 1991 after inspection by the Stasi Records Office. Hence, there is no longer any paper shredded by the Stasi at today's archive .

Shredder chads from the 90s can definitely be reconstructed. This is why the NSA has gradually decreased the maximum size permissible for chads. If they'd held on to that material they could be recovered today.

ceejayoz • today at 5:22 PM

Vernor Vinge's Rainbows End includes this as a minor early plot point; libraries being fed into giant shredders that digitize and stitch together the scraps on their way to the incinerator.

mdbug • today at 5:25 PM

Just scan all the snippets and upload them. Someone will figure it out.

bbor • today at 4:52 PM

Wow, fascinating! I hope I’m not the only OCR-minded soul on here that immediately started thinking of pipelines for this one could assemble from all our new DL-enabled toys… it’s a shame that “some American kid” probably doesn’t meet their contracting requirements.

One thing that kinda baffles is that it sounds like the snippets (I bet that German word is fun) haven’t been scanned(/photographed…?) yet. No matter who they contract with, wouldn’t that necessarily be step #1? Or is the scanning the part that needs contracting, and the “e-Puzzler” name was just a lil melodramatic?

For one thing, I feel like it’ll be wildly helpful that they’re on a variety of papers, not challenging like they imply. Once that and bag index have narrowed down neighbor candidates, you’ve got rules and glyphs to go off of, much less recognizable form layouts. It feels like the Vesuvius scrolls but actually tractable…

kleiba2 • today at 5:17 PM

> Since the project began in 2007, based on contractual obligations, around 6.5 million euros have been paid to Fraunhofer IPK or the Fraunhofer Gesellschaft

> In the fall of 2013, Fraunhofer IPK was able to demonstrate that the software developed by its scientists, the so-called e-Puzzler, works in principle. However, the process proved unsuited for mass production. Overall, the project never achieved the envisaged automated reconstruction rate of at least 80 per cent.

Well, that was tax-payer's money well spent!

➕ show 1 reply
esafak • today at 4:31 PM

There's nothing technical to discuss; where's the meat? This 2012 article at least has pictures: https://www.bbc.com/news/magazine-19344978

I speculate the problem is not technical but financial or otherwise; the ML to do this was up to the task at least ten years ago.

madaxe_again • today at 5:20 PM

  > Could shredded paper be reconstructed?

  > No. A few thousand other bags contained paper that had been shredded into incredibly small pieces in 1990. This material was destroyed back in 1991 after inspection by the Stasi Records Office. Hence, there is no longer any paper shredded by the Stasi at today's archive .

I find the assertion that it was “impossible” to reassemble shredded documents… disappointing - as they seem to be confusing “very difficult with current tools” with “no way of doing it, ever”

I mean, they made sure it was true by burning them all after they decided it could never be done. Phenomenally short-sighted - unless of course there was a reason they wanted those particular documents to never be read.

lifestyleguru • today at 4:28 PM

"We simply rehired all Nazi's and Stasi's but here there is a sophisticated technical problem to keep you busy."