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And this happens when fingers that were used to hold down a book's page to be scanned were captured, and a software "repairs" this space automatically afterwards. In short: the scanned image is corrected by filling the problematic space with new content. In this case, this filling didn't fit too well: you see a "en=" text part from a different print, and some very bad pixel space. Welcome to the complex digital narrative of old printed books.

A loud shout out to the finger image removal technologies. You all contribute to making with access to the originals worth while.

Is it a ghost? Is it a cloud? No, it is just a weird space created by a finger image removal technology trying to autocorrect the finger of the scanning person.

Welcome to another striking example of how automatic repair systems do crush our digital heritage.

And here the ghost aka cloud is slowly taking over the page.

Welcome to yet another example of how automatic repair systems - to be precise: finger image removal technology trying to autocorrect the finger of the scanning person - do crush our digital heritage.

And another weird space created by a finger image removal technology trying to autocorrect the finger of the scanning person. The inserted sample clearly does not fit in here (or anywhere else in this print, to be honest).

That's a kind of data corruption, if you ask me. Automatic repair systems do corrupt our digital heritage.

Again: the inserted sample clearly does not fit in here.

Another weird space created by a finger image removal technology trying to autocorrect the finger of the scanning person. Automatic repair systems corrupt digital heritage.

Daniel Bellingradt

It looks like another text is trying to invade.

Well, that's just another weird space created by a finger image removal technology trying to autocorrect the finger of the scanning person. Automatic repair systems corrupt digital heritage.

@dbellingradt Have there been cases in which this technology introduces typos or unwanted rewordings in the main text?

@dbellingradt
We wouldn't want delicate scholar eyes to see methods of production.

@dbellingradt unfortunately(?) someone will meme this image with the caption "How shatGPT reads books" .

@dbellingradt As technologies like this become more sophisticated, their mistakes will become more plausible and harder to detect.

The canary bug for this kind of issue is the Xerox WorkCentre JBIG2 bug of 2013.

theregister.com/2013/08/06/xer

The Register · Xerox copier flaw changes numbers in scanned docsBy Iain Thomson