Скайнет подкрался незаметно: ксероксы могут менять цифры в накладных

[mayk]

http://www.dkriesel.com/en/blog/2013..._when_scanning

Edit: In the last section, it is now sketched that the reason for the issue may be a misconfigured JBIG 2 compression.

In this article I present in which way scanners / copiers of the Xerox WorkCentre Line randomly alter written numbers in pages that are scanned. This is not an OCR problem (as we switched off OCR on purpose), it is a lot worse – patches of the pixel data are randomly replaced in a very subtle and dangerous way: The scanned images look correct at first glance, even though numbers may actually be incorrect. Without a fuss, this may cause scenarios like:

1. Incorrect invoices
2. Construction plans with incorrect numbers (as will be shown later in the article) even though they look right
3. Other incorrect construction plans, for example for bridges (danger of life may be the result!)
4. Incorrect metering of medicine, even worse, I think.