backup(restore) files in a printed paper

[psionics]

I found a software for it and it is open source:
http://ollydbg.de/Paperbak/

my request is, how about implementing this app for android phones? but instead of scanner, to use a high-res camera.

[ayryq]

Have you tested data recovery using a photograph rather than a scan?

[ayryq]

Also I wonder if the program accepts JPG input, or is a bmp conversion required first?

Note: I am just thinking aloud (such as it is). I have no ability whatever to actually accomplish what you want. However I think the original program is pretty neat; I'd never heard of such a thing. Funny how a concept that seems like it should belong in the 1970s is really something like a predecessor to a QR code.

[4wd]

I remember watching an item on BBC's Tomorrow's World where they used something similar to QR codes to do the same thing - I think that was back in the '80s.

How much data are you talking about?

There are already QR code generators/readers available for Android that will let you encode/decode text.

[mwb1100]

See this thread from way back:  http://www.donationcoder.com/forum/index.php?topic=10216.0

Interestingly, even though it's a discussion largely about PaperBack, I didn't seen an actual link to PaperBack itself - just a link to a page (now defunct) talking about it and presumably providing a link.

[ayryq]

OK, that's actually pretty cool. Inspired by a recent xkcd, I tried the google source code as a data source:

first part of 32-page PDF:


complete ½ page output of paperbak


Edit: source files attached.

[ayryq]

With regards to QR codes, I found on Wikipedia that the longest text string encodable in QR is 1852 characters - not even enough for the first line of the google source I posted (>3000 chars).

There are already QR code generators/readers available for Android that will let you encode/decode text.