Live data from Hacker News

Reverse OCR

reverseocr.tumblr.com

21–30 of 92 posts

Re: Reverse OCR

#21
post #5

Perhaps this could lead to a new kind of captcha that only bots can solve. I doubt it would be efficient, though.

Startup idea: create a CAPTCHA that humans recognize as one word, but OCR recognizes as a different word.

Re: Reverse OCR

#23
post #3

This could be a cool way to visually "encrypt" messages. They're readable, but only by the correct tool. I wonder how these squiggles might be creatively arranged steganographicly in an image and still be "read" by the OCR tool.

Correct me if I'm wrong here, but that just seems like reinventing crypto with a large key, and requires you to implement a counterparty-provided algorithm, which could be malicious.

Re: Reverse OCR

#24
post #23
post #3

This could be a cool way to visually "encrypt" messages. They're readable, but only by the correct tool. I wonder how these squiggles might be creatively arranged steganographicly in an image and still be "read" by the OCR tool.

Correct me if I'm wrong here, but that just seems like reinventing crypto with a large key, and requires you to implement a counterparty-provided algorithm, which could be malicious.

The point of steganoraphy is that no realizes there's a message.

Re: Reverse OCR

#25
post #12

What (if anything) is this saying about the quality of the OCR process? Especially since none of these seem human readable.

Not much, probably. It would be largely wasted effort to tune OCR algorithms to avoid (falsely) recognizing letters in artificially synthetized datasets that don't occur in practice.

Re: Reverse OCR

#28
This is pretty cool, although it makes me wonder what the real world applications could be. It does, at the very least, tantalise my curiosity and gets me thinking.

Re: Reverse OCR

#29
post #27

This is similar to the project where images of clouds were fed to face recognition software: http://ssbkyh.com/works/cloud_face/

I'm also intrigued by the cat vs human face recognition results!
Post reply on HN