That’s mostly technobabble in that quora answer.
I was actually linking the answer by Oliver Emberton, which was on top at the time (#2 right now). Sorry for that.
Some the links in that answer are really interesting:
Pixel Perfect: Fingerprinting Canvas in HTML5
Reverse-engineering the new “captchaless” ReCaptcha system…
I’m not a human: Breaking the Google reCAPTCHA [this was submitted to lobste.rs here]
I agree… I was hoping for something interesting, not a patent promotion.
Not sure if it’s appropriate to post this so apologies if not - there’s an excellent little video of a (physical) robot ticking the box (and it works): https://www.youtube.com/watch?v=fsF7enQY8uI