They’re using 2 captchas and turning the cpu power of the ‘evil machines’ to their own ends. Currently that consists of digitising books from the Internet Archive.
Jonathan Katzsays:
The CHS paper is the right reference…don’t their results already give what you want?
Stefan Ciobacasays:
Why do you think that the human error will be the same for the 4 CAPTCHAs? Maybe humans gets tired after filling the first one and then their performance drops.
Also: why do you think the number of people who take the time to fill one CAPTCHA will be equal to the number of people willing to fill 4? I have a strong suspicion it would drop.
Have you seen ReCaptcha: http://recaptcha.net/learnmore.html
They’re using 2 captchas and turning the cpu power of the ‘evil machines’ to their own ends. Currently that consists of digitising books from the Internet Archive.
The CHS paper is the right reference…don’t their results already give what you want?
Why do you think that the human error will be the same for the 4 CAPTCHAs? Maybe humans gets tired after filling the first one and then their performance drops.
Also: why do you think the number of people who take the time to fill one CAPTCHA will be equal to the number of people willing to fill 4? I have a strong suspicion it would drop.