article : https://nakedsecurity.sophos.com/2016/04/08/solving-google-recaptchas-without-using-humans/
source : source - https://www.blackhat.com/docs/asia-16/materials/asia-16-Sivakorn-Im-Not-a-Human-Breaking-the-Google-reCAPTCHA-wp.pdf
origin - http://www.pipiscrew.com/?p=4835 solving-google-recaptcha