Another subtlety - it should be easy for humans to read, but not amenable to machine recognition. You can easily take a character set and get captcha from it, but not vice versa. Mostly captcha is an example of one-way conversion. I have no goal of creating a universal captcha recognizer, but only to show how this is done.
Python: PIL: Install them in the above order and you are ready to run the examples.Īlso, in the examples I will rigidly set many values directly in the code. It should also work in Python 2.6 and it was successfully tested in Python 2.7.3.
Thats why in this particular article I will show how to crack text captchas using OCR method, as well as how to bypass complex Google ReCaptcha v2 with the help of real people.Īll examples are written in Python 2.5 using the PIL library. While this struggle between captcha makers and captcha solvers seems like endless, different people are interested in automatic captcha solution in order to maintain work of their software. Then comes ReCaptcha v2 which is way more complicated, but still it can be bypassed in automatic mode.
But on practice this usually does not work, because almost every simple text captcha posted on the site gets cracked after less then several months.
Learn Data Science by completing interactive coding challenges and watching videos by expert instructors.Īs everyone knows, captchas are those annoying things like "Enter the letters that you see on the image" on the registration or feedback pages.ĬAPTCHA is designed so that a human could read the text without difficulty, while a machine can not. You are receiving this because you were mentioned.(Sponsors) Get started learning Python with DataCamp's
On Fri, at 10:14 AM rlsblogse commented on this gist.