Offline captcha recognition, is there a ready-made library?

Question

PHP

I came across all sorts of programs like qoo.by/qCD that recognize captcha foul.
I am looking for a ready-made development that will be able to recognize a simple captcha without any anti-gate and anti-captcha.
To dig into the source codes and modify.

Answer 1

Have a look at Tesseract.js

Answer 2

I am not familiar with ready-made libraries (they have not been required in practice yet), although I know a library, albeit not specifically designed for captcha recognition, but which will help to do this easily.
https://habrahabr.ru/post/158729/
For a simple captcha, I think in a couple of hours you can figure it out, write a script, train the network.
For general educational purposes)
https://habrahabr.ru/post/116222/