CAPTCHA Generator

This code generates and saves a set of CAPTCHAs as PNG files in base64 format, using a convolutional neural network (CNN) trained on the MNIST dataset.

Requirements

1. Python
2. TensorFlow
3. NumPy

Usage

To generate and save the CAPTCHAs, run the following command:

python generate_captchas.py

*This will generate and save num_captchas CAPTCHAs as PNG files in base64 format, where num_captchas is a parameter that can be adjusted in the code. The CAPTCHAs and their corresponding answers will be saved in the captchas and captcha_answers lists, respectively.

Output

The output of the code will be a set of num_captchas PNG images saved in base64 format, along with the corresponding answers in the captcha_answers list. Notes

The CNN is trained on the MNIST dataset for 10 epochs, and the
trained model is used to generate the CAPTCHAs. The CAPTCHAs are
generated by randomly sampling 28x28 grayscale images from a uniform
distribution between 0 and 9. The base64 strings can be decoded and
saved as PNG files using the base64 module in Python.