Convolutional Neural Network for Solving 'Really Simple Captcha'

A deep learning based approach to solve captchas provided by a popular wordpress plugin called Really Simple Captcha which is used by nearly 1 million websites.

Development

Generating Captchas and Extracting Letters

• For generating captchas we downloaded the source code of Really Simple Captcha, hacked the code a bit and made it generate 100k captchas for training our model.
• Using OpenCV in python, we followed some image pre-processing steps and extracted single letters from the generated captcha set and sorted the letters into folders of each letter.

Training the Model

• Develeoped and trained a Deep Convolutional Neural Net using Keras.

This project was inspired by a Medium Article

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