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Solving Audio Captchas

Solving Audio Captchas using Machine Learning

Authors: Sampriti Panda, Duy Nguyen

Requirements

  • python >= 3.6
  • numpy
  • scipy
  • matplotlib
  • python_speech_features: pip install python_speech_features
  • sklearn
  • keras (Not-needed, you can comment out the imports)
  • pip install numba==0.48.0
  • librosa, spectrum: pip install librosa spectrum

Generating Training Data

  • We have provided around 50 train and 10 test cases per category, but you need to generate around 1000 train data to replicate our results.
  • To generate data using our scripts, please cd into the training_data/ directory and run: ./gen_data.sh.
  • You can also download pre-generated training data from: https://drive.google.com/file/d/19ypbdOiafc3Ocr9ltHIFjJI9uQXlEuJR/view?usp=sharing
  • poc.py contains our original algorithm, which gives around 70% accuracy on digits and 50% on letters.
  • poc2.py contains our improved algorithm, which gives around 95% accuracy.
  • To run either of these implementations, modify the DIR_TRAIN and DIR_TEST directories to the necessary locations, and run python poc.py.