You may find the following topics interesting as well:
Beating CAPTCHAs with Neural Networks
Better (worse?) CAPTCHAs
Larger exercise!
The CAPTCHAs we beat in this example were not as complex as those normally used today. You can create more complex variants using a number of techniques as follows:
- Applying different transformations such as the ones in scikit-image (see the preceding link)
- Using different colors and colors that don't translate well to grayscale
- Adding lines or other shapes to the image: http://scikit-image.org/docs/dev/api/skimage.draw.html
