Beating CAPTCHAs with Neural Networks

You may find the following topics interesting as well:

Better (worse?) CAPTCHAs

URL: http://scikit-image.org/docs/dev/auto_examples/applications/plot_geometric.html

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

Deeper...