Detecting Invisible Motion

This project will look at MIT research at the intersection of vision and graphics who created an algorithm that offers its users a new way of looking at the world. The technique which uses an algorithm that can amplify both movement and colour, can be used to monitor everything from breathing in a sleeping infant, to the pulse in a hospital patient. Its creators, led by computer scientist William Freeman, call it "Eulerian Video Magnification"

They've posted the source code online. It's free to use for non-commercial purposes.