Face Tracking and Virtual Reality

I'm searching for a face tracking system to use in an augmented reality project. I'm trying to find an open source and multi-platform application for it. The goal is to return the direction where the face is looking to interact with the virtual environment, (something like this video).

I've downloaded the sources of the above Johnny Lee's application and tried to use Free Track too, making my own headset (some kind of monster, hehe). But it's not good to be limited to infrared points in your head.

These days I've download FaceTrackNoIR, but wh开发者_如何学JAVAen I launch the program I get "No DLL was found in the Waterfall procedure." that I'm actually trying to solve.

Anyone knows a good application, library, code, lecture, anything that could help me to find a good path for this?

Thank you all!

I'll try to post results someday :-)

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I would take a look at OpenCV. It is a general purpose machine-learning and computer vision C++ library. One of the examples in the download is a real-time face tracker that connects to a video camera connected to your computer and draws squares around any faces in the camera view.