My gesture library ported to iOS, running on iPad 2 using the front-facing camera. Added head tracking with OpenCV for Head-Coupled Perspective (HCP).
It's an early prototype for an ongoing project at the NCCA, Bournemouth University.
The system is implemented in C++ and some Objective-C (for iOS glue code), powered by openFrameworks. The values will have to be filtered to reduce the "jumping" that still occurs sometimes. Stay tuned!
See aaweb.ch for more information about the gesture library.
UPDATE: Also check out the newer video: vimeo.com/22701406