Using computer vision and collision detection techniques Freepad further explores the development of mixed-reality interfaces for music. The result is an accessible user-definable MIDI interface for anyone with a webcam, pen and paper, which outputs MIDI notes with a velocity value based on the speed of the strike.
See the slide presentation in Freepad Presentation.
Chun, S., Hawryshkewich, A., Jung, K. & Pasquier, P. (2010). “Freepad: A Custom Paper-Based MIDI Interface” New Interfaces of Musical Expression (NIME), Sydney, Australia.