Raskar MIT Media Lab 500 Hz Tracking with Inexpensive IR Photosensors, Prakash and Second Skin
Morgan Sutherland

R Raskar, H Nii, B de Decker, Y Hashimoto, J Summet, D Moore, Y Zhao, J Westhues, P Dietz, M Inami, S Nayar, J Barnwell, M Noland, P Bekaert, V Branzoi, E Bruns ACM SIGGRAPH 2007 Paper Imperceptible Photosensing Marker Tags for Location + Orientation + Incident Illumination + Reflectance + Unique Id Capture in Ambient Light at 500Hz, for inexpensive(<$1K) on-set motion capture.