My bet is that Dr. Thad Starner's dataset is backing this: https://sites.cc.gatech.edu/home/thad/031_research.htm https://sites.cc.gatech.edu/home/thad/031_res

My bet is that Dr. Thad Starner's dataset is backing this: https://sites.cc.gatech.edu/home/thad/031_research.htm https://sites.cc.gatech.edu/home/thad/031_research.htm https://www.popsign.org/ https://www.popsign.org/ is one of his projects and he has worked with them before on google glass.