Nice piece of research for 3D social interaction capture and analysis in:
Hanbyul Joo, Tomas Simon, Xulong Li, Hao Liu, Lei Tan, Lin Gui, Sean Banerjee, Timothy Scott Godisart, Bart Nabbe, Iain Matthews, Takeo Kanade, Shohei Nobuhara, Yaser A Sheikh, "Panoptic Studio: A Massively Multiview System for Social Interaction Capture", IEEE Transactions on Pattern Analysis and Machine Intelligence (PAMI), 2018 (DOI: 10.1109/TPAMI.2017.2782743).
Link HERE.
Please, have a look at Figure 2.
