1 VR/AR Lab, Department of Computer Science, University of Luxembourg, Esch-sur-Alzette, Luxembourg.
2 Information Processing and Communication Laboratory, Computer Science and Networks Department, Telecom Paris, Institut Polytechnique de Paris, Paris, France.
3 Institute of Computer Engineering, University of Lübeck, Lübeck, Germany.
4 Faculty of Business and Information Technology, Ontario Tech University, Oshawa, ON, Canada.
5 Robotics Group, University of León, León, Spain.