1. Karlsruhe Institute of Technology, Institute of Human and Industrial Engineering , Engler-Bunte-Ring 4, 76131 Karlsruhe , Germany
2. Karlsruhe Institute of Technology, Institute for Anthropomatics and Robotics, High Performance Humanoid Technologies , Adenauerring 12, 76131 Karlsruhe , Germany
3. Karlsruhe Institute of Technology, Institute of Industrial Information Technology , Hertzstraße 16, 76187 Karlsruhe , Germany
4. Karlsruhe Institute of Technology, Institute for Anthropomatics and Robotics, Computer Vision for Human-Computer Interaction Lab , Adenauerring 10 , 76131 Karlsruhe , Germany
5. University of Stuttgart, Institute for Artificial Intelligence , Universitätsstraße 32, 70569 Stuttgart , Germany
6. Karlsruhe Institute of Technology, Institute for Anthropomatics and Robotics, Autonomous Learning Robots Lab , Engler-Bunte-Ring 8, 76131 Karlsruhe , Germany