1. Machine Perception and Intelligent Robotics group (MAPIR), Dept. of System Engineering and Automation, Biomedical Research Institute of Malaga (IBIMA), University of Malaga, Spain and Johann Bernoulli Institute of Mathematics and Computing Science, University of Groningen, The Netherlands
2. Machine Perception and Intelligent Robotics group (MAPIR), Dept. of System Engineering and Automation, Biomedical Research Institute of Malaga (IBIMA), University of Malaga, Spain
3. Johann Bernoulli Institute of Mathematics and Computing Science, University of Groningen, The Netherlands