1. Department of Computer Science and Information Engineering, National Taiwan University of Science and Technology, Taipei City 10607, Taiwan.
2. Industrial Innovation and Robotic Center (IIRC), University of Tabuk, Tabuk 47711, Saudi Arabia.
3. Department of Computer Science, The University of Sheffield, Sheffield S1 4DP, U.K..
4. Visual Analytics for Knowledge Laboratory (VIS2KNOW Lab), Department of Applied Artificial Intelligence, School of Convergence, College of Computing and Informatics, Sungkyunkwan University, Seoul 03063, Republic of Korea