**Author details**

Yoshifumi Nishida\* and Koji Kitamura Artificial Intelligence Research Center, National Institute of Advanced Industrial Science and Technology, Tokyo, Japan

\*Address all correspondence to: y.nishida@aist.go.jp

© 2019 The Author(s). Licensee IntechOpen. This chapter is distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/ by/3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
