Proposal of Emotion Expression Method by Clothes Color for Communication Robot.

In recent years, communication robots are commonly used in various purposes and situations such as guidance services at hotels and stations, elderly support, etc. in Japan. However, it is also shown that people still have a sense of anxiety toward robots. For this reason, there are few people who have motivations to communicate with robots. On the other hand, it has been suggested that the emotion expression of robots contributes to create a sense of familiarity and smooth communication. Therefore, we propose a method of emotion expression and enhancement by changing the color of the clothes the robot is wearing. In this research, we have matched the clothes color with speech emotion for communication robot. As a result of the experiment, we found the matching between the clothes colors and 10 emotions (joy, anger, sorrow, fear, shame, like, dislike, excite, relief and surprise). Moreover, we obtained some problems about the method of changing clothes color according to the progress of the speech. Therefore, additional experiment is performed to solve these problems and to improve the method of changing clothes color. As a result of the additional experiment, we found the method of changing clothes color with reducing the unnaturalness and discomfort.