Quantification of Motion Gracefulness Focused on Knees and Hips

One of the adjectives used to describe human behavior is gracefulness. Graceful motion can make a good impression on people. We have proposed an evaluation formula for gracefulness by focusing on “Graceful motion” defined by William Hogarth and analyzing the arm's trajectory. However, this evaluation formula cannot apply to whole-body motion. Therefore, in this report, in addition to evaluating the trajectory of the hand, we analyzed the periodicity and frequency components of movements focusing on the parts of the body other than the arm. We evaluated the results of these analyses with the impressions of gracefulness obtained from a questionnaire survey.