This study makes a body model for education of dance how lively a dance trainer moves his/her body so that the dance student can learn dance from the dance trainer who is in the distant place through communication line in virtual dance studio. In late years, network game gives the virtual space enjoying sports, music, and dance to plural people who are in the remote place at the same time. However, the general network game has to attach sensors or devices to the body of the players to input livingness by the movement of them. Therefore, not only they feel botheration in the player attaching sensors or devices, but also it is necessary to spend labor and time to attach sensors or devices to the body. This study proposes Active Quantity to measure with quantity from 0.0 to 1.0 from a dynamic image which photographed the movement of the dance trainer in digital video camera. Furthermore, the proposal method makes the body model that put the silhouette of the dance trainer and Active Quantity together so that the dance students are easy to understand the movement of the dance trainer from sight.
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