7.1 Introduction
A pirouette is a familiar step in ballet. There are many types of pirouettes. We will focus on an en dehors (outside) pirouette from fourth position. The dancer pliés (does a deep knee bend) then straightens her legs producing both an upward force to get on the tip of her pointe shoe and a torque to turn about her axis of revolution.
In this chapter, we will classify pirouettes. Four dancers will each do ten double pirouettes, and we will use them to train the deep learning network. The network ...