“…Much research has focused on capturing specific body parts. For instance, hand pose is of great importance in VR/AR applications, and has been tracked using e.g., wrist-worn cameras [10,29,62], electrical impedance tomography [67], electromyography [30], depth sensors [16], magnetic trackers [13], and specialized gloves [17]. Faces are important too, most often captured using cameras [4,57], but other methods such as ultrasound [23] and electromyography [18] have also been explored.…”