Abstract: A system includes an inertial measurement unit (IMU) associated with a user, wherein the IMU acquires acceleration data and determines gravity data during a period of time, wherein the IMU acquires magnetic orientation data and heading data during the period of time, and wherein the IMU outputs gravity data and heading data to a processing unit, a camera for acquiring images of the user including the IMU during the period of time, and the processing unit for determining an orientation of a portion of a model of the user in response to the images of the user, for determining calibration data for the portion of the model of the user in response to the orientation of the portion of the model, the gravity data, and the heading data.

Abstract: A system includes an inertial measurement unit (IMU) associated with a user, wherein the IMU acquires acceleration data and determines gravity data during a period of time, wherein the IMU acquires magnetic orientation data and heading data during the period of time, and wherein the IMU outputs gravity data and heading data to a processing unit, a camera for acquiring images of the user including the IMU during the period of time, and the processing unit for determining an orientation of a portion of a model of the user in response to the images of the user, for determining calibration data for the portion of the model of the user in response to the orientation of the portion of the model, the gravity data, and the heading data.

Abstract: A system includes a first and second sensor for a first and second body portion, wherein each sensor includes perturbation sensors for determining physical perturbations for each respective body portion in response to a body movement, each sensor includes a processor for determining orientation and velocity data for each respective body portion in response to the physical perturbations, a shape sensing unit coupled to a joint portion between the first and second body portions including an optical fiber configured to bend in response to the body movement, a light source for providing light into the optical fiber, a light sensor for sensing reflected light from the optical fiber in response to being bent, and a processor for determining curvature data associated with the joint portion, and a central processor for determining user movement data in response to the orientation and velocity data for each body portion and the curvature data.