Abstract: A calibration fixture provides a repeatably accurate tool for measuring offset angles between measurement axes for inertial measurement units (IMUs) used in motion capture. The measured offset angles may be used to correct angles measured by the IMUs to create a biomechanical skeleton that accurately represents movements of a motion capture subject. The disclosed embodiments are applied segments of a biomechanical skeleton providing a mathematical model of a human arm and hand.

Abstract: A calibration fixture provides a repeatably accurate tool for measuring offset angles between measurement axes for inertial measurement units (IMUs) used in motion capture. The measured offset angles may be used to correct angles measured by the IMUs to create a biomechanical skeleton that accurately represents movements of a motion capture subject. The disclosed embodiments are applied segments of a biomechanical skeleton providing a mathematical model of a human arm and hand.

Abstract: A method for controlling aspects of an artistic performance with a motion capture system includes modeling movements of a performer with a biomechanical skeleton, selecting parent and child segments on the biomechanical skeleton, positioning motion capture sensors on a motion capture subject at positions corresponding to the parent and child segments, selecting actions associated with movements of the child segment according to positions of the parent segment within at least two predefined spatial zones, executing actions in a first action group for the child segment when the parent segment is in a first spatial zone, and executing actions in a second action group for the child segment when the parent segment is in a second spatial zone.

Abstract: A method for controlling aspects of an artistic performance with a motion capture system includes modeling movements of a performer with a biomechanical skeleton, selecting parent and child segments on the biomechanical skeleton, positioning motion capture sensors on a motion capture subject at positions corresponding to the parent and child segments, selecting actions associated with movements of the child segment according to positions of the parent segment within at least two predefined spatial zones, executing actions in a first action group for the child segment when the parent segment is in a first spatial zone, and executing actions in a second action group for the child segment when the parent segment is in a second spatial zone.

Abstract: An example posture monitor embodiment includes a first angle sensor coupled to an upper plate and a second angle sensor coupled to a lower plate rotatably connected to the upper plate. The posture monitor may be coupled to a persons chest and to the persons abdomen below the waist to measure an angle related to the persons posture. The posture monitor may activate an alarm indicator when the measured angle changes by more than a preferred threshold value, indicating a change in the persons posture.

Abstract: An example posture monitor embodiment includes a first angle sensor coupled to an upper plate and a second angle sensor coupled to a lower plate rotatably connected to the upper plate. The posture monitor may be coupled to a persons chest and to the persons abdomen below the waist to measure an angle related to the persons posture. The posture monitor may activate an alarm indicator when the measured angle changes by more than a preferred threshold value, indicating a change in the persons posture.

Abstract: A calibration fixture provides a repeatably accurate tool for measuring offset angles between measurement axes for inertial measurement units (IMUs) used in motion capture. The measured offset angles may be used to correct angles measured by the IMUs to create a biomechanical skeleton that accurately represents movements of a motion capture subject. The disclosed embodiments are applied segments of a biomechanical skeleton providing a mathematical model of a human arm and hand.

Abstract: An example posture monitor embodiment includes a first angle sensor coupled to an upper plate and a second angle sensor coupled to a lower plate rotatably connected to the upper plate. The posture monitor may be coupled to a person's chest and to the person's abdomen below the waist to measure an angle related to the person's posture. The posture monitor may activate an alarm indicator when the measured angle changes by more than a preferred threshold value, indicating a change in the person's posture.

Abstract: A motion capture apparatus includes a base unit and a motion capture accessory such as a finger IMU assembly and/or a joystick. The base unit includes an inertial measurement unit (IMU), a microprocessor in data communication with the IMU, and a plurality of IMU connectors connected to the microprocessor. The base unit further includes a communications module adapted for wired communications, a transceiver for wireless communications, and an accessory connector receptacle for mechanical connection of the motion capture accessory. The finger IMU assembly includes a housing base and a housing cap, an IMU in a void formed between the base and cap, and a flexible cable assembly electrically connected to the IMU in the finger housing assembly. The cable assembly slidably engages the housing base and includes a connector plug adapted for connection to any one of the plurality of IMU connectors on the base unit.

Abstract: Embodiments form a calibrated biomechanical skeleton from images including a scale frame and a motion capture subject. Links and joints for the biomechanical skeleton are overlaid on a silhouette created for each image in a sequence of captured images. A true length for each link and an accurate position for each biomechanical reference location are determined from a comparison of true dimensions of the scale frame to measurements taken from recorded camera images. The motion capture subject may perform a sequence of calibration motions to allow joint locations in the biomechanical skeleton to be positioned accurately over corresponding skeletal joints in the motion capture subject. Accurate link lengths for the biomechanical skeleton may be determined by compensating measured link lengths in images with true dimensions of struts and calibration markers included in the scale frame.

Abstract: Images of a moving motion capture subject are captured by exactly one digital camera. Links and joints for a biomechanical skeleton are overlaid on a silhouette for each captured image. A true length for each link and an accurate position for each joint in the biomechanical skeleton may be determined by comparing true dimensions of an image calibration tool to dimensions of the tool measured in images captured by the camera from a single, stationary camera position. The motion capture subject may perform a sequence of calibration motions to allow joint locations in the biomechanical skeleton to be positioned accurately over corresponding skeletal joints in the motion capture subject. Accurate link lengths for the biomechanical skeleton may be determined from images of the image calibration tool. An apparatus embodiment includes an image calibration tool. A method embodiment includes steps for calibrating images with an image calibration tool.

Abstract: The present invention relates to a display booth (1) for displaying a virtual puppet. The display booth (1) comprises a motion tracking system (3) for tracking the movements of an operator in the display booth (1) and a processor (5) is provided for generating the virtual puppet. A keyboard and a separate controller (7) operable by the operator to control the virtual puppet are also provided. The present invention also relates to a method of generating a virtual puppet. Furthermore, the present invention relates to an interactive system for placing an order, such as a food or drinks order. The interactive system comprises one or more virtual puppet display systems.

Abstract: The present invention relates to an exercise monitoring system (3) utilising one or more inertial sensors (25). The present invention also relates to a method of monitoring the performance of a physical activity by an individual (5). The method involves locating one or more inertial sensors (25) on the individual (5) and collecting data from the inertial sensor(s) (25) while the individual performs the physical activity. The collected data is then processed to determine the movements of the individual (5).