Human Motion Capture and Identification for Assistive Systems Design in Rehabilitation. Pubudu N. Pathirana

Human Motion Capture and Identification for Assistive Systems Design in Rehabilitation - Pubudu N. Pathirana


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Accessed: 2015-05-22.

Version 1 [322] Version 2 [4]
Viewing angle (vertical) 43° 70°
Viewing angle (horizontal) 57° 60°
Vertical tilt range ±28° no
Frame rate (frame per second) 30 30
Depth resolution (pixels) 320 × 240 512 × 424
Colour stream resolution (pixels) 640 × 480 1920 × 1080
Skeleton Schematic illustration of Version 1[322]. [6] Schematic illustration of Version 2[4]. [3]
Number of tracking subjects 6 (can only display 2) 6 (can display 6)
Sensing principle
Photograph of (a) Software interface developed and used to measure the angle of knee via the Internet. (b) A therapist monitoring the knee angle measurement remotely through the Internet. Photos depict the physiotherapist monitoring the exercise on his patient remotely through the Internet.

      1.3.3 Inertial measurement unit (IMU)

      Inertial measurement unit (IMU) is a device that mainly measures angular velocity, orientation, gravitational force and magnetic direction. In an early stage of the development of the IMU, a gyroscope and an accelerometer were usually utilised to provide angular velocity and inertial acceleration. Later on, integration of a magnetometer enabled an IMU to measure magnetic direction. As a result, measurements from an IMU can be more accurate [20]. As all these sensors are able to provide three‐dimensional measurements, the IMU is widely utilised in movable applications, such as for aircraft navigation [398].


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