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TECHNOLOGIES FOR MOTOR BEHAVIOUR ANALYSIS AND VIRTUAL MODELLING June 25, 2020 Written Test. Max points 165 (equivalent to 33/30). Min points 90/165 (equivalent to 18/30). Duration 90 minutes QUESTION 1 [5/165] Consider EMG measurements collected with respect to the time as given in the picture. Identify which type of noise is observed for the identified peaks with red arrows. • Muscle activation • Baseline drift • Power supply interference • ECG artifacts • Movement artifacts QUESTION 2 [5/165] Consider intrinsic and extrinsic camera calibration problem. In the case we consider for the intrinsics only two focal lengths for x and y-axis and principal point, how many DoF are required to be found by calibration? • 4 • 10 • 9 • 11 • 3 Motivate your answer. QUESTION 3 [5/165] It is required to design a force plate to measure the center of pressure of a patient standing on it by using load cells. Each load cell can measure 3-axes force and 3-axes moment. What is the minimum number of load cells that m ust be used to find the center of pressure on the force plate? • 9 • 6 • 2 • 4 • 3 • 5 Motivate your answer. QUESTION 4 [10/165] Considering the image provided by a camera select the correct calibration matrix (M). • None of the above • A • B • C • D Motivate your answer. QUESTION 5 [5/165] Consider the Global and IMU's reference frames in figure and select the right components of the rotation matrix. • 𝑅1 = [1 0 0]; 𝑅2 = [0 1 0]; 𝑅3 = [0 0 1] • 𝑅1 = [0 1 0]; 𝑅2 = [1 0 0]; 𝑅3 = [0 0 −1] • 𝑅1 = [0 −1 0]; 𝑅2 = [1 0 0]; 𝑅3 = [0 0 1] • 𝑅1 = [1 0 0]; 𝑅2 = [0 −1 0]; 𝑅3 = [0 0 1] • 𝑅1 = [−1 0 0]; 𝑅2 = [0 1 0]; 𝑅3 = [0 0 1] QUESTION 6 [10/165] It is required to calibrate a system for 3D reconstruction with 2 known points (KP) and 5 unknown points (UP). What is the minimum number of…