Fig. 3
From: Learning based lower limb joint kinematic estimation using open source IMU data

(a) Average RMSE values for joint angles estimated by each method compared to OpenSim inverse kinematics of the OMC data. (b) Average NRMSE values for joint angles estimated by each method compared to OpenSim inverse kinematics of the OMC data. (c) Average Pearson correlation coefficients for joint angles estimated by each method compared to OpenSim inverse kinematics of the OMC data. Error bars represent ± 1 standard deviation. Asterisks indicate statistical significance (p < 0.05).