単一RGBカメラによる歩行の時空間指標と両下肢角度の簡易計測

抄録

A single-camera based gait analysis system without markers, large space, and preparation can provide useful information for determining effective treatment in clinical sites. However, little is known about the effectiveness in gait analysis. This study investigated the accuracy of single-camera(the right side located) based pose estimation system using OpenPose (OP) measuring the lower limb joint angle and spatio-temporal parameters in both lower limbs during the normal gait and large foot progression angle (FPA) gait. Nine healthy adult males walked under two different foot progression angle FPA conditions (normal and large FPA). To validate the accuracy of the system in both conditions, Mean Absolute error (MAE) and Mean Absolute Percentage Error (MAPE) was calculated. Although the MAE of ankle joint angle is larger than 10 degrees and an additional device is necessary to evaluate for the large FPA gait, the MAE of all joint angle in normal conditions and MAPE of spatio-temporal parameters in both conditions are acceptable.