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In the rehabilitation field, assessing the performance of limb functions is of importance in evaluating other medical procedures [219]. This task can be relatively easy to achieve in clinical environments. However, when it comes to telerehabilitation, it becomes difficult due to the absence of well‐trained clinicians in the majority of cases. From the literature, it is found that a number of features have been used to perform automated assessment. However, the majority of them are calculated from a dynamic aspect of movements, such as velocity, acceleration and jerk. Therefore, a challenge here is whether it is possible to derive features for kinematic movement assessment based on shape information from motion trajectories. A novel approach to evaluate patients' kinematic performance by investigating both the shape and dynamics of the motion trajectories will be discussed in Chapter 2.