based on dynamic modeling, robust trajectory tracking control of attitude and position of a spherical mobile robot is proposed. in this paper, the spherical robot is composed of a spherical shell and three independent rotors which act as the inner driver mechanism. owing to rolling without slipping assumption, the robot is subjected to two nonholonomic constraints. the state space representatio...

This paper presents a novel pixelwise representation for visual tracking that models both the spatial structure and dynamics of a target in a unified fashion. The representation is derived from spatiotemporal energy measurements that capture underlying local spacetime orientation structure at multiple scales. For interframe motion estimation, the feature representation is instantiated within a ...

This paper addresses how to determine a sufficient frame (sampling) rate for an optical motion tracking system using passive reflective markers. When using passive markers for the optical motion tracking, avoiding identity confusion between the markers becomes a problem as the speed of motion increases, necessitating a higher frame rate to avoid a failure of the motion tracking caused by marker...

INTRODUCTION Over the recent decades various marker­based video capture systems have been developed in order to estimate segment kinematics in biomechanics applications. It may not be a disproportionate statement to claim that this method is regarded as the gold standard in laboratory based settings. Inherent problems to these systems include adequate marker placement, skin movement artefacts a...

Recent research addresses the question whether motion information of multiple objects contributes to maintaining a selection of objects across a period of motion. Here, we investigate whether target and/or distractor motion information is used during attentive tracking. We asked participants to track four objects and changed either the motion direction of targets, the motion direction of distra...