In this paper, we present a vision based relative tracking for use in hand-held virtual reality systems. Hand-held virtual reality system refers a virtual reality system that is self contained with a computer and multimodal sensors (e.g. 3D tracking, voice recognition, motion sensing, etc.) and feedback (e.g. graphic, sound, and tactile display) all hold-able in one hand. Relative tracking refe...

Different realistic humanoid motion can be used in vary situations in animation. It also plays an important role in virtual reality. In this paper, we propose a novel method to generate different realistic humanoid motion automatically. Firstly, eigenvectors of a motion sequence is computed using principle component analysis. The principle components are served as “virtual joints” in our system...

We share the results of a preliminary experiment where participants performed a simple task in a control immersive virtual environment (IVE) followed by a stressful IVE. Participants’ gaits were recorded with a motion capture system. We computed speed, stride length, and stride width for each participant and found that participants take significantly shorter strides in the stressful environment...

background: the purpose of the present study was to examine the reliability of scapular kinematic measurements using motion analysis system in subjects with and without general hypermobility syndrome. methods: a methodological study was designed to assess the reliability of scapular movement measurement in two groups of females with and without general hypermobility syndrome. upward rotation, s...

Motion capture is used in video games and computer animated films to create realistic animations of moving virtual characters. In games and films, an actor’s motion is captured offline, saved, and finally replayed to animate a virtual character. The same principles can be applied to Virtual Reality (VR), but the motion capture must be done in real-time so when a user moves, her corresponding vi...

A new interface for visualizing and analyzing percussion gestures is presented, proposing enhancements of existing motion capture analysis tools. This is achieved by offering a percussion gesture analysis protocol using motion capture. A virtual character dynamic model is then designed in order to take advantage of gesture characteristics, yielding to improve gesture analysis with visualization...

A common issue in three-dimensional animation is the creation of contacts between a virtual creature and the environment. Contacts allow force exertion, which produces motion. This paper addresses the problem of computing contact configurations allowing to perform motion tasks such as getting up from a sofa, pushing an object or climbing. We propose a two-step method to generate contact configu...

This paper outlines a method of estimating the 3D pose of the upper human body from a single uncalibrated camera. The objective application lies in 3D Human Computer Interaction where hand depth information offers extended functionality when interacting with a 3D virtual environment, but it is equally suitable to animation and motion capture. A database of 3D body configurations is built from a...

This contribution describes a Virtual Reality (VR) based method for character animation that extends conventional motion capture by not only tracking an actor’s movements but also his or her interactions with the objects of a virtual environment. Rather than merely replaying the actor’s movements, the idea is that virtual characters learn to imitate the actor’s goal-directed behavior while inte...

In this paper a multi-user motion capture system is presented, where users work from separate locations and interact in a common virtual environment. The system functions well on low-end personal computers; it implements a natural human/machine interaction due to the complete absence of markers and weak constraints on users’ clothes and environment lighting. It is suitable for every-day use, wh...