Our purpose is to explore a family of specific dynamical methods that support the contrasting goals of presence and independence in collaborative virtual environments. We pose for ourselves the basic tasks of “tethering” — keeping a collaborator close to a group or leader, and of “reattachment” — returning to a collaborative virtual activity after a period of independent exploration. We first p...

OBJECTIVE We examined motion sickness in an oscillating virtual environment presented via a video projector system. BACKGROUND Visible oscillation of the physical environment is known to induce both postural instability and motion sickness, but it cannot be assumed that the same phenomena will occur in a virtual simulation of such motion. METHOD Standing participants (3 men and 9 women, 20-...

Motion capture (mocap) provides highly precise data of human movement which can be used for empirical analysis and virtual human animation. In this paper, we describe a corpus that has been collected for the purpose of modelling movement in a dyadic conversational context. We describe the technical setup, scenarios and challenges involved in capturing the corpus, and present ways of annotating ...

Virtual Reality or Virtual Realities (VR), which can be referred to as immersive multimedia or computer-simulated realities, replicates an environment that simulates physical presence in places in the real world or imagined worlds and lets the user interact in that world. Virtual realities artificially create sensory experiences, which can include sight, hearing, touch, and smell (concept cited...

Computer Assisted Rehabilitation Environment (CAREN) is a system that integrates a training platform (motion base), a virtual environment, a sensor system (motion capture) and D-flow software. It is useful for both diagnostic and therapeutic use. The human gait pattern can be impaired due to disease, trauma or natural decline. Gait analysis is a useful tool to identify impaired gait patterns. T...

Virtual humans are employed in many interactive applications, including (serious) games. Their motion should be natural and allow interaction with its surroundings and other (virtual) humans in real time. Physical controllers offer physical realism and (physical) interaction with the environment. Because they typically act on a selected set of joints, it is hard to evaluate their naturalness in...

Computer Assisted Rehabilitation Environment (CAREN) is a system that integrates a training platform (motion base), a virtual environment, a sensor system (motion capture) and D-flow software. It is useful for both diagnostic and therapeutic use. The human gait pattern can be impaired due to disease, trauma or natural decline. Gait analysis is a useful tool to identify impaired gait patterns. T...

A number of promising applications have renewed researchers’ interest in the analysis of human movements. In general, motion capture could play an important role in many areas that require storing, analyzing, or reproducing the motion of human beings. Current motion capture techniques are based on intrusive sensory systems, which might be disturbing or impossible to apply in several application...