This paper presents our eeorts to accurately track a Head-Mounted Display (HMD) in a large environment. We review our current benchtop prototype (introduced in WCF90]), then describe our plans for building the full-scale system. Both systems use an inside-out optical tracking scheme, where lateral-eeect photodiodes mounted on the user's helmet view ashing infrared beacons placed in the environm...

Virtual environments (VEs) offer huge potential for a wide range of applications including the transfer of spatial knowledge from virtual spaces to real world places; beneficial in situations where it would be impractical, too expensive or dangerous, to acquire that knowledge from the real environment. Research has shown that people can acquire near perfect spatial knowledge about real world en...

The viewers of three-dimensional (3D) movies often complain of blurring and bleeding. They sometimes experience visually induced motion sickness (VIMS). In this study, the effect of VIMS on body sway was examined using stabilograms. We measured the sway in the center of gravity before and during the exposure to images projected on a head-mounted display (HMD). While viewing, the subjects were i...

We have developed a mobile vision assistive device based on a head mounted display (HMD) with a video camera, which provides image magnification and contrast enhancement for patients with central field loss (CFL). Because the exposure level of the video camera is usually adjusted according to the overall luminance of the scene, the contrast of sub-images (to be magnified) may be low. We found t...

This paper describes a hybrid optical system using a combination of glass and polymer optics, including aspheric surfaces, in a Wide FOV Head Mounted Display (HMD) for Simulation and Visualisation.

In our everyday lives, bits of important information are lost due to the fact that our brain fails to convert a large portion of short term memory into long term memory. In this paper, we propose a framework that uses an eyetracking interface to store pieces of forgotten information and present them back to the user later with an integrated head mounted display (HMD). This process occurs in thr...

A robotic manipulator has been mounted to an electric wheelchair to assist people with disabilities. Particular emphasis has been given to the constraints and requirements for wheelchair mounting.

This tutorial summarizes the design of head mounted displays. The HMD design is inherently an interdisciplinary subject fusing optical engineering, optical materials, manufacturing techniques, user interface design, computer science, human perception, and physiology for assessing the displays. The report focuses on the optical designs, human factors of HMD. Currently there are two types of micr...

Stereoscopic head-mounted displays (HMD's) provide an effective capability to create dynamic virtual environments. For a user of such environments, virtual objects would be displayed ideally at the appropriate distances, and natural concordant accommodation and convergence would be provided. Under such image display conditions, the user perceives these objects as if they were objects in a real ...