Helsinki University of Technology: Abstract of the Licentiate Thesis

Author: Janne Jalkanen
Title of the Thesis: Building a spatially immersive display - HUTCAVE
Title in Finnish:Keinotodellisuuslaitteiston rakentaminen
Date: 4 March 2000 Number of Pages:132
Department:Department of Computer Science Chair:Telecommunications Software and Multimedia
Supervisor:Prof. Tapio Takala
Instructor:Prof. Tapio Takala

A spatially immersive display is a display that surrounds the user, thus removing or alleviating many disadvantages the common virtual reality systems, such as head-mounted displays have. The most common example of these spatially immersive displays is the CAVE, "CAVE Automatic Virtual Environment", first built at University of Illinois, in 1993. It combines a large field-of-view with high-resolution images and a high frame refresh rate.

In this work, the current Virtual Reality (VR) and Virtual Environment (VE) systems are examined, and then the CAVE construction is presented. Principles of stereo vision are explained and current methods of obtaining both autostereoscopic and stereopsis-based vision are reviewed.

Aspects of different projection methods, screens, mirrors, projectors, tracking equipment, and computing systems are examined. Also, recent work in CAVE audio, so far neglected in research, is presented. Some of the mathematics is also explained, since in most CAVE-systems some sort of optical folding is necessary.

Two cases of CAVE construction are presented, both at the Helsinki University of Technology. The first is a single-wall installation built as a temporary system, and the second is a four-sided CAVE at a new location, superseding the temporary installation.

Finally the conclusions are presented, both from the process management point of view, and from the technical point of view, examining the good and bad points of the chosen solutions.

The full thesis is available here. (PDF, 750 kB)