Display techniques for three dimensional virtual reality

Details Display techniques for three dimensional virtual reality Display techniques for three dimensional virtual reality

1997-08-04

2001-11-27

Zimmerman, Mark (Department: 2671)

Computer graphics processing and selective visual display system

Computer graphics processing

Adjusting level of detail

C345S420000, C345S619000, C345S630000, C345S473000

Reexamination Certificate

active

06323861

ABSTRACT:

TECHNICAL FIELD
This invention relates to the integration of computer graphics and video to provide a realistic three dimensional virtual reality experience.
BACKGROUND OF THE INVENTION
The display of a three dimensional world to a viewer requires considerable computation power, and it is typically costly to develop the necessary highly detailed models required for doing so. In order to simplify the problem, a portion of the world that is in the distance may be represented in only two dimensions as a video displayed on a surface, e.g., a screen. By video it is meant the common usage of the term, such as the placing or projecting of predefined images on the surface, e.g., the electronic version of filmed moving pictures. Thus, such a world is essentially truncated in length to the screen on which the video is displayed. A great reduction in computation power and cost can be achieved by such an arrangement.
SUMMARY OF THE INVENTION
A limitation of such a world occurs when a computer graphic object represented by computer graphics, e.g., in front of, to the side of, above, or below the video screen, undergoes a trajectory that takes it to a location in the world that is not represented as computer graphics, but instead is within the field represented by the video. We have recognized that, in accordance with the principles of the invention, when a computer graphic object undergoes a trajectory that takes it to a location in the world that is not represented as computer graphics, but instead is within the field represented by the video, such an object should be represented as video on the screen, rather than computer graphics. Thus, the computer graphics object “goes into the video” as video and remains visible to a viewer in front of the video screen, rather than becoming invisible because it is blocked from view by the video screen if it were to be generated at its proper location using computer graphic techniques.


REFERENCES:
patent: 5261041 (1993-11-01), Susman

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