Facsimile and static presentation processing – Static presentation processing – Attribute control
Patent
1989-09-11
1990-05-01
Coles, Sr., Edward L.
Facsimile and static presentation processing
Static presentation processing
Attribute control
358 89, 358903, H04N 1304
Patent
active
049223364
ABSTRACT:
A system that is able to display an object in three dimensions and an accompanying method for use therein. Specifically, through this system, a three-dimensional image is displayed as a series of segments, e.g. line segments, formed by intersecting those surfaces of an object that are visible to a viewer with a sequence of pre-defined parallel helical surfaces taken through the object, with substantially the same pitch and axial orientation as that of a rotating helical reflector. Each dot in a resulting segment is then projected through both a focusing lens and an anamorphic lens onto a spatially corresponding portion of the rotating helical reflector. The anamorphic lens, which rotates in unison with the helical reflector, ensures, in conjunction with the focusing lens, that each dot will be focused on a given point along the reflector. By painting each such segment on a different portion of the reflector, the reflector, as it rotates, will sweep out a focused displayed volume. As a result and due to the persistence associated with human vision, a three-dimensional self-radiant "ghost-like" image of the object will appear to be displayed about the central (longitudinal) axis of the reflector. As fewer intersecting segments are painted on each rotation of the reflector, the image will increasingly appear as a "wire-frame" outline of the contours and edges of the object. However, as the number of such segments painted on the reflector increases per each rotation thereof, the three-dimensional image of the object will increasingly appear to "fill in". The displayed image contains appropriate visual information, such as stereoscopic, parallax and focus affects, such that it provides a relatively accurate three-dimensional depiction of the object.
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J. D. Foley et al, Fundamentals of Interactive Computer Graphics, (.COPYRGT.1982, Addison-Wesley Publishing Co.), pp. 505-511.
Arndt Dennis R.
Coles Sr. Edward L.
Eastman Kodak Company
Kostak Victor R.
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