Patent DE849488C successfully refreshed from Google Patents.
EP0451875A2
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EP
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Image displaying system
Assignee: Panasonic Holdings Corp
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Filing: 1991-04-15
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Granted: —
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Expires: 2011-04-15
Abstract
Abstract An image displaying system for interactively changing the positions of the view vector and the viewpoint in the 3-dimensional space of a camera model which makes visual, an object geometric model constructed within a computer, on the screen in a computer assisting design (CAD) and a science art simulation field. The user inputs the object point and the target point on the display screen showing the viewpoint and the view vector direction so as to effect the screen display of the scene with the positions of the view vector and the viewpoint in the 3-dimensional space of the camera model for making visible on the screen the object geometric model constructed within the computer. The scene with the viewpoint and the view vector direction being interactively changed is displayed on the screen.
Inventors
- 👤 Kazu Horiuchi
- 👤 Kenji Nishimura
- 👤 Yoshimori Nakase
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-05 09:37
CPC Classifications
G; G06; G06T; G06T15/00; G06T15/10; G06T15/20
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
126 words
An image displaying system comprising a view vector memory portion for maintaining the view vector information in the 3-dimensional space, a geometric data storing portion for maintaining the geometric data of the display objects, a screen position inputting portion for interactively inputting the object point which is a 2-dimensional position on the display screen corresponding to the new viewpoint, a viewpoint position computing portion which computes the intersection of geometric data read from the geometric data storing portion with the ray originating at the existing viewpoint read from the view vector memory portion and passing through the object point inputted from the screen position inputting portion, so as to store the intersection in the view vector memory portion as the 3-dimensional position of the new viewpoint.
Claim 2
Dependent Claim
145 words
An image displaying system comprising a view vector memory portion for maintaining the view vector information in the 3-dimensional space, a screen position inputting portion for interactively inputting the target point which is a 2-dimensional position on the display screen indicating the new view vector direction, a view vector direction computing portion which computes the 3-dimensional angle data indicating the new view vector direction from the existing screen base position on the display screen indicating the existing view vector direction, the target point inputted from the screen position inputting portion, the 3-dimensional position of the viewpoint read from the view vector memory portion, and the 3-dimensional angle data indicating the existing view vector read from the view vector memory portion, so as to store the 3-dimensional angle data indicating the new view vector in the view vector memory portion as the new screen base position.
Claim 3
Dependent Claim
246 words
An image displaying system comprising a view vector memory portion for maintaining the view vector information in the 3-dimensional space, a geometric data storing portion for maintaining the geometric data of the display subject objects, a screen position inputting portion for interactively inputting the object point which is a 2-dimensional position on the display screen corresponding to the new viewpoint, and the target point which is a 2-dimensional position on the display screen indicating the new view vector direction, a viewpoint position computing portion which computes the intersection of geometric data read from the geometric data storing portion with the ray originating at the existing viewpoint read from the view vector memory portion and passing through the object point inputted from the screen position inputting portion so as to store the intersection in the view vector memory portion as the 3-dimensional position of the new viewpoint, a view vector direction computing portion which computes the the 3-dimensional angle data indicating the new view vector direction from the existing screen base position on the display screen indicating the existing view vector direction, the target point inputted from the screen position inputting portion, the 3-dimensional position of the viewpoint read from the view vector memory portion, and the 3-dimensional angle data indicating the existing view vector read from the view vector memory portion, so as to store the 3-dimensional angle data indicating the new view vector in the view vector memory portion as the new screen base position.
Claim 4
Dependent Claim
229 words
An image displaying system comprising a view vector memory portion for maintaining the view vector information in the 3-dimensional space, a geometric data storing portion for maintaining the geometric data of the display subject objects, an interpolated position computing portion which produces the 2-dimensional sample target points by sampling the curve interpolated from the points inputted from the screen position inputting portion, a viewpoint position computing portion which computes the intersection of geometric data read from the geometric data storing portion with the ray originating at the existing viewpoint read from the view vector memory portion and passing through the object point inputted from the screen position inputting portion so as to store the intersection in the view vector memory portion as the 3-dimensional position of the new viewpoint, a view vector direction computing portion which computes the 3-dimensional angle data indicating the new view vector direction from the existing screen base position on the display screen indicating the existing view vector direction, the sample target point produced by the interpolated position computing portion, the 3-dimensional position of the viewpoint read from the view vector memory portion, and the 3-dimensional angle data indicating the existing view vector read from the view vector memory portion, so as to store the 3-dimensional angle data indicating the new view vector in the view vector memory portion as the new screen base position.
References Cited (Backward Citations)
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