Bird's-eye view forming method, map display apparatus and naviga

Details Bird's-eye view forming method, map display apparatus and naviga Bird's-eye view forming method, map display apparatus and naviga

1996-04-17

2000-10-31

Powell, Mark R.

Computer graphics processing and selective visual display system

Computer graphics processing

Three-dimension

G06T 1160

Patent

active

061410144

ABSTRACT:
A map display apparatus for displaying perspective image of a map. The apparatus includes an image display device for displaying the perspective image of the map and a map data storage device for storing map data. Map drawing means is included for preparing map drawing data using the map data and for displaying a perspective image of the map on the display device on the basis of the drawing data. The map drawing means transforms coordinate data of a map into data suitable for display of the perspective image of the map. The data transformation is accomplished by perspectively projecting the coordinate data onto a predetermined projection plane with a view point at a desired position. The projection plane is determined on the basis of two predetermined points in the map data, such as the current position of a vehicle and the destination, so that drawing positions of the two points after the perspectively projecting operation are coincident with predetermined positions.

REFERENCES:
patent: 4940972 (1990-07-01), Mouchot et al.
patent: 4952922 (1990-08-01), Griffin et al.
patent: 5088054 (1992-02-01), Paris, II
patent: 5161886 (1992-11-01), De Jong et al.
patent: 5448696 (1995-09-01), Shimada et al.

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