Computer graphics processing and selective visual display system – Computer graphics processing – Graph generating
Patent
1993-08-19
1997-09-09
Powell, Mark R.
Computer graphics processing and selective visual display system
Computer graphics processing
Graph generating
345439, 345441, 345523, G06F 1500
Patent
active
056664761
ABSTRACT:
A three-dimensional image display device comprising a main-image storage device for storing data representative of a main image; a sub-image storage device for storing data representative of a reduced image of the main image; coordinate input device for continuously entering a change in the viewing direction of an image; converting device for converting the output coordinate data of the coordinate input device into angle data representative of the image viewing direction; three-dimensional image calculating device for converting the main image data into three-dimensional image data on the basis of the angle data representative of the image viewing direction; changeover device for normally applying the sub-image data to the three-dimensional calculating device and for applying the main image data to the three-dimensional calculating device; control device for applying the angle data to the three-dimensional image calculating device and for controlling the changeover device; and image display device for displaying the main image and the sub-image on the same screen, whereby the view direction of the sub-image is changed until the desired direction is obtained, and then the main image in that desired direction is displayed. Advantageously, the invention enables selecting a view direction in real time by observing the view direction of the sub-image without the requirement of a dedicated hardware for such purpose.
REFERENCES:
patent: 4653012 (1987-03-01), Duffy et al.
patent: 4752828 (1988-06-01), Chapuis et al.
patent: 5019809 (1991-05-01), Chen
Ba Huynh
GE Yokogawa Medical Systems Limited
Kojima Moonray
Powell Mark R.
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