To realize rendering by voxel division by which aliasing does not occur with a small amount of required memory capacity in an image processing using a rendering method such as rate racing.
The three axes of a three-dimensional space V to be a display object are adopted as an X-axis, a Y-axis and a Z-axis with a viewpoint as an original point and a screen S or displaying is vertically positioned as against the Z-axis. When it is assumed, the three-dimensional space V is divided into D (a certain integer) in parallel with a screen plane. Besides, it is divided by a plane passing the view point and the boundary of a pixel on the screen S to generate truncated pyramids. The truncated pyramids are assigned to a three-dimensional arrayal memory M, the intersection point of a light beam from the viewpoint with an object is located on the memory M and intersection is judged.
HARADA IKUO
KITAZAWA HITOSHI
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