Apparatus and method for performing hidden surface removal...

Details Apparatus and method for performing hidden surface removal... Apparatus and method for performing hidden surface removal...

2011-05-24

2011-05-24

Broome, Said (Department: 2628)

Computer graphics processing and selective visual display system

Computer graphics processing

Three-dimension

C345S419000, C345S422000

Reexamination Certificate

active

07948486

ABSTRACT:
An image processing apparatus includes a first and second Z value calculators that calculate a polygon Z value and a block Z value, respectively. The polygon Z value is a coordinate value of a pixel located at a closest point to a viewpoint. The block Z value is a coordinate value of a pixel located at a closest point to the viewpoint in a block. The apparatus also includes a Z value selector that selects a Z value of a pixel closer to the viewpoint from the polygon Z value and the block Z value as an estimate Z value; and a hidden-surface removal unit that eliminates drawing of the polygon in the block when a pixel corresponding to the estimate Z value is located at a farther point from the viewpoint than a pixel located at a farthest point from the viewpoint.

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