Vertex-based predictive shape coding method using adaptive sampl

Details Vertex-based predictive shape coding method using adaptive sampl Vertex-based predictive shape coding method using adaptive sampl

1997-12-19

2000-09-19

Zimmerman, Mark

Computer graphics processing and selective visual display system

Computer graphics processing

Shape generating

382242, G06K 900

Patent

active

061219800

ABSTRACT:
A vertex-based shape coding method and an inter-frame vertex predicting method are provided. The vertex-based shape coding method comprises the steps of: (a) selecting predetermined vertices to code an original curve, when the two-dimensional curve representing the shape of the object is set as the original curve; (b) additionally selecting a new vertex to eliminate ambiguously corresponding points, when the foot of a perpendicular drawn from one point on a straight line formed by sequentially connecting the vertices to a reference vertical or horizontal axis extends up to the original curve, an intersection point between the extended line and the original curve is set as a corresponding point, and at least one intersection point between the original curve and one point on the straight line is set as the ambiguously corresponding point; (c) sampling an error into predetermined sections with respect to the reference vertical or horizontal axis, when a difference between the original curve and the straight line with respect to the reference vertical or horizontal axis is set as the error; and (d) coding the selected vertices and the sampled errors.

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patent: 5898439 (1999-04-01), Takazawa
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