Blend control system

Details Blend control system Blend control system

1996-06-14

1999-12-14

Nguyen, Phu K.

Computer graphics processing and selective visual display system

Computer graphics processing

Graph generating

G06T 1700

Patent

active

060024089

ABSTRACT:
A method and apparatus for determining color blend of a computer graphical object involves providing a plurality of interactive control points, with each of the control points having an associated color value; and calculating a color value of each portion of the object depending on its relative position to the control points. Preferably, the number of control points is two. Preferably, the position or associated color value of each of the control points can be interactively altered and the method further comprises the step of recalculating the color values of each portion of the object when the control points are altered. Preferably, the portions of the object having a projection outside a line taken between the two control points are determined to have a color substantially the same as the closest one of the control points (5,6).

REFERENCES:
patent: 5467443 (1995-11-01), Johnson et al.
patent: 5487020 (1996-01-01), Long
patent: 5586232 (1996-12-01), Yoshida
patent: 5611036 (1997-03-01), Berend et al.
patent: 5682505 (1997-10-01), Usami et al.
patent: 5854633 (1998-12-01), Cooper et al.
James Foley, et al., Computer Graphics: Principles and Practice, Addison-Wesley Publishing Company, Inc., pp. 92-94 and 979-982 (1990).

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