Computer graphics processing and selective visual display system – Display peripheral interface input device
Reexamination Certificate
1998-08-12
2001-07-24
Brier, Jeffery (Department: 2779)
Computer graphics processing and selective visual display system
Display peripheral interface input device
Reexamination Certificate
active
06266044
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to the creation of color blends for computer graphics and in particular describes a simplified format and apparatus for the creation of blends.
BACKGROUND ART
Apparatus for the creation of smooth shaded continuous tone images exist in various forms. For example, U.S. Pat. No. 4,958,272 (Wake) entitled “Apparatus and Method for Generating Smooth Shaded Continuous Tone Images” discloses a system for defining the boundaries of curve shape data and subsequently deriving an intensity level from a surface map of the defined curve shape data.
U.S. Pat. No. 3,996,673 (Vorst et al.) Entitled “Image Generating Means” also discloses a system for the creation of a “blend” or smooth shaded continuous tone image through the defining of a boundary perimeter and an interpolation process for deriving final intensity values.
While these methods are satisfactory, their implementation is of undue complexity both in storage format and execution. Additionally, the alteration of the nature of the blend is again somewhat difficult, with the recalculation of a perimeter being required.
It is an object of the present invention to provide an improved form of blend creation.
SUMMARY OF THE INVENTION
In accordance with one aspect of the invention there is provided a method of calculating a color blend for an output image comprising a series of pixels, said method comprising, for each color component of said output image:
deriving a surface equation from a set of desired intensity values at a first arbitrary, non-coincident set of points of the output image; and
for each desired output point of said output image, utilising said equation to derive an output intensity value.
In accordance with another aspect of the present invention there is provided a blend calculation system for calculating a color blend for an output image, said system comprising:
a plurality of blend calculators for calculating color component intensity values, the number of said blend calculators corresponding to the number of desired color components in said output image, each of said blend calculators comprising.
a coefficient input means for the input of equation coefficient values to an equation calculator; and
an equation calculator, connected to said coefficient input means, for calculating a color component intensity value.
REFERENCES:
patent: 4958272 (1990-09-01), Wake
patent: 5227863 (1993-07-01), Bilbrey et al.
patent: 5347618 (1994-09-01), Akeley
patent: 5459823 (1995-10-01), Silverbrook et al.
patent: 5673422 (1997-09-01), Hiroyuki et al.
patent: B8022691 (1992-01-01), None
patent: WO 91/19242 (1991-12-01), None
Brier Jeffery
Canon Kabushiki Kaisha
Fitzpatrick ,Cella, Harper & Scinto
Harrison Chante'
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