Computer graphics processing and selective visual display system – Computer graphics processing – Three-dimension
Reexamination Certificate
2007-08-14
2007-08-14
Nguyen, Phu K. (Department: 2628)
Computer graphics processing and selective visual display system
Computer graphics processing
Three-dimension
C345S427000, C345S428000
Reexamination Certificate
active
10672381
ABSTRACT:
An image processing apparatus for finding reflectivity based on a BRDF model expressing a ratio of reflection of light incident upon one point of a surface of an object to be drawn at the object surface, the image processing apparatus having an operation unit for calculating the reflectivity based on a BRDF model calculated by a quadratic-form matrix expression including a vector comprised of a light source direction vector, a viewpoint direction vector, and a normal direction vector and a matrix determining the characteristics of the BRDF model, thereby able to achieve both a variety of expression power and good operation efficiency when mounted in a programmable pixel shader and further having enough of a compactness to easily cope with a shift-variant BRDF, and a method of the same.
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Finnegan Henderson Farabow Garrett & Dunner L.L.P.
Nguyen Phu K.
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