Computer graphics processing and selective visual display system – Computer graphics processing – Attributes
Reexamination Certificate
2006-06-20
2006-06-20
Razavi, Michael (Department: 2672)
Computer graphics processing and selective visual display system
Computer graphics processing
Attributes
C345S619000, C345S646000, C345S647000, C345S660000, C345S665000, C382S298000, C382S299000, C382S300000
Reexamination Certificate
active
07064770
ABSTRACT:
A method and system for circularly symmetric anisotropic filtering over an extended elliptical or rectangular footprint in single-pass digital image warping are disclosed. The filtering is performed by first finding and adjusting an ellipse that approximates a non-uniform image scaling function in a mapped position of an output pixel in the input image space. A linear transformation from this ellipse to a unit circle in the output image space is determined to calculate input pixel radii inside the footprint and corresponding filter coefficient as a function of the radius. The shape of the footprint is determined as a trade-off between image quality and processing speed. In one implementation, profiles of smoothing and warping components are combined to produce sharper or detail enhanced output image. The method and system of the invention produce natural output image without jagging artifacts, while maintaining or enhancing the sharpness of the input image.
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The following three notices (1)-(3) are PCT notices in the corresponding PCT Application No. PCT/US04/29393.
(1) Notification of Transmittal of the International Search Report and the Written Opinion of the International Searching Authority, or the Declaration.
(2) International Search Report.
(3) Written Opinion of the International Searching Authority.
Lachine Vladimir
Lee Louie
Smith Gregory Lionel
Razavi Michael
Silicon Optix Inc.
Woods Eric
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