Method and apparatus for computing a computer graphics image
AssigneeKoninklijke Philips Electronics N.V.
InventorKornelis Meinds
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Abstract
A polygon that is made visible in an image. A selection is made between a first and second algorithm for computing a visual effect of the polygon. The first algorithm computes an update value for the polygon and pixel values for spatially successive pixels in the polygon by successively updating the pixel values using the update value. The second algorithm computes said pixel values for each pixel in the polygon individually, without said updating, the first algorithm being selected if a size of the polygon exceeds a threshold, the second algorithm being selected if the size does not exceed the threshold.
Claims3
A method of computing an image from a computer graphics model that describes at least one polygon that is visible in the image, the method comprising selecting between a first and second algorithm for computing a visual effect of the polygon, wherein the first algorithm computes an update value for the polygon and pixel values for spatially successive pixels in the polygon by successively updating the pixel values using the update value and wherein the second algorithm computes said pixel values for each pixel in the polygon individually, without said updating, the first algorithm being selected if a size of the polygon exceeds a threshold, the second algorithm being selected if the size does not exceed the threshold.
An apparatus for computing an image from a model described by at least one polygon that is visible in the image, the apparatus comprising
- a first processing circuit, dedicated to computing pixel values according to a first algorithm that computes pixel values for spatially successive pixels in the polygon by successively updating the pixel values using an update value;
- a second processing circuit arranged to compare a size of the polygon with a threshold, the second processing circuit setting up the first processing circuit to compute a visual effect of the polygon on the pixel values when the size exceeds a threshold, the second processing circuit computing the pixel values according to a second algorithm which computes the pixel values for the spatially adjacent pixels individually, without said updating, when the size does not exceed the threshold.
Dependencies are inferred from the claim text.