Method and apparatus for rendering images

Details Method and apparatus for rendering images Method and apparatus for rendering images

G - Physics

06

T

G06T 11/20 (2006.01) G06F 5/10 (2006.01) G06F 7/78 (2006.01)

Patent

CA 2153383

A rendering device for converting input information into a bit map including a Bezier subdivision processor responsive to Bezier curve information describing a Bezier curve of an image. The Bezier subdivision processor performs at least one subdivision on the Bezier curve if the Bezier curve is greater than a desired resolution of a bit map to produce subdivided Bezier curves until all subdivided Bezier curves are at about the resolution of the bit map. The Bezier subdivision processor produces cross information from each Bezier curve which makes one crossing of a grid having the resolution of the bit map. The rendering device also includes a digital processor responsive to the cross information and operative to produce a bit map of the image from the cross information. A method for producing cross positions of Bezier curves with a grid of the present invention includes receiving a Bezier curve, sequentially subdividing the Bezier curve into a plurality of subdivided Bezier curves until each Bezier curve crosses less than a plurality of times with cell boundaries of a grid of a desired resolution, and developing the Cartesian coordinates and direction of each of the crosses of a Bezier curve with a boundary.

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