Type size dependent anti-aliasing in sub-pixel precision rendering systems
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United States of America Patent
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Jan 10, 2006
Issued Date -
N/A
app pub date -
Feb 3, 2005
filing date -
May 14, 2002
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Methods and systems for selecting different anti-aliasing filters to be applied to objects of image data rendered with pixel sub-component precision based on the attributes of the objects of the graphics image. For example, when rendering a character traditional anti-aliasing applied in the direction parallel to the striping of the pixel sub-components is adapted to the unique requirements of different character font sizes such that a large amount of anti-aliasing is applied to large font sizes while a small amount of anti-aliasing is provided for characters at small font sizes. Displaced sampling is utilized to determine the alpha values for a plurality of vertical samples for each RGB pixel sub-component. The selected anti-aliasing filter is applied to the alpha values to determine the luminous intensity values of the RGB pixel sub-components.
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