| 摘要 |
The invention provides a method and apparatus for creating anti-aliasing effects in slanted or curved edge portions of a bit-mapped image while avoiding such effects at horizontal and vertical edge portions. A method in accordance with the invention comprises the steps of: (a) defining a set of plot instructions for plotting an ideal outline of a desired image; (b) identifying a target resolution to be provided by a bit-mapped rendering apparatus; (c) scaling and grid-fitting the outline to the identified target resolution; (d) upwardly scaling the grid-fitted outline to a mezzanine resolution level that is higher than the identified resolution of the target display medium; (e) filling the outline at the mezzanine resolution level (scan conversion); (f) assigning, based on the mezzanine level outline fill, one or more of a grayscale value or other anti-aliasing attribute values to each corresponding pixel of the target display medium (sampling); and (g) rendering the image in accordance with this attribute assignment onto the target display medium for appreciation by a human observer.
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