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US 2010/0135588 A1Published application
Method and apparatus for subpixel-based down-sampling
AssigneeHong Kong Applied Science and Technology Research Institute Company Limited
InventorsOscar Chi-Lim Au, Lu Fang, Hon Wah Wong, Yi Yang, Yan Huo
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Abstract
This invention relates to method and apparatus for subpixel-based down-sampling. This invention implements an adaptive filter 140 based on edge detection, which removes visible color fringing artifacts while efficiently retaining sharpness.
Claims12
A method for down-sampling an xM by yN image, comprising:
- sampling an xM by yN image into a 3M by 3N image;
- detecting one or more edges in the 3M by 3N image;
- applying a filter adaptively on the 3M by 3N image based on edge detection;
- and
- subpixel-based down-sampling the 3M by 3N image into a M by N image.
2 more elements
An apparatus for down-sampling an xM by yN image, comprising:
- a sampler sampling an xM by yN image into a 3M by 3N image;
- an edge detector detecting one or more edges in the 3M by 3N image;
- a filter filtering adaptively on the 3M by 3N image based on edge detection;
- and
- a subpixel-based sampler down-sampling the 3M by 3N image into a M by N image on subpixel basis.
2 more elements
Dependencies are inferred from the claim text.