Filtering method and apparatus for recovering an anti-aliasing edge
AssigneeFujitsu Limited
InventorsXuan FU, Jiangli YE
Life of this patent
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Abstract
Embodiments provide a filtering method and apparatus for recovering an anti-aliasing edge. The method includes: calculating, for a nonlinearly filtered image, a variance value of an area surrounding a current pixel used for identifying an edge of the image; and re-filtering the current pixel when the variance value is greater than a predefined first threshold value, so as to recover an anti-aliasing edge. With the embodiments of the present application, aliasing noises resulted from nonlinear transform may be alleviated, thereby recovering an anti-aliasing edge of a natural object.
Claims10
A filtering method for recovering an anti-aliasing edge, comprising:
- calculating, for a nonlinearly filtered image, a variance value of an area surrounding a current pixel, the variance value is used for identifying an edge of the image;
- and
- re-filtering the current pixel when the variance value is greater than a predefined first threshold value, so as to recover an anti-aliasing edge.
A filtering apparatus for recovering an anti-aliasing edge, comprising:
- a variance value calculation unit configured to calculate, for a nonlinearly filtered image, a variance value of an area surrounding a current pixel, the variance value is used for identifying an edge of the image;
- and
- a re-filtering unit configured to re-filter the current pixel to recover an anti-aliasing edge when the variance value is greater than a predefine first threshold value.
Dependencies are inferred from the claim text.