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A new orientation-adaptive interpolation method
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DOI：10.1109/TIP.2007.891794.png)
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摘要
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We propose an isophote-oriented, orientation-adaptive interpolation method. The proposed method employs an interpolation kernel that adapts to the local orientation of isophotes, and the pixel values are obtained through an oriented, bilinear interpolation. We show that, by doing so, the curvature of the interpolated isophotes is reduced, and, thus, zigzagging artifacts are largely suppressed. Analysis and experiments show that images interpolated using the proposed method are visually pleasing and almost artifact free.
Keyword:
curvature
directional interpolation
image interpolation
isophote
zigzagging
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