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Nonlinear Image Upsampling Method Based on Radial Basis Function Interpolation
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DOI：10.1109/TIP.2010.2050108.png)
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Abstract
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In this paper, we present a novel edge-directed upsampling method based on radial basis function (RBF) interpolation. In order to remove artifacts such as blurred edges or blocking effects, we suggest a nonlinear method capable of taking edge information into account. The resampling evaluation is determined according to the edge orientation. The proposed scheme is as simple to implement as linear methods but it demonstrates improved visual quality by preserving the edge features better than the classical linear interpolation methods. The algorithm is compared with some well-known linear schemes as well as recently developed nonlinear schemes. The resulting images demonstrate the new algorithm's ability to magnify an image while preserving the edge features.
Keywords:
Curvature
edge-directed interpolation
image upsampling
radial basis function (RBF)
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