14 May 2012 Fractional-order bidirectional diffusion for image up-sampling
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Abstract
Following the recently proposed total variation (TV) up-sampling method, we present a novel image up-sampling algorithm based on fractional-order bidirectional diffusion. For the bidirectional diffusion, the forward diffusion occurs on the light side of edge, while the backward diffusion proceeds on the dark side. This bidirectional diffusion can reduce the edge width and avoid the appearances of false edge or texture and block effects. Moreover, the fractional-order derivative is used to avoid strong contrast near the edge in the interpolated images. The experiments show that, unlike the TV up-sampling (TVUP) method, the proposed algorithm does not suffer from the drift of edges, block effect in the smooth regions, false edges, and false texture.
© 2012 SPIE and IS&T
Zemin Ren, Chuanjiang He, Meng Li, "Fractional-order bidirectional diffusion for image up-sampling," Journal of Electronic Imaging 21(2), 023006 (14 May 2012). https://doi.org/10.1117/1.JEI.21.2.023006 . Submission:
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