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2010

Tetrolet shrinkage with anisotropic total variation minimization for image approximation

9 years 6 months ago
Tetrolet shrinkage with anisotropic total variation minimization for image approximation
In this paper, an anisotropic total variation (ATV) minimization is combined with the new adaptive tetrolet transform for discontinuity-preserving image processing. In order to suppress the pseudo-Gibbs artefacts and to increase the regularity, the conventional shrinkage results are further processed by a total variation (TV) minimization scheme, in which only the insignificant tetrolet coefficients of the image are changed by the use of ATV constrained projection, instead of previous TV projections. Numerical experiments of piecewise-smooth images show the good performance of the proposed hybrid method to recover the shape of edges and important detailed directional components, in comparison to some existing methods. Key words: anisotropic total variation minimization, directional wavelets, tetrolet transform, post-processing method, image approximation, data compression, sparse representation 2000 MSC: 42C40, 65T60, 94A12, 94A08
Jens Krommweh, Jianwei Ma
Added 30 Jan 2011
Updated 30 Jan 2011
Type Journal
Year 2010
Where SIGPRO
Authors Jens Krommweh, Jianwei Ma
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