Local regularity-based image denoising

Abstract : We present an approach for image denoising based on the analysis of the local Hölder regularity. The method takes the point of view that denoising may be performed by increasing the Hölder regularity at each point. Under the assumption that the noise is additive and white, we show that our procedure is asymptotically minimax, provided the original signal belongs to a ball in some Besov space. Such a scheme is well adapted to the case where the image to be recovered is itself very irregular, e.g. nowhere differentiable with rapidly varying local regularity. The method is implemented through a wavelet analysis. We show an application to SAR image denoising where this technique yields good results compared to other algorithms.
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Communication dans un congrès
ICIP03, IEEE International Conference on Image Processing, Sep 2003, Barcelona, Spain. III, pp.377-380, 2003
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Pierrick Legrand, Jacques Lévy Véhel. Local regularity-based image denoising. ICIP03, IEEE International Conference on Image Processing, Sep 2003, Barcelona, Spain. III, pp.377-380, 2003. 〈inria-00576475〉

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