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Reconstruction of Wavelet Coefficients Using Total Variation Minimization

Published: 01 January 2003 Publication History
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  • Abstract

    We propose a model to reconstruct wavelet coefficients using a total variation minimization algorithm. The approach is motivated by wavelet signal denoising methods, where thresholding small wavelet coefficients leads to pseudo-Gibbs artifacts. By replacing these thresholded coefficients by values minimizing the total variation, our method performs a nearly artifact-free signal denoising. In this paper, we detail the algorithm based on a subgradient descent combining a projection on a linear space. The convergence of the algorithm is established and numerical experiments are reported.

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    Published In

    cover image SIAM Journal on Scientific Computing
    SIAM Journal on Scientific Computing  Volume 24, Issue 5
    2003
    373 pages

    Publisher

    Society for Industrial and Applied Mathematics

    United States

    Publication History

    Published: 01 January 2003

    Author Tags

    1. 26A45
    2. 65K10
    3. 65T60
    4. 94A12

    Author Tags

    1. wavelet
    2. total variation
    3. denoising
    4. subgradient method

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    • (2021)Sparsity-Assisted Signal Denoising and Pattern Recognition in Time-Series DataCircuits, Systems, and Signal Processing10.1007/s00034-021-01774-x41:1(249-298)Online publication date: 3-Jul-2021
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