Approximation properties of multivariate wavelets
Mathematics of Computation
Journal of Computational and Applied Mathematics - Special issue: Approximation theory, wavelets, and numerical analysis
Linearized Bregman Iterations for Frame-Based Image Deblurring
SIAM Journal on Imaging Sciences
Full length article: Compactly supported shearlets are optimally sparse
Journal of Approximation Theory
SIAM Journal on Imaging Sciences
The contourlet transform: an efficient directional multiresolution image representation
IEEE Transactions on Image Processing
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In this paper, we first introduce the concept of an adaptive multiresolution analysis (AMRA) structure, which is a variant of the classical MRA structure well suited to the main goal of a fast flexible decomposition strategy adapted to the data at each decomposition level. We then study this novel methodology for the general case of affine-like systems and derive a unitary extension principle (UEP) for filter design. Finally, we apply our results to the directional representation system of shearlets. This leads to a comprehensive theory for fast decomposition algorithms associated with shearlet systems which encompasses tight shearlet frames with spatially compactly supported generators within such an AMRA structure. Also, shearlet-like systems associated with parabolic scaling and unimodular shear matrices are studied within this framework.