178 citations · 180 across the 7 of their papers we have counts for
15 papers
Adaptive Anisotropic Petrov-Galerkin Methods for First Order Transport Equations
W. Dahmen, G. Kutyniok, W. -Q Lim +2
This paper builds on recent developments of adaptive methods for linear transport equations based on certain stable variational formulations of Petrov-Galerkin type. The variationa…
Optimal Compressive Imaging of Fourier Data
Gitta Kutyniok, Wang-Q Lim
Applications such as Magnetic Resonance Tomography acquire imaging data by point samples of their Fourier transform. This raises the question of balancing the efficiency of the sam…
Dualizable Shearlet Frames and Sparse Approximation
Gitta Kutyniok, Wang-Q Lim
Shearlet systems have been introduced as directional representation systems, which provide optimally sparse approximations of a certain model class of functions governed by anisotr…
Efficient Resolution of Anisotropic Structures
Wolfgang Dahmen, Chunyan Huang, Gitta Kutyniok +3
We highlight some recent new delevelopments concerning the sparse representation of possibly high-dimensional functions exhibiting strong anisotropic features and low regularity in…
ShearLab 3D: Faithful Digital Shearlet Transforms based on Compactly Supported Shearlets
Gitta Kutyniok, Wang-Q Lim, Rafael Reisenhofer
Wavelets and their associated transforms are highly efficient when approximating and analyzing one-dimensional signals. However, multivariate signals such as images or videos typic…
Image interpolation using Shearlet based iterative refinement
H. Lakshman, W. -Q Lim, H. Schwarz +3
This paper proposes an image interpolation algorithm exploiting sparse representation for natural images. It involves three main steps: (a) obtaining an initial estimate of the hig…