Results 21 to 30 of about 14,271,610 (145)
, 2013 In this paper, we introduce Gabor shearlets, a variant of shearlet systems, which are based on a different group representation than previous shearlet constructions: they combine elements from Gabor and wavelet frames in their construction.
Bodmann, Bernhard G. +2 more
core +2 more sources
Dilational Symmetries of Decomposition and Coorbit Spaces [PDF]
Applied and Computational Harmonic Analysis, 2023 We investigate the invariance properties of general wavelet coorbit spaces and Besov-type decomposition spaces under dilations by matrices. We show that these matrices can be characterized by quasi-isometry properties with respect to a certain metric in ...
Hartmut Fuhr, R. R. Tousi
semanticscholar +1 more source
[Retracted] An Image Fusion Algorithm Based on Improved RGF and Visual Saliency Map
Emergency Medicine International, Volume 2022, Issue 1, 2022., 2022 To solve the artifact problem in fused images and the lack of enough generalization under different scenarios of existing fusion algorithms, the paper proposes an image fusion algorithm based on improved RGF and visual saliency map to realize fusion for infrared and visible light images and a multimode medical image.
Yang Li +3 more
wiley +1 more source
All the Groups of Signal Analysis from the (1+1)-affine Galilei Group [PDF]
, 2011 We study the relationship between the (1+1)-affine Galilei group and four groups of interest in signal analysis and image processing, viz., the wavelet or the affine group of the line, the Weyl-Heisenberg, the shearlet and the Stockwell groups.
Ali, S. Twareque +1 more
core +2 more sources
Image interpolation using Shearlet based iterative refinement [PDF]
, 2013 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 high resolution image using linear methods like FIR filtering, (b) promoting ...
Kutyniok, G. +5 more
core +2 more sources
Reproducing formulas for generalized translation invariant systems on locally compact abelian groups [PDF]
, 2015 In this paper we connect the well established discrete frame theory of generalized shift invariant systems to a continuous frame theory. To do so, we let $\Gamma_j$, $j \in J$, be a countable family of closed, co-compact subgroups of a second countable ...
Jakobsen, Mads Sielemann, Lemvig, Jakob
core +2 more sources
Wavelet Coorbit Spaces viewed as Decomposition Spaces [PDF]
, 2014 In this paper we show that the Fourier transform induces an isomorphism between the coorbit spaces defined by Feichtinger and Gr\"ochenig of the mixed, weighted Lebesgue spaces $L_{v}^{p,q}$ with respect to the quasi-regular representation of a semi ...
Führ, Hartmut, Voigtlaender, Felix
core +1 more source
Iterative CT reconstruction using shearlet-based regularization [PDF]
, 2012 In computerized tomography, it is important to reduce the image noise without increasing the acquisition dose. Extensive research has been done into total variation minimization for image denoising and sparse-view reconstruction. However, TV minimization
Goossens, Bart +6 more
core +1 more source
Multivariate $\alpha$-molecules
, 2016 The suboptimal performance of wavelets with regard to the approximation of multivariate data gave rise to new representation systems, specifically designed for data with anisotropic features.
Flinth, Axel, Schäfer, Martin
core +1 more source
Study of architectural forms of invasive carcinoma based on the measurement of pattern complexity
Mathematical Modelling of Natural Phenomena, 2022 Several years ago, a new paradigm of cancer perception emerged, considering a tumor not as a senseless heap of cells but as a self-organizing heterogeneous tissue of cancer cells that collectively fight for survival.
D. Bratsun, I. Krasnyakov
semanticscholar +1 more source