Results 11 to 20 of about 4,434 (214)
Applied and Computational Harmonic Analysis, 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 +8 more sources
ShearLab 3D: Faithful Digital Shearlet Transforms based on Compactly Supported Shearlets [PDF]
ACM Transactions on Mathematical Software, 2014 Wavelets and their associated transforms are highly efficient when approximating and analyzing one-dimensional signals. However, multivariate signals such as images or videos typically exhibit curvilinear singularities, which wavelets are provably ...
Kutyniok, Gitta +2 more
core +7 more sources
Linearized Riesz transform and quasi-monogenic shearlets [PDF]
Int. J. Wavelets Multiresolution Inf. Process., 2014 The only quadrature operator of order two on L2(ℝ2) which covaries with orthogonal transforms, in particular rotations is (up to the sign) the Riesz transform. This property was used for the construction of monogenic wavelets and curvelets.
S. Häuser +2 more
openalex +2 more sources
Face Antispoofing Using Shearlets: An Empirical Study [PDF]
SAIEE Africa Research Journal, 2019 Face recognition - A promise made to the modern technologists as the ultimate access control or surveillance technology. However, similar to its fingerprint spoofing counterpart, current face antispoofing technology is still vulnerable to inexpensive ...
Dustin van der Haar
openalex +2 more sources
A Shearlets-Based Method for Rain Removal from Single Images [PDF]
Applied Sciences, 2019 This work focuses on the problem of rain removal from a single image. The directional multilevel system, Shearlets, is used to describe the intrinsic directional and structure sparse priors of rain streaks and the background layer.
Guomin Sun, Jinsong Leng, Carlo Cattani
openalex +2 more sources
Shearlets and Optimally Sparse Approximations [PDF]
, 2011 Multivariate functions are typically governed by anisotropic features such as edges in images or shock fronts in solutions of transport-dominated equations.
DL Donoho +12 more
core +3 more sources
Digital Shearlet Transforms [PDF]
, 2012 Over the past years, various representation systems which sparsely approximate functions governed by anisotropic features such as edges in images have been proposed. We exemplarily mention the systems of contourlets, curvelets, and shearlets. Alongside the theoretical development of these systems, algorithmic realizations of the associated transforms ...
Gitta Kutyniok +2 more
openalex +6 more sources
Shearlets and Microlocal Analysis [PDF]
, 2012 Although wavelets are optimal for describing pointwise smoothness properties of univariate functions, they fail to efficiently characterize the subtle geometric phenomena of multidimensional singularities in high-dimensional functions. Mathematically these phenomena can be captured by the notion of the wavefront set which describes point- and direction-
Philipp Grohs
openalex +4 more sources
An Automated Brain Image Analysis System for Brain Cancer using Shearlets
Computer systems science and engineering, 2022 In this paper, an Automated Brain Image Analysis (ABIA) system that classifies the Magnetic Resonance Imaging (MRI) of human brain is presented. The classification of MRI images into normal or low grade or high grade plays a vital role for the early ...
R. Muthaiyan, M. Malleswaran
semanticscholar +1 more source
$p$-adic Dual Shearlet Frames [PDF]
Sahand Communications in Mathematical Analysis, 2019 We introduced the continuous and discrete $p$-adic shearlet systems. We restrict ourselves to a brief description of the $p$-adic theory and shearlets in real case.
Mahdieh Fatemidokht +1 more
doaj +1 more source