Results 51 to 60 of about 360 (169)
Planelets: A New Analysis Tool For Planar Feature Extraction [PDF]
, 2004 Locally planar structures, formed by sweeping edges of objects, are commonly found in video sequences and convey most of the useful information. In this paper, the issue of efficient representation of such structures is addressed.
Yao, Zhen +5 more
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Ridgelet transform applied to motion compensated images [PDF]
Wavelet transform is a powerful instrument in catching zero-dimensional singularities. Ridgelets are a powerful instrument in catching and representing mono-dimensional singularities in bidimensional space.
Moschetti, F. +2 more
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The finite ridgelet transform for image representation
IEEE Transactions on Image Processing, 2003 The ridgelet transform was introduced as a sparse expansion for functions on continuous spaces that are smooth away from discontinuities along lines. We propose an orthonormal version of the ridgelet transform for discrete and finite-size images. Our construction uses the finite Radon transform (FRAT) as a building block.
Minh N. Do, Martin Vetterli
openaire +3 more sources
2D Empirical Transforms. Wavelets, Ridgelets and Curvelets revisited
A recently developed new approach, called ``Empirical Wavelet Transform\u27\u27, aims to build 1D adaptive wavelet frames accordingly to the analyzed signal. In this paper, we present several extensions of this approach to 2D signals (images). We revisit
Tran, Giang +2 more
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On the subexponentiality of the ridgelet transform
Comptes Rendus. Mathématique, 2014 We show that we can consider the ridgelet transform for Wiener functionals as a subexponential random variable. We give an application of this result to random walks.
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Curvelet-based Change Detection for man-made Objects from SAR Images
, 2009 In this article we present a technique for fast and robust change detection based on the curvelet transform. The curvelet transform is a two dimensional further development of the well-known wavelet transform that reconstructs the original image by ridge-
Roth, Achim +5 more
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, 2014 Chapitre 3International audienceIn this chapter we review a variety of 3D sparse representations developed in recent years and adapted to different kinds of 3D signals. In particular, we describe 3D wavelets, ridgelets, beamlets and curvelets.
Starck, Jean-Luc +3 more
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, 2011 Coronal mass ejections (CMEs) are large-scale eruptions of plasma and magnetic field that can produce adverse space weather at Earth and other locations in the Heliosphere. Due to the intrinsic multiscale nature of features in coronagraph images, wavelet
GALLAGHER, PETER +2 more
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Satellite imagery fusion with an equalized trade-off between spectral and spatial quality
, 2010 En este trabajo se propone una estrategia para obtener imágenes fusionadas con calidad espacial y espectral equilibradas. Esta estrategia está basada en una representación conjunta MultiDirección-MultiRresolución (MDMR), definida a partir de un banco de ...
Gonzalo Martín, Consuelo +1 more
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A Note on Curvelets and Multiscale Directional Transforms (Signal analysis and time-frequency analysis) [PDF]
, 2019 We present a brief review on curvelets while describing their related topics in efficient representations for a multivariate function. Starting from the approximation theory by a frame in a Hilbert space, we attempt to construct a family of curvelets and
Fujinoki, Kensuke
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