Results 91 to 100 of about 1,628 (189)

On Y. Nievergelt's inversion formula for the Radon transform [PDF]

, 2009
We generalize Y. Nievergelt's inversion method for the Radon transform on lines in the 2-plane to the $k$-plane Radon transform of continuous and $L^p$ functions on $R^n$ for all $1\leq ...
Ournycheva, Elena, Rubin, Boris
core   +1 more source

Extracting Filaments Based on Morphology Components Analysis from Radio Astronomical Images

Advances in Astronomy, 2019
Filaments are a type of wide-existing astronomical structure. It is a challenge to separate filaments from radio astronomical images, because their radiation is usually weak. What is more, filaments often mix with bright objects, e.g., stars, which makes
M. Zhu, W. Liu, B. Y. Wang, M. F. Zhang, W. W. Tian, X. C. Yu, T. H. Liang, D. Wu, D. Hu, F. Q. Duan   +9 more
doaj   +1 more source

Extraction of Face Features Using Various Techniques [PDF]

, 2014
This thesis aims at devising a novel method of feature extraction of face images which proves to be faster and more accurate than the existing methods defined by wavelet, curvelet and ridgelet transforms.
Biswal, Shruti
core  

Automatic detection of ship tracks in ATSR-2 satellite imagery [PDF]

Atmospheric Chemistry and Physics, 2009
Ships modify cloud microphysics by adding cloud condensation nuclei (CCN) to a developing or existing cloud. These create lines of larger reflectance in cloud fields that are observed in satellite imagery.
E. Campmany, R. G. Grainger, S. M. Dean, A. M. Sayer   +3 more
doaj  

A HYBRID FACE RECOGNITION APPROACH USING LOCAL FUSION OF COMPLEX DUAL-TREE WAVELET COEFFICIENTS AND RIDGELET TRANSFORM [PDF]

ICTACT Journal on Image and Video Processing, 2011
In this paper, we propose novel face recognition method based on local appearance feature extraction using hybrid mode of local ridge- let and fused dual-tree complex wavelet transform (DT-CWT).
K. Jaya Priya, R.S. Rajesh
doaj  

A ridgelet neural network approach to sports image classification: Optimization using advanced Parrot algorithm

Ain Shams Engineering Journal
Recently, the sports images classification has been transformed into an extremely important subject due to its rising applicability in sports-oriented applications.
Jie Cao, SiYuan Niu
doaj   +1 more source

Gravimetric evidences of active faults and underground structure of the Cheliff seismogenic basin (Algeria)

, 2014
International audienceThe Cheliff basin (ex El Asnam) is known as one of the most seismic active zone in Algeria and the West Mediterranean region. We can cite the El Asnam earthquake which occurred in 10.10.01980 with magnitude of 7.3.
Anderson, Anderson, Auzende, Auzende, Aïfa, Barbosa, Bezzeghoud, Bosch, Boschetti, Boukerbout, Boukerbout, Chiarabba, Cuer, Debeglia, Fedi, Galdeano, Gerard, Groupe de Recherche néotectonique de l’arc de Gibraltar, Hartman, Holshneider, Hornby, Hsu, Idres, Idres, Keating, Li, Mallat, Marson, Martelet, Mattauer, McDonald, Meghraoui, Meghraoui, Mikhailov, Minster, Moreau, Moreau, Morel, Nabighian, Nabighian, Ouyed, Parker, Peters, Philip, Pilkington, Pilkington, Reid, Roest, Sailhac, Sailhac, Sailhac, Salem, Salem, Smith, Smith, Stavrev, Tarantola, Tass, Thompson, Thurston, Thurston, Vallée   +61 more
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Multi-scale analysis of the roughness effect on lubricated rough contact [PDF]

, 2014
Determining friction is as equally essential as determining the film thickness in the lubricated contact, and is an important research subject. Indeed, reduction of friction in the automotive industry is important for both the minimization of fuel ...
DEMIRCI, Ibrahim
core   +2 more sources

Image Decomposition and Separation Using Sparse Representations: An Overview [PDF]

, 2010
This paper gives essential insights into the use of sparsity and morphological diversity in image decomposition and source separation by reviewing our recent work in this field.
Bobin, Jérôme, Fadili, M. Jalal, Moudden, Yassir, Starck, Jean-Luc   +3 more
core  

Ridgelet-type Frame Decompositions for Sobolev Spaces related to Linear Transport [PDF]

, 2018
In this paper we study stability properties of ridgelet and curvelet frames for mixed-smoothness Sobolev spaces with norm $\|f\|_{s} = \|f\|_{L_{2}(\mathbb{R}^{d})} +\|s\cdot\nabla f\|_{L_{2}(\mathbb{R}^{d})}$ .
Grohs, P.
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