Publications related to Centered Pyramids

Comparison of measured and simulated fast ion velocity distributions in the TEXTOR tokamak

Here we demonstrate a comprehensive comparison of collective Thomson scattering (CTS) measurements with steady-state Monte Carlo simulations performed with the ASCOT and VENUS codes. The measurements were taken at a location on the magnetic axis as well as ...

2011

Analysis of Multiview Omnidirectional Images in a Spherical Framework

Zafer Arican

With the increasing demand of information for more immersive applications such as Google Street view or 3D movies, the efficient analysis of visual data from cameras has gained more importance. This visual information permits to extract some crucial inform ...

EPFL2010

Pyramid-Based Texture Synthesis Using Local Orientation and Multidimensional Histogram Matching

Michaël Unser, Dimitri Nestor Alice Van De Ville, Matthieu Guerquin-Kern

One very influential method for texture synthesis is based on the steerable pyramid by alternately imposing marginal statistics on the image and the pyramid's subbands. In this work, we investigate two extensions to this framework. First, we exploit the st ...

SPIE2009

Variational B-Spline Level-Set: A Linear Filtering Approach for Fast Deformable Model Evolution

Michaël Unser, Philippe Thévenaz, Olivier Bernard

In the field of image segmentation, most level-set-based active-contour approaches take advantage of a discrete representation of the associated implicit function. We present in this paper a different formulation where the implicit function is modeled as a ...

IEEE2009

Fractional Laplacian Pyramids

Michaël Unser, Ricard Delgado Gonzalo, Pouya Dehghani Tafti

We provide an extension of the L-2-spline pyramid (Unser et al., 1993) using polyharmonic splines. We analytically prove that the corresponding error pyramid behaves exactly as a multi-scale Laplace operator. We use the multiresolution properties of polyha ...

Ieee Service Center, 445 Hoes Lane, Po Box 1331, Piscataway, Nj 08855-1331 Usa2009

The Marr Wavelet Pyramid

Michaël Unser, Dimitri Nestor Alice Van De Ville

We introduce a new semi-orthogonal complex wavelet basis of

L _{ 2 }

(\mathbb{R} ^{ 2 }

). The basis functions are associated to the complex gradient-Laplace operator, which plays a central role in image processing. We define analytically a single- ...

IEEE2008

A collaborative approach to image segmentation and behavior recognition from image sequences

Laura Ioana Gui

Visual behavior recognition is currently a highly active research area. This is due both to the scientific challenge posed by the complexity of the task, and to the growing interest in its applications, such as automated visual surveillance, human-computer ...

EPFL2008

Multiplicities of simple closed geodesics and hypersurfaces in Teichmuller space

Hugo Parlier

Using geodesic length functions, we define a natural family of real codimension 1 subvarieties of Teichmuller space, namely the subsets where the lengths of two distinct simple closed geodesics are of equal length. We investigate the point set topology of ...

2008

Scene image classification and segmentation with quantized local descriptors and latent aspect modeling

Pedro Manuel Da Silva Quelhas

The ever increasing number of digital images in both public and private collections urges on the need for generic image content analysis systems. These systems need to be capable to capture the content of images from both scenes and objects, in a compact w ...

École Polytechnique Fédérale de Lausanne2007

Scene image classification and segmentation with quantized local descriptors and latent aspect modeling

Pedro Manuel Da Silva Quelhas

The ever increasing number of digital images in both public and private collections urges on the need for generic image content analysis systems. These systems need to be capable to capture the content of images from both scenes and objects, in a compact w ...

EPFL2007

Centered Pyramids

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Comparison of measured and simulated fast ion velocity distributions in the TEXTOR tokamak

Analysis of Multiview Omnidirectional Images in a Spherical Framework

Pyramid-Based Texture Synthesis Using Local Orientation and Multidimensional Histogram Matching

Variational B-Spline Level-Set: A Linear Filtering Approach for Fast Deformable Model Evolution

Fractional Laplacian Pyramids

The Marr Wavelet Pyramid

A collaborative approach to image segmentation and behavior recognition from image sequences

Multiplicities of simple closed geodesics and hypersurfaces in Teichmuller space

Scene image classification and segmentation with quantized local descriptors and latent aspect modeling

Scene image classification and segmentation with quantized local descriptors and latent aspect modeling

Fractional Laplacian Pyramids

Comparison of measured and simulated fast ion velocity distributions in the TEXTOR tokamak

Pyramid-Based Texture Synthesis Using Local Orientation and Multidimensional Histogram Matching

Analysis of Multiview Omnidirectional Images in a Spherical Framework

A collaborative approach to image segmentation and behavior recognition from image sequences

Multiplicities of simple closed geodesics and hypersurfaces in Teichmuller space

Scene image classification and segmentation with quantized local descriptors and latent aspect modeling

Scene image classification and segmentation with quantized local descriptors and latent aspect modeling

Variational B-Spline Level-Set: A Linear Filtering Approach for Fast Deformable Model Evolution

The Marr Wavelet Pyramid