Publications de Iva Bogdanova Vandergheynst

A Multi-Lead Ecg Classification Based On Random Projection Features

David Atienza Alonso, Francisco Javier Rincon Vallejos, Iva Bogdanova Vandergheynst

This paper presents a novel method for classification of multi-lead electrocardiogram (ECG) signals. The feature extraction is based on the random projection (RP) concept for dimensionality reduction. Furthermore, the classification is performed by a neuro ...

IEEE Press2012

A Multi-Lead ECG Classification Based on Random Projection Features

David Atienza Alonso, Iva Bogdanova Vandergheynst

This paper presents a novel method for classification of multilead electrocardiogram (ECG) signals. The feature extraction is based on the random projection (RP) concept for dimensionality reduction. Furthermore, the classification is performed by a neuro- ...

IEEE Press2012

Scale Invariant Feature Transform on the Sphere: Theory and Applications

Michel Bierlaire, Jean-Philippe Thiran, Javier Cruz Mota, Iva Bogdanova Vandergheynst

A SIFT algorithm in spherical coordinates for omnidirectional images is proposed. This algorithm can generate two types of local descriptors, Local Spherical Descriptors and Local Planar Descriptors. With the first ones, point matching between two omnidire ...

Springer Verlag2012

Dynamic Visual Attention on the Sphere

Pierre-André Farine, Heinz Hügli, Iva Bogdanova Vandergheynst, Alexandre Bur

In this paper we present a computational model of dynamic visual attention on the sphere which combines static (intensity,chromaticity, orientation) and motion features in order to detect salient locations in omnidirectional image sequences while working d ...

Elsevier2010

Dynamic Attentive System for Omnidirectional Video

Pierre-André Farine, Iva Bogdanova Vandergheynst

In this paper, we propose a dynamic attentive system for detecting the most salient regions of interest in omnidirectional video. The spot selection is based on computer modeling of dynamic visual attention. In order to operate on video sequences, the proc ...

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

The spherical approach to omnidirectional visual attention

Heinz Hügli, Iva Bogdanova Vandergheynst, Alexandre Bur

Computational visual attention (VA) has been widely investigated during the last three decades but the conventional algorithms are not suitable for omnidirectional images which often contain a significant amount of radial distortion. Only recently a comput ...

2008

Scale-space analysis and active contours for omnidirectional images

Jean-Philippe Thiran, Pierre Vandergheynst, Xavier Bresson, Iva Bogdanova Vandergheynst

A new generation of optical devices that generate images covering a larger part of the field of view than conventional cameras, namely catadioptric cameras, is slowly emerging. These omnidirectional images will most probably deeply impact computer vision i ...

Institute of Electrical and Electronics Engineers2007

Continuous Wavelet Transform on the Hyperboloid

Pierre Vandergheynst, Iva Bogdanova Vandergheynst

In this paper we build a Continuous Wavelet Transform (CWT) on the upper sheet of the 2-hyperboloid

H_+^2

. First, we define a class of suitable dilations on the hyperboloid through conic projection. Then, incorporating hyperbolic motions belonging to $SO ...

2007

Wavelets on non-Euclidean manifolds

Iva Bogdanova Vandergheynst

This dissertation investigates wavelets as a multiscale tool on non-Euclidean manifolds. The growing importance of using non-Euclidean manifolds as a geometric model for data comes from the diversity of the data collected. In this work we mostly deal with ...

EPFL2006

Laplacian Operator, Diffusion Flow and Active Contour on non-Euclidean Images

Jean-Philippe Thiran, Pierre Vandergheynst, Xavier Bresson, Iva Bogdanova Vandergheynst

We propose here some basic approaches to direct processing of the

360^o

-images as we take into consideration the geometry of each one. Obviously, the geometry of each of these images is a consequence of the geometry of the sensor's mirror used. This tech ...

2005

Iva Bogdanova Vandergheynst

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A Multi-Lead Ecg Classification Based On Random Projection Features

A Multi-Lead ECG Classification Based on Random Projection Features

Scale Invariant Feature Transform on the Sphere: Theory and Applications

Dynamic Visual Attention on the Sphere

Dynamic Attentive System for Omnidirectional Video

The spherical approach to omnidirectional visual attention

Scale-space analysis and active contours for omnidirectional images

Continuous Wavelet Transform on the Hyperboloid

Wavelets on non-Euclidean manifolds

Laplacian Operator, Diffusion Flow and Active Contour on non-Euclidean Images

The spherical approach to omnidirectional visual attention

A Multi-Lead Ecg Classification Based On Random Projection Features

Wavelets on non-Euclidean manifolds

Scale Invariant Feature Transform on the Sphere: Theory and Applications

Dynamic Visual Attention on the Sphere

Laplacian Operator, Diffusion Flow and Active Contour on non-Euclidean Images

Scale-space analysis and active contours for omnidirectional images

Continuous Wavelet Transform on the Hyperboloid

Dynamic Attentive System for Omnidirectional Video

A Multi-Lead ECG Classification Based on Random Projection Features