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Progressive low bit rate coding of simple 3D objects with Matching Pursuit

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Deformation in thin SiN membranes due to residual stresses

For the patterning on 'unconventional' surfaces and/or non-IC applications new micro- and nanopat- terning technologies are developed. One of these techniques is the localized material deposi- tion through ultra-miniature shadow masks (nanostencils). Nanos ...

2005

MP3D: Highly Scalable Video Coding Scheme Based on Matching Pursuit

Pascal Frossard, Pierre Vandergheynst, Adel Rahmoune

This paper describes a novel video coding scheme based on a three-dimensional Matching Pursuit algorithm. In addition to good compression performance at low bit rate, the proposed coder allows for flexible spatial, temporal and rate scalability thanks to i ...

IEEE2004

Video Representation Using Greedy Approximations Over Redundant Parametric Dictionaries

Michel Bierlaire, Pierre Vandergheynst, Oscar Divorra Escoda

In this work, we explore a framework for the sparse representation of video sequences by means of spatio-temporal functions able to exploit the 2D nature of images as well as the temporal smoothness often associated to object trajectories. Decomposition ov ...

2004

Compression of 3D models with NURBS

Diego Santa Cruz Ducci

With recent progress in computing, algorithmics and telecommunications, 3D models are increasingly used in various multimedia applications. Examples include visualization, gaming, entertainment and virtual reality. In the multimedia domain 3D models have b ...

EPFL2003

Very low bit rate image coding using redundant dictionaries

Pierre Vandergheynst, Lorenzo Granai, Lorenzo Peotta

Very low bit rate image coding is an important problem regarding applications such as storage on low memory devices or streaming data on the internet. The state of the art in image compression is to use 2-D wavelets. The advantages of wavelet bases lie in ...

SPIE2003

High flexibility scalable image coding

Pascal Frossard, Pierre Vandergheynst

This paper presents a new, highly flexible, scalable image coder based on a Matching Pursuit expansion. The dictionary of atoms is built by translation, rotation and anisotropic refinement of gaussian functions, in order to efficiently capture edges in nat ...

SPIE2003

A Fast and Robust 3D Feature Extraction Algorithm for Structured Environment Reconstruction

Roland Siegwart, Jan Weingarten

This paper describes an algorithm for generating compact feature-based 3D models of indoor environments with a mobile robot. The emphasis lies on the high performance of the algorithm, its possible incremental use, as well as its wide applicability to a va ...

2003

Splines and wavelets for image warping and projection

Stefan Horbelt

This thesis investigates advanced signal processing concepts and their application to geometric processing and transformations of images and volumes. In the first part, we discuss the class of transformations that project volume data onto a plane using par ...

EPFL2001

Redundancy in Non-Orthogonal Transforms

Pascal Frossard, Pierre Vandergheynst

Compression efficiency is mainly driven by redundancy of the overcomplete set of functions chosen for the signal decomposition. In Matching Pursuit algorithms for example, the redundancy of the dictionary influences the convergence of the residual energy. ...

EUSIPCO2001

A Posteriori Quantized Matching Pursuit

Pascal Frossard, Pierre Vandergheynst

This paper studies quantization error in the context of Matching Pursuit coded streams and proposes a new coefficient quantization scheme taking benefit of the Matching Pursuit properties. The coefficients energy in Matching Pursuit indeed decreases with t ...

EUSIPCO2001