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research article

Robust image reconstruction from multi-view measurements

Puy, Gilles  
•
Vandergheynst, Pierre  
2014
SIAM Journal on Imaging Sciences

We propose a novel method to accurately reconstruct a set of images representing a single scene from few linear multi-view measurements. Each observed image is modeled as the sum of a background image and a foreground one. The background image is common to all observed images but undergoes geometric transformations, as the scene is observed from different viewpoints. In this paper, we assume that these geometric transformations are represented by a few parameters, e.g., translations, rotations, affine transformations, etc.. The foreground images differ from one observed image to another, and are used to model possible occlusions of the scene. The proposed reconstruction algorithm estimates jointly the images and the transformation parameters from the available multi-view measurements. The ideal solution of this multi-view imaging problem minimizes a non-convex functional, and the reconstruction technique is an alternating descent method built to minimize this functional. The convergence of the proposed algorithm is studied, and conditions under which the sequence of estimated images and parameters converges to a critical point of the non-convex functional are provided. Finally, the efficiency of the algorithm is demonstrated using numerical simulations for applications such as compressed sensing or super-resolution. Code available at http://lts2www.epfl.ch/people/gilles/softwares.

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Type
research article
DOI
10.1137/120902586
ArXiv ID

1212.3268

Author(s)
Puy, Gilles  
Vandergheynst, Pierre  
Date Issued

2014

Published in
SIAM Journal on Imaging Sciences
Volume

7

Issue

1

Start page

128

End page

156

Subjects

compressed sensing

•

inverse problem

•

non-convex optimization

•

robust image alignment

•

super-resolution

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
LTS2  
Available on Infoscience
December 13, 2012
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/87414
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