Publications related to Global surveillance

Opacité et transparence dans le design d'un dispositif de surveillance urbain : le cas de l'IMSI catcher

This thesis assesses the surveillance operated on the mobile phone network by governmental actors (intelligence agencies, police, army) and the relationship between monitored spaces and their users. Indeed, some new surveillance devices used by intelligenc ...

EPFL2022

On global regularity for systems of nonlinear wave equations with the null-condition

Joachim Krieger, Aparajita Dasgupta, Can Gao

In this note we combine a recent result by Geba [2] on the local wellposedness theory of systems of nonlinear wave equations with

Q_0

null-form structure with the classical Penrose compactification method to obtain a new small data global existence resul ...

International Press2015

Secret Communication Over Broadcast Erasure Channels With State-Feedback

Christina Fragouli, Suhas Diggavi, László Czap, Vinod Malathidevi Prabhakaran

We consider a 1-to-K communication scenario, where a source transmits private messages to K receivers through a broadcast erasure channel, and the receivers feedback strictly, causally, and publicly their channel states after each transmission. We explore ...

Ieee-Inst Electrical Electronics Engineers Inc2015

Individual activity-travel analysis based on smartphone WiFi data

Amélie Buisson

The mobility patterns of the population are the basis of most analyses in the transportation field. We aim to extract these patterns from smartphone traces. The following thesis proposes a Bayesian approach based on smartphone location records, land use in ...

2014

MediaEval 2014 Visual Privacy Task: Geometrical Privacy Protection Tool

Touradj Ebrahimi

This paper describes EPFL privacy protection tool for the MediaEval 2014 Visual Privacy task. The goal of the task is to obscure faces, body silhouettes, and personal items of people in the provided surveillance clips to preserve their personal privacy. Th ...

2014

Least-Squares Fitting of Time-Domain Signals for Fourier Transform Mass Spectrometry

Yury Tsybin, Anton Kozhinov, Tagir Aushev

To advance Fourier transform mass spectrometry (FTMS)-based molecular structure analysis, corresponding development of the FTMS signal processing methods and instrumentation is required. Here, we demonstrate utility of a least-squares fitting (LSF) method ...

Springer2014

MediaEval 2013 Visual Privacy Task: Warping-based Privacy Protection Tool

Touradj Ebrahimi

In this paper, we describe EPFL privacy protection tool submitted to the MediaEval 2013 Visual Privacy task. The goal of the task is to obscure faces and other personal items of people in the provided surveillance clips to preserve their personal privacy. ...

2013

MediaEval 2012 Visual Privacy Task: Applying Transform-domain Scrambling to Automatically Detected Faces

Touradj Ebrahimi, Aleksei Triastcyn

In this paper, we describe our approach and discuss evaluation results for the MediaEval 2012 Visual Privacy task. The goal of the task is to obscure faces of people visible in provided surveillance clips to preserve their personal privacy. We also additio ...

2012

Exploiting Multi-Temporal Information for SAR Image Segmentation

Jean-Philippe Thiran, Meritxell Bach Cuadra, François Aspert

Earth observation is taking more and more importance in our society. Indeed, recent technologies march allows for satellite images to get ground resolution up to less than one meter. Thus, most of satellite image information obtained begins now to be widel ...

2006

Global surveillance

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Opacité et transparence dans le design d'un dispositif de surveillance urbain : le cas de l'IMSI catcher

On global regularity for systems of nonlinear wave equations with the null-condition

Secret Communication Over Broadcast Erasure Channels With State-Feedback

Individual activity-travel analysis based on smartphone WiFi data

MediaEval 2014 Visual Privacy Task: Geometrical Privacy Protection Tool

Least-Squares Fitting of Time-Domain Signals for Fourier Transform Mass Spectrometry

MediaEval 2013 Visual Privacy Task: Warping-based Privacy Protection Tool

MediaEval 2012 Visual Privacy Task: Applying Transform-domain Scrambling to Automatically Detected Faces

Exploiting Multi-Temporal Information for SAR Image Segmentation

Individual activity-travel analysis based on smartphone WiFi data

Exploiting Multi-Temporal Information for SAR Image Segmentation

Opacité et transparence dans le design d'un dispositif de surveillance urbain : le cas de l'IMSI catcher

MediaEval 2012 Visual Privacy Task: Applying Transform-domain Scrambling to Automatically Detected Faces

Secret Communication Over Broadcast Erasure Channels With State-Feedback

On global regularity for systems of nonlinear wave equations with the null-condition

MediaEval 2014 Visual Privacy Task: Geometrical Privacy Protection Tool

Least-Squares Fitting of Time-Domain Signals for Fourier Transform Mass Spectrometry

MediaEval 2013 Visual Privacy Task: Warping-based Privacy Protection Tool