Multi-Modal Probabilistic Indoor Localization on a Smartphone

Co-authors

Frederike Dümbgen, Cynthia Oeschger, Mihailo Kolundzija, Emmanuel Girardin, Johan Leuenberger and Serge Ayer.


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Full text: Infoscience.
Cite: .
Code: Will appear shortly.


Abstract

The satellite-based Global Positioning System (GPS) provides robust localization on smartphones outdoors. In indoor en- vironments, however, no system is close to achieving a similar level of ubiquity, with existing solutions offering different trade-offs in terms of accuracy, robustness and cost.

In this paper, we develop a multi-modal positioning system, targeted at

Bound and conquer: Improving triangulation by enforcing consistency

Co-authors

Alireza Ghasemi and Martin Vetterli.


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Full text: View at publisher, Infoscience.
Cite: Bibtex.
Code: Code ocean.


Abstract

We study the accuracy of triangulation in multi-camera systems with respect to the number of cameras. We show that, under certain conditions, the optimal achievable reconstruction error decays quadratically as more cameras are added to the system. Furthermore, we analyse the error decay-rate of major state-of-the-art algorithms with

Sampling and Reconstruction of Bandlimited Signals with Multi-Channel Time Encoding

Co-authors

Karen Adam and Martin Vetterli.


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Preprint: Arxiv, Infoscience.
Cite: Bibtex.
Code: Infoscience.


Abstract

Sampling is classically performed by recording the amplitude of the input at given time instants; however, sampling and reconstructing a signal using multiple devices in parallel becomes a more difficult problem to solve when the devices have an unknown shift in

Embedded polarizing filters to separate diffuse and specular reflection

Co-authors

Laurent Jospin and Gilles Baechler.


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Full text: View at publisher, Arxiv.
Cite: Bibtex.
Code: Will appear shortly.


Abstract

Polarizing filters provide a powerful way to separate diffuse and specular reflection; however, traditional methods rely on several captures and require proper alignment of the filters. Recently, camera manufacturers have proposed to embed polarizing micro-filters in front of the sensor, creating a mosaic of pixels

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