On the gap between local recovery guarantees in structured compressed sensing and oracle estimates

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• Claire Boyer (Université Pierre et Marie Curie Paris; ENS - Paris)
• Thursday 18 January 2018, 11:00-11:45
• Seminar Room 1, Newton Institute.

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STSW01 - Theoretical and algorithmic underpinnings of Big Data

This is an on-going work with Ben Adcock and Simone Brugiapaglia (Simon Fraser University, Burnaby). First we will introduce a compressed sensing (CS) theory more compatible with real-life applications: we derive guarantees to ensure reconstruction of a structured sparse signal of interest while imposing structure in the acquisition (no Gaussian measurements here…). We will study how far those CS results are from oracle-type guarantees, and we will show that they are similar in terms of the required number of measurements. These results give an insight to design new optimal sampling strategies when realistic physical constraints are imposed in the acquisition.

This talk is part of the Isaac Newton Institute Seminar Series series.

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