Graduate Student / Postdoc Seminar

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From Seismology to Compressed Sensing and Back, a Brief History of Optimization-Based Signal Processing

Speaker: Carlos Fernandez-Granda

Location: Warren Weaver Hall 1302

Date: Friday, October 7, 2016, 1 p.m.

Synopsis:

In this talk we provide an overview of the history of l1-norm minimization applied to underdetermined inverse problems. In the 70s and 80s geophysicists proposed using l1-norm minimization for deconvolution from bandpass data in reflection seismography. In the 2000s, inspired by this approach and by magnetic resonance imaging, a method to provably recover sparse signals from random projections, known as compressed sensing, was developed. Theoretical insights used to analyze compressed sensing have recently been adapted to understand the potential and limitations of l1-norm minimization for deterministic problems. These include super-resolution from low-pass data and the deconvolution problem that originally motivated the geophysicists.