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Imaging and Sensing (Optimization) Seminar

September 20, 2022 - 3:00pm

Where: 362B (ACS building)

When: 15:00-16:00

 

Speaker: Symeon Papadimitropoulos

 

Title: Imaging in waveguides using physically-informed data-driven techniques

Abstract: Inverse source problems are central to many applications in acoustics, geophysics, non-destructive testing, and more. Traditional imaging methods suffer from the resolution limit, preventing distinction of sources separated by less than the emitted wavelength. In this work we propose a method based on physically-informed neural-networks for solving the source refocusing problem, constructing a novel loss term which promotes super-resolving capabilities of the network and is based on the physics of wave propagation. We demonstrate the approach in the setup of imaging an a-priori

unknown number of point sources in a two-dimensional rectangular waveguide from measurements of wavefield recordings along a vertical cross-section. The results show the ability of the method to

approximate the locations of sources with high accuracy, even when placed close to each other.