Sparsity-based techniques for hybrid imaging modalities with missing low frequencies
Event
Sparsity-based techniques for hybrid imaging modalities with missing low frequencies
Location: Zoom
Presenter: Leonid Kunyansky, Department of Mathematics, University of Arizona
Several novel hybrid imaging modalities rely on propagating
sound waves to deliver spatial information about the
properties of the object. Traditional image reconstruction
techniques assume that an infinitely wide range of acoustic
wavelengths is available. However, commonly utilized
piezoelectric transducers emit/receive only a narrow band of
frequencies, with both very long and very short wavelengths
missing. This leads to strong distortions in the
reconstructed images. We will investigate the use of
sparsity-inducing techniques (such as, for example,
L1-regularization) to overcome this problem.
Zoom: https://arizona.zoom.us/j/91323946045