Inverse Problems and Machine Learning
Date: April 11, 2019
Time: 2:30PM - 3:30PM
Location: Blocker 628
Speaker: Dr. Leonid Kunyansky, University of Arizona
Title: Sparsity-based techniques for hybrid imaging modalities with band-limited measurements
Abstract: Several novel hybrid imaging modalities require generating or measuring sound waves. 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 a strong distortion of reconstructed images. We will investigate the use of sparsity inducing techniques such as the level set methods and L1-regularization to overcome this problem. (Joint work with N.Do and P.Hoskins)