Sparsity-based techniques for hybrid imaging modalities with missing low frequencies
When
5 p.m., Sept. 24, 2019
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. (Joint work with N.Do and P.Hoskins)