Super-resolution refers to the resolution which is better than the Rayleigh Criterion. Tomographic techniques can provide super-resolution from a full viewing angles of target data collection. However, resolution tends to degrade to the Rayleigh resolution with limited viewing angles data collection.
Spectral estimation is another method by which super-resolution can be achieved.
However, they do not take multiple scattering effects into account. In the DBIM, the background medium is not constrained to be homogeneous and is updated at each iteration. The super-resolution phenomenon in nonlinear inverse scattering has been reported previously using numerically simulated data. The phenomenon was attributed to the multiple scattering effect within an inhomogeneous body. Multiple scattering converts evanescent waves into propagating ones and vice versa.