Super resolution phenomenon in the detection of buried objects

In this work, we will study the resolution of image quantitatively and the physical reason for super-resolution phenomenon. The study has demonstrated that the information of evanescent waves in the measurement data and involved in the inversion algorithms is the main reason for super resolution This is because high spatial frequency components of the object axe contained in the evanescent waves. Four inversion algorithms are considered to study the super-resolution phenomenon in the half-space problem: the diffraction tomographic algorithm, the Born approximation method, the Born iterative method and the distorted Born iterative method.