A novel method for improving imaging techniques in geophysical and material studies

Science Daily  May 7, 2019
Researchers in Japan have developed a method for identifying the location of point-like scatterers based on fluctuations in the physical properties of the surface. They extracted information on the far-field wave properties of the Green’s function by using the so-called “steepest descent path” and “pseudo-projections” methods. Then, the far-field operator was defined based on the near-field observation and the far-field properties of the Green’s function. They used this far-field operator to obtain the indicator functions that determine the position of the scatterers. They successfully demonstrated the reconstruction of densely packed point-like scatterers using the sensor grid with a small network. The framework developed by the researchers could be used to improve the efficiency of tomography for seismic and electromagnetic exploration in geophysics and for nondestructive physical testing of materials…read more. TECHNICAL ARTICLE