A Multi-Gpu Sources Reconstruction Method for Imaging Applications

Abstract

Abstract-A profile reconstruction method using a surface inverse currents technique implemented on GPU is presented. The method makes use of the internal fields radiated by an equivalent currents distribution retrieved from scattered field information that is collected from multiple incident fields. Its main advantage over other inverse source-based techniques is the use of surface formulation for the inverse problem, which reduces the problem dimensionality thus decreasing the computational cost. In addition, the GPU implementation drastically reduces the calculation time, enabling the development of real time and accurate geometry reconstruction at a low cost.

A Synthetic Aperture Radar (SAR)-Based Technique for Microwave Imaging and Material Characterization

“…If the code is run on a 4-core processor (available in most conventional computers nowadays), calculation time would be reduced to less than 12 s per slice. The use of a Graphics Processing Unit (GPU) could result in 60-80 times speedup, as explained in [9], thus enabling real-time imaging.…”

“…Global minimum of the cost function corresponds to the best fit between the true and the modelled target/object-under-test (OUT). Equivalent currents [9,10], level-set [11], linear sampling method [12], local optimization strategies [13], and global optimization based on evolutionary algorithms [3,14] fall within this second group. As opposed to backpropagation techniques, the strength of model-based inverse scattering lies on the little amount of information needed, being capable of reconstructing the profile accurately using a single frequency and few field-ofviews.…”

A Semi-Analytical Method to Calculate the Entries of the Method of Moments Matrix for the Mixed Potential Integral Equation of a Source Reconstruction Problem

“…This method is shown to have the capability of reproducing the original radiation pattern accurately in every direction. [25] explains a new accelerator scheme for the source reconstruction method to determine the metallic parts of the structure under test by using more than one GPU's. In the following references, the dual-integral equation formulation is used.…”