Rapid microwave imaging method

Abstract

The invention discloses a rapid microwave imaging method. In each iteration process of a DBIM algorithm, an inversion speed is improved by calling an efficient forward problem solver to calculate a forward problem. Meanwhile, in order to enable a whole inversion algorithm to stably carry out iterative inversion, a truncated singular value decomposition (TSVD) technology is adopted, and a large number of numerical tests are prevented from being used for determining regularization terms. In order to further reduce a calculated amount, in a cost function of an inversion algorithm, an incident field is used to replace a total field. Therefore, the method can achieve quick and stable inversion, and an inversion speed and quality of an image are ensured.

Description

technical field

[0001] The invention belongs to the technical field of microwave imaging and provides a fast microwave imaging method. Background technique

[0002] Microwave imaging technology is based on the research of microwave propagation and scattering in various complex media, and reconstructs the complex permittivity image inside the measured medium by measuring the scattered field data outside the measured medium. The measured scattering field carries a large amount of information about the scatterer. Using the prior knowledge about the scattering target, some characteristics of the scatterer itself can be extracted after appropriate mathematical processing, such as the shape of the scatterer, the dielectric constant distribution etc. Because microwave imaging can realize non-destructive detection of targets, can simultaneously perform geometric imaging and physical imaging of targets, and has high resolution, microwave imaging technology has a wide range of applic...

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