The reconstruction of time domain through-wall imaging for a metallic cylinder. (February 2015)

• Record Type: Journal Article
• Authors: Wan, Y.; Yu, C-Y.; Sun, C-H.; Chiu, C-C.
• Is Part Of: Imaging science journal. Volume 63:Number 2(2015)
• Page Start: 81
• Page End: 84
• Publication Date: 2015-02
• Subjects: Imaging systems -- Periodicals; 621.36705
• DOI: 10.1179/1743131X14Y.0000000084
• Languages: English
• ISSNs: 1368-2199

Abstract

<abstract> <title> <x content-type="archive" xml:space="preserve">Abstract</x> </title> <p>Shape reconstruction from scattered electromagnetic fields is considered for two-dimensional through-wall imaging (TWI). The finite-difference time-domain method is applied to calculate the scattered <italic>E</italic> fields for forward scattering. Inverse scattering problems are transformed into optimisation problems based on the scattered <italic>E</italic> fields. A dynamic differential evolution (DDE) stochastic searching algorithm for shape reconstruction of a two-dimensional conducting target hidden behind a homogeneous building wall is demonstrated using simulated backscattered fields. The DDE is a population-based optimisation approach that aims to minimise the objective function between mimic measurements and computer-simulated data. Thus, the shape of a metallic cylinder can be obtained by minimising the objective function. Simulations show that DDE can successfully reconstruct TWI for a metallic cylinder. In addition, the effect of Gaussian noise on the reconstruction is investigated.</p> </abstract>