Title :
Electromagnetic imaging of 2-D inhomogeneous dielectric objects by an improved spectral inverse technique
Author :
Kim, Se-Yun ; Choi, Hyun-Chul ; Ra, Jung-Woong ; Lee, Soo-Young
Author_Institution :
Div. of Appl. Phys. & Electron., Korea Inst. Sci. & Technol., Seoul, South Korea
fDate :
3/1/1990 12:00:00 AM
Abstract :
Recent developments in the numerical analysis of inverse scattering problems are reviewed. Derivations are given of inverse scattering algorithms formulated in the configuration and the spectral domains by using moment-method procedures for forward scattering problems in the reverse sequence. Compared with the inversion algorithm in the configuration domain, the separation of physical parameters involved in the spectral inverse scattering formulation helps to find proper regularization methods for the reduction of the noise effect. Fourier series expansion with respect to the field distribution and averaging process in each enlarged cell provides excellent noise reduction performance
Keywords :
Fourier analysis; computerised picture processing; computerised tomography; inverse problems; medical diagnostic computing; microwave imaging; spectral analysis; Fourier series expansion; averaging process; configuration domain; electromagnetic imaging; enlarged cell; field distribution; ill posedness; image reconstruction; inhomogeneous dielectric objects; inverse scattering algorithms; inverse scattering problems; moment-method procedures; noise effect; noise reduction performance; regularization methods; separation of physical parameters; spectral inverse technique; two dimensional objects; Dielectrics; Electromagnetic scattering; Fourier series; Inverse problems; Moment methods; Noise reduction; Numerical analysis; Physics; Pollution measurement; Spatial resolution;
Journal_Title :
Magnetics, IEEE Transactions on
