Shape-gradient optimization applied to the reconstruction of 2-D and 3-D metallic objects
Résumé
A shape-gradient optimization based on contour deformations by means of Level Set method is used for reconstructing 2-D and 3-D perfectly conducting objects electromagnetic imaging. A frequency hopping technique is applied during the inverse scattering procedure for first locating the objects and reconstruct them roughly, then with higher frequencies to allow finer details to be retrieved. The numerical results clearly show that the inversion algorithm yields to accurate reconstruction of one or several objects even with noise-contaminated data and limited coverage of the incident fields.
Mots clés
2D metallic objects reconstruction
shape-gradient optimization
3D metallic objects reconstruction
contour deformations
perfectly conducting objects electromagnetic imaging
level set method
inverse scattering
Frequency
frequency hopping technique
Inverse problems
electromagnetic wave scattering
Cost function
Level set
Image reconstruction
Electromagnetic scattering
Optimization methods
Iterative algorithms
Telecommunications
Goniometers