In the project, we have developed a level-set based shape reconstruction algorithm in 2D for imaging buried objects from limited-view multi-frequency cross-borehole electromagnetic data.
A.) Here is an example with full view to the scenery. Electromagnetic
sources and receivers completely surround the domain of interest. The
object to be reconstructed is shown in the figure below.
The level set based shape evolution is shown next. Notice
that the 'hole' in the house is recovered without any problems by the method.
B.) Here is a geophysical example with limited view. Given cross-borehole EM data, the three buried objects need to be reconstructed. Here, due to the limited view to the domain of interest, the main difficulty is to separate the two upper objects from each other.
1. 'A shape reconstruction method for electromagnetic tomography using adjoint fields and level sets', to appear in Inverse Problems, special issue on 'Electromagnetic Imaging and Inversion of the Earth's Subsurface', October 2000 issue (Invited Paper).
2. 'Shape reconstruction in 2D from limited-view multifrequency electromagnetic data' (accepted for publication)
The levelART algorithm
An example with full view:
A cross-borehole example with limited view:
This page was created on 28 April 2000 and last changed on 28 April 2000..