Image Processing Reference
In-Depth Information
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Figure 9.6 IPS010 target configuration: (a) Target object IPS010 geometry, (b) Born reconstruction, (c) mini-
mum phase, and (d) cepstral reconstruction.
9.2 InStItut FReSnel dAtA ReSultS
The Institut Fresnel data come from a series of laboratory controlled experi-
ments performed at the Institut Fresnel (Belkebir and Saillard, 2001, 2005),
with the same idea of providing a means to help groups evaluate and improve
their inverse scattering algorithms. The experimental setup consists of a fixed
transmitting antenna and a moving receiving antenna which can move on
a circular rail around the object corresponding to the Cartesian coordinate
system as shown in Figure 9.8. The transmitting antenna illuminates the
target(s) from various locations equidistant around the object. The antennas
are located at a distance of 1.67 m from the center of experimental setup. More
details about these experimental data can be found in Ayraud et al. (n.d.).
Figure 9.9 shows the schematic representation of the cross sections of
the actual target objects with respect to the source and receiver. The scat-
tered field was provided for a range of illumination frequencies and angles.
For FoamDielInt and FoamDielExt (the notation for data sets), the emitting
antenna was placed at eight different locations which were 45° apart, whereas
for FoamTwinDiel and FoamMetExt, which are more complicated objects, the
emitting antenna was positioned at 18 locations with 20° angular intervals.
The receiving antenna collected complex data at 1° intervals. The scattering
experiment was conducted using nine operating frequencies, which range
from 2 GHz to 10 GHz. The data is first normalized and then used to compute
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