Through-Wall Imaging With UWB Radar System - KEMT FEI TUKE
Through-Wall Imaging With UWB Radar System - KEMT FEI TUKE
Through-Wall Imaging With UWB Radar System - KEMT FEI TUKE
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4.3 Highlighting of a Building Contours 72<br />
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0<br />
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W H<br />
0<br />
Part of the<br />
Hanning window<br />
[ rad]<br />
Fig. 4.3.4: Window function WH made up from Hanning window functions.<br />
SAR scanning<br />
Calibration and preprocessing<br />
2D SAR migration<br />
<strong>Wall</strong> and antennas compensation<br />
Merging data from more scans<br />
Image edges detection<br />
Hough Transform<br />
Filtering in Hough space<br />
Inverse Hough Transform<br />
<strong>Imaging</strong> detected building contours<br />
Fig. 4.3.5: Processing steps for imaging of building contours.<br />
Section 4.1, antenna beam compensation (4.1.16), and attenuation losses compensation<br />
(Section 4.3.1) were computed for all the scans.<br />
The migrated images from three scans were merged together (Fig. 4.3.7 b))<br />
and edges were detected (Fig. 4.3.7 c)). The HT was applied (Fig. 4.3.8 a)) and<br />
the peaks in positions close to θw were filtered with a sharp window function WH<br />
(Fig. 4.3.8 b)). The lines that represent the building walls were drawn over the<br />
migrated image after the IHT was performed (Fig. 4.3.8 c)).<br />
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