Chapter 3: Vehicle-Mounted GPR System for Landmine Detection
Chapter 3: Vehicle-Mounted GPR System for Landmine Detection
Chapter 3: Vehicle-Mounted GPR System for Landmine Detection
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42 3. <strong>Vehicle</strong>-<strong>Mounted</strong> <strong>GPR</strong> <strong>System</strong> <strong>for</strong> <strong>Landmine</strong> <strong>Detection</strong><br />
⎧ th1<br />
= 0.2<br />
⎪ th2<br />
= 0.4<br />
⎨<br />
⎪ th3<br />
= 0.6<br />
⎪<br />
⎩ th4<br />
= 0.8<br />
, (3.15)<br />
i.e., the distribution is divided into five classes with the same widths. The image of<br />
confidence ratings is shown in Fig. 3.19. The two landmine models successfully are<br />
rated as 100 % confidence, and the stone is as 50 %. The stone has a curved surface,<br />
thus the back scattering might not be as strong as <strong>for</strong> the landmine models and it<br />
does not have the tail of the reflection. It might cause a low confidence rating. From<br />
the result, the survey may output three or four false alarms in the left side of the area.<br />
It can be reduced by defining the more appropriate thresholds with stochastic<br />
analyses.<br />
Experimental results of an evaluation test <strong>for</strong> the system are summarized in<br />
Appendix A.<br />
1200<br />
x<br />
Type72<br />
PMN2<br />
900<br />
Stone<br />
300<br />
y<br />
900<br />
700 1600<br />
Fig. 3.13: Layout of the buried landmine models. PMN2 landmine model was<br />
buried erectly.
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