Clutter Reduction and Detection of Landmine Objects in Ground Penetrating Radar (GPR) Data Using Singular Value Decomposition (SVD) Dr. Galal Nadim.

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Clutter Reduction and Detection of Landmine Objects in Ground Penetrating Radar (GPR) Data Using Singular Value Decomposition (SVD) Dr. Galal Nadim

First algorithm The SVD is used directly after mean subtraction method. Then a threshold is applied to separate the target signal from the clutter. The success of this method relies on the choice of optimum threshold value. A new formula has been developed to obtain an optimum threshold value. The SNR have been analyzed and compared, before and after the application of this algorithm

Second algorithm The target signal has been estimated using two methods. In the first method, the background is estimated from the data after SVD and then the target is calculated by subtracting this background from the data. In the second method, the target is calculated directly from the data after SVD. The SNR is analyzed in both cases

A scans in the presence (dashed) and absence (solid) of a mine, DeTeC and IESK data, respectively.

B-Scans of Type 72 Non-Metallic mine at depth 10cm buried in earth and LI Anti-personnel mine at depth 10cm in sand

B-Scans of two targets at depth 3 and 10cm, respectively.

The data after applying the mean subtraction method for IESK and DeTeC data, respectively.

The B-Scans after applying the developed threshold formula to the IESK and DeTeC data, respectively

The clutter estimation by using the following equation for IESK and DeTeC data, respectively. whereis the background estimation

The target estimation by subtract the clutter estimation from the data by using the following equation, for IESK and DeTeC data, respectively X original data and is the estimated target signal

The target estimation by using the following equation, for IESK and DeTeC data, respectively.

Normalized Eigenvalues vs. Eigenvectors of SVD for IESK and DeTeC data, respectively

P SNR SNR SNR in First and second row are SNR before and after threshold P is the number of the first modes of the original signal for SVD according to the given equation

X’ modesM1M1+M3M1+M3:4M1+M3:5M1+M3:6M1+M3:8 MSE 8.3       MSE for different X’ modes Ranking of SVD components shows that the background information and the target information contained in the first and second components respectively On the other hand, when mean subtraction method has been used; the first component contains the target information. The threshold has been employed to improve the SNR, where a new developed. formula was used to calculate the threshold Even with changing the type of targets, depth of targets, target size, type of soil, and type of radar systems, the algorithm is still valid. All these parameters are well known to affect the detection of landmine.