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Ground penetrating radar data background removing method based on robust principal component analysis

A technology of ground penetrating radar and data background, applied in the field of ground penetrating radar, can solve the problems of inaccurate estimation and poor robustness of ground penetrating radar data background signal, and achieve high computing accuracy, strong robustness and fast convergence speed. Effect

Inactive Publication Date: 2016-04-27
HARBIN INST OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to solve the problem of inaccurate and poor robustness estimation of ground penetrating radar data background signals by traditional background removal methods, and to provide a ground penetrating radar data background removal method based on robust principal component analysis

Method used

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  • Ground penetrating radar data background removing method based on robust principal component analysis
  • Ground penetrating radar data background removing method based on robust principal component analysis
  • Ground penetrating radar data background removing method based on robust principal component analysis

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specific Embodiment approach 1

[0029] Specific Embodiments 1. A ground-penetrating radar data background removal method based on robust principal component analysis described in this embodiment is carried out in the following steps:

[0030] Step 1: GPR B-SCAN data standardization

[0031] Standardize the GPR B-SCAN data so that the values ​​in the two-dimensional data matrix are in the [-1,1] interval;

[0032] Step 2: Remove DC offset from GPR A-SCAN data

[0033] The ground penetrating radar echo data is often all positive or all negative, indicating that it contains a DC component and needs to be suppressed, and the average value of all A-SCAN data is subtracted from each A-SCAN data;

[0034] Step 3: Use the moving average filter method to remove the random noise of the ground penetrating radar B-SCAN image

[0035] Utilize a sliding window, select the window width as 5 tracks, calculate the mean value of the 5 tracks of A-SCAN data in the window, and use it to replace the A-SCAN data of the middle t...

specific Embodiment approach 2

[0042] Specific embodiment 2. This embodiment is a further description of a ground-penetrating radar data background removal method based on robust principal component analysis described in specific embodiment 1. The ground-penetrating radar B-SCAN data described in step 1 The specific process of standardization is as follows:

[0043] B-SCAN data D is an m×n matrix, and the values ​​of all elements are in the interval [MIN,MAX], then perform the following normalization processing:

[0044] D ( i , j ) - M I N + M A X 2 M I N + M A...

specific Embodiment approach 3

[0046] Specific Embodiment 3. This embodiment is a further description of the background removal method for ground-penetrating radar data based on robust principal component analysis described in specific embodiment 1 or 2. The ground-penetrating radar A-SCAN data described in step 2 The specific process of removing the DC offset is as follows:

[0047] Each column in the GPR B-SCAN data is called an A-SCAN, and the B-SCAN data D is written as a collection of A-SCAN:

[0048] D=[A 1 ,A 2 ,...,A n ]

[0049] where A i =[a i1 ,a i2 ,...,a im ] T Indicates the i-th channel A-SCAN data. Do the following processing for each A-SCAN data:

[0050] A i ′ = A i - 1 m Σ k = 1 m a i k ...

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Abstract

The invention relates to the technical field of ground penetrating radars, in particular to a ground penetrating radar data background removing method based on robust principal component analysis. The ground penetrating radar data background removing method aims to solve the problems of inaccurate estimation of ground penetrating radar data background signals and poor robustness of the traditional background removing method. The ground penetrating radar data background removing method is implemented by the steps of: 1, standardizing ground penetrating radar B-SCAN data; 2, removing DC offset of ground penetrating radar A-SCAN data; 3, adopting a moving average filtering method to remove random noise of a ground penetrating radar B-SCAN image; 4, and removing background through robust principal component analysis. The ground penetrating radar data background removing method has the advantages of achieving good effect and having high robustness by adopting robust principal component analysis, and can be applied to the technical field of ground penetrating radars.

Description

technical field [0001] The invention relates to the technical field of ground penetrating radar, in particular to a ground penetrating radar data background removal method based on robust principal component analysis. Background technique [0002] For the impulse pulse ground-penetrating radar with co-located transceiver antennas, as the radar moves along the horizontal survey line, and continuously transmits broadband electromagnetic waves to the ground, and at the same time receives the reflected signal of the underground target, a set of sampling data can be obtained at each position , called A-SCAN, consists of a series of A-SCAN data to form a two-dimensional ground-penetrating radar echo profile, called a B-SCAN image. Therefore, before the subsequent target detection, recognition and interpretation work, an effective preprocessing method should be used to preprocess the ground penetrating radar data to suppress background interference such as noise and clutter, and to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/41
CPCG01S7/414
Inventor 姜化冰赵彬王勇
Owner HARBIN INST OF TECH
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