Hough transformation based ground penetrating radar target extraction method and device
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A target extraction, ground penetrating radar technology, applied in radar signal processing and digital image processing, ground penetrating radar underground target recognition and extraction fields
Active Publication Date: 2016-02-24
WUHAN UNIV
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[0007] The object of the present invention is to provide a ground penetrating radar target extraction method and device based on Hough transform, to solve the related problems of ground penetrating radar target extraction and recognition, through a series of methods such as signal processing, digital image processing, graphic recognition to obtain underground Spatial location information of the target
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Embodiment 1
[0107] figure 1 It is a flow chart of a method for extracting ground-penetrating radar targets based on Hough transform provided by the present invention. Such as figure 1 Shown, a kind of ground-penetrating radar target extraction method based on Hough transform described in the present invention, obtains N column A-Scan echo signals to form two-dimensional gray scale image B-Scan, then obtains by analyzing and processing the data of B-Scan The target location information specifically includes the following steps:
[0108] Step S1, preprocessing and normalizing the acquired N columns of A-Scan echo signal data;
[0109] Step S2, sliding translation filtering;
[0110] Step S3, determining the peak and valley of the modulus maximum value;
[0111] Step S4, extracting a hyperbola based on Hough transform;
[0112] Step S5, calculating the position of the measured object.
[0113] The invention solves the related problems of ground penetrating radar target extraction and r...
Embodiment 2
[0178] The device embodiment 2 and the method embodiment 1 of the present invention belong to a unified technical concept. Please refer to the method embodiment 1 for details not described in detail in the device embodiment 2.
[0179] Figure 10 : the structure diagram of a ground penetrating radar target extraction device based on Hough transform provided by the invention. Such as Figure 10 As shown, a ground penetrating radar target extraction device based on the Hough transform of the present invention is used to obtain N columns of A-Scan echo signals to form a two-dimensional grayscale image B-Scan, and then analyze and process the B-Scan The data to obtain the target location information, specifically including the following units:
[0180] A data preprocessing unit, used for preprocessing and normalizing the acquired N columns of A-Scan echo signal data;
[0181] A filtering and denoising unit, used for sliding translation filtering;
[0182] The peak and valley a...
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Abstract
The invention discloses a Hough transformation based ground penetrating radar target extraction method and device. According to the method, a target echo signal is collected by using an independently-developed ground penetrating radar model machine, zero alignment is carried out according to the features of radar echo, and then a sliding translation filter is adopted to lower echo image noise caused by power supply noise of the radar model machine; and one the basis, wavelet transformation is adopted to analyze the noise features of the echo, important information including the wave crest and wave trough of the target echo can be detected by setting the threshold, and finally Hough transformation is adopted to extract the hyperbolic curve of the target, thus obtaining the spatial position information of the target. According to the invention, the radar echo signal is processed by adopting wavelet transformation, so that useful information in the signal can be strengthened and guarantee is provided for the reliability of subsequent processing fundamentally; furthermore, the improved hyperbolic Hough transformation effectively improves the extraction precision, greatly reduces the calculated quantity and is suitable for engineering application.
Description
technical field [0001] The invention relates to the technical field of ground penetrating radar underground target identification and extraction, in particular to the technical field of radar signal processing and digital image processing, and in particular to a method and device for extracting ground penetrating radar targets based on Hough transform. Background technique [0002] Ground penetrating radar is a new type of detection equipment for non-destructive detection of shallow underground targets. It transmits high-frequency broadband electromagnetic waves through the transmitting antenna, and the receiving antenna receives the echo signal, and finally infers the structure of the underground medium through the analysis of the echo. Due to the differences in the electromagnetic properties of different underground media, strong echoes are generated when radar waves reach the interface of the media. According to the travel time, amplitude, and phase information of the ech...
Claims
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