A Multi-Scale Weighted Back Projection Imaging Technique for Ground Penetrating Radar Applications
A Multi-Scale Weighted Back Projection Imaging Technique for Ground Penetrating Radar Applications
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DOI：
10.3390/rs6065151
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发表时间：
2014-06
期刊：
影响因子：
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通讯作者：
Wentai Lei;Ronghua Shi;Jian Dong;Y. Shi
中科院分区：
文献类型：
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作者：
Wentai Lei;Ronghua Shi;Jian Dong;Y. Shi
在本文中，我们提出了一种基于多尺度加权反投影（BP）处理的新型探地雷达（GPR）成像技术。首先，利用传统的BP成像技术对整个成像区域进行大尺度离散化，得到低分辨率的成像结果。其次，利用强度检测方法从低分辨率成像结果中勾画出潜在目标区域（PTR）。在PTR中，利用加权BP成像技术实现小尺度离散化并获得更高分辨率的成像结果。通过分析时滞曲线上散射数据的统计特性，设计了权重因子。继续上述“离散化-成像-PTR勾画”处理，直至成像分辨率达到规定要求。在多尺度成像结果中，其他区域的分辨率没有PTR高。与传统BP成像算法相比，该算法能够以更低的计算量获得更高分辨率的成像结果。对该算法进行了仿真，实验结果验证了该方法的可行性。
In this paper, we propose a new ground penetrating radar (GPR) imaging technique based on multi-scale weighted back projection (BP) processing. Firstly, the whole imaging region is discretized by large scale and low-resolution imaging result is obtained by using traditional BP imaging technique. Secondly, the potential targets regions (PTR) are delineated from low-resolution imaging result by using intensity detection method. In the PTR, small scale discretization is implemented and higher resolution imaging result is obtained by using weighted BP imaging technique. A weight factor is designed by analyzing the statistical characteristics of scattering data on the time-delay curve. The above “discretization-imaging-PTR delineation” processing continues until the imaging resolution reaches the specified requirement. In the multi-scale imaging result, the resolution in other regions is not as high as that in PTR. This algorithm can get higher resolution imaging results with much lower computation compared with traditional BP imaging algorithm. The simulation of this algorithm is processed and experimental results validate the feasibility of this method.