Enhanced Ground-Penetrating Radar Inversion With Closed-Loop Convolutional Neural Networks

Meijia Huang;Jieyong Liang;Ziyang Zhou;Xuelei Li;Zhijun Huo;Zhuo Jia
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Abstract

Traditional ground-penetrating radar (GPR) inversion techniques, while capable of providing high-resolution subsurface imaging, suffer from issues, such as heavy reliance on initial models, high computational demands, and sensitivity to noise and data incompleteness. In contrast, deep-learning-based methods excel in feature extraction and model fitting. However, as a data-driven algorithm, the practical application of convolutional neural networks (CNNs) is limited by the quantity of labeled samples. To reduce the dependence of CNN-based GPR inversion methods on observational data and labels, this project proposes an inversion method based on closed-loop CNNs (CL-CNNs). This approach improves inversion accuracy and reduces the ill-posedness of GPR inversion by modeling both the forward and inverse GPR processes. The CL structure increases the number of features that CNNs can learn from limited labeled samples, while the mutual inversion constraints between the forward and inverse subnetworks help alleviate the ill-posedness of the inversion problem, making the inversion results more consistent with geological principles. Research using synthetic data demonstrates that this method outperforms traditional approaches, as evidenced by enhanced structural similarity index (SSIM) and peak signal-to-noise ratio (PSNR), and a significantly lower mean-squared error (mse), highlighting its advanced performance compared with traditional open-loop CNNs (OL-CNNs). Furthermore, applying this method to real measurement data further validates its effectiveness and practical applicability in engineering contexts, emphasizing its significant practical value.
基于闭环卷积神经网络的增强探地雷达反演
传统的探地雷达(GPR)反演技术虽然能够提供高分辨率的地下成像,但存在严重依赖初始模型、计算量大、对噪声和数据不完整敏感等问题。相比之下,基于深度学习的方法在特征提取和模型拟合方面表现出色。然而,卷积神经网络作为一种数据驱动算法,其实际应用受到标注样本数量的限制。为了减少基于cnn的GPR反演方法对观测数据和标签的依赖,本项目提出了一种基于闭环cnn (cl - cnn)的反演方法。该方法通过对探地雷达正逆过程进行建模,提高了反演精度,降低了反演的病态性。CL结构增加了cnn可以从有限的标记样本中学习的特征数量,而正逆子网络之间的相互反演约束有助于缓解反演问题的病态性,使反演结果更符合地质原理。利用合成数据进行的研究表明,该方法优于传统方法,结构相似指数(SSIM)和峰值信噪比(PSNR)均增强,均方误差(mse)显著降低,与传统开环cnn (ol - cnn)相比,其性能更先进。将该方法应用于实际测量数据,进一步验证了其在工程环境中的有效性和实用性,强调了其重要的实用价值。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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