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首页> 外文期刊>IEEE Transactions on Geoscience and Remote Sensing >Efficient low-frequency inversion of 3-D buried objects with large contrasts
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Efficient low-frequency inversion of 3-D buried objects with large contrasts

机译：具有较大对比度的3-D埋入物体的有效低频反转

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摘要

An efficient inversion method is proposed using Cui et al.'s high-order extended Born approximations to reconstruct the conductivity object function of three-dimensional dielectric objects buried in a lossy Earth. High-order solutions of the object function are obtained, which have closed-form relations to the linear inverse-scattering solution. Because such relations can be evaluated quickly using the fast Fourier transform, the high-order solutions have similar simplicity as the linear inversion. When the contrasts of buried objects are large, the high-order solutions are much more accurate due to the approximate consideration of multiple-scattering effects within the objects. Hence, good-resolution images can be obtained for large-contrast objects using the new method by only solving a linear inverse problem. Numerical experiments have shown the validity and efficiency of the proposed method.
机译：提出了一种有效的反演方法，该方法利用Cui等人的高阶扩展Born近似来重建埋藏在有损地球中的三维电介质物体的电导率物体函数。获得了目标函数的高阶解，该解与线性逆散射解具有闭合形式的关系。因为可以使用快速傅立叶变换快速评估这种关系，所以高阶解与线性反演具有相似的简单性。当掩埋物体的对比度较大时，由于近似考虑了物体内的多重散射效应，因此高阶解更加准确。因此，仅通过解决线性逆问题，就可以使用新方法获得大对比度对象的高分辨率图像。数值实验表明了该方法的有效性和有效性。

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