Seafloor identification in sonar imagery via simulations of Helmholtz equations and discrete optimization
Seafloor identification in sonar imagery via simulations of Helmholtz equations and discrete optimization
复制标题
通过模拟亥姆霍兹方程和离散优化来识别声纳图像中的海底
DOI:
10.1016/j.jcp.2017.03.004
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发表时间:
2017
影响因子:
4.1
通讯作者:
Zhou, Haomin
中科院分区:
文献类型:
--
作者:
Engquist, Björn;Frederick, Christina;Huynh, Quyen;Zhou, Haomin
We present a multiscale approach for identifying features in ocean beds by solving inverse problems in high frequency seafloor acoustics. The setting is based on Sound Navigation And Ranging (SONAR) imaging used in scientific, commercial, and military applications. The forward model incorporates multiscale simulations, by coupling Helmholtz equations and geometrical optics for a wide range of spatial scales in the seafloor geometry. This allows for detailed recovery of seafloor parameters including material type. Simulated backscattered data is generated using numerical microlocal analysis techniques. In order to lower the computational cost of the large-scale simulations in the inversion process, we take advantage of a pre-computed library of representative acoustic responses from various seafloor parameterizations.
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