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Parameter feature extraction for hyperspectral detection of the shallow underwater target

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Abstract

For the detection of shallow underwater targets by the hyperspectrum, the information of the target is carried in the water-leaving radiation. However, the differences between the water-leaving radiation of the underwater target and the ocean background radiation are not significant, and the spectrum of the water-leaving radiation is sensitive to the changes of the marine environment. Therefore, taking the spectrum as the feature is not stable for hyperspectral detection of the underwater target. In this paper, we propose a parameter feature extraction method for hyperspectral detection of the shallow underwater target. The presence of an underwater target would change the optical properties of seawater in a local place. Based on that, a quasi-analytical model of the water-leaving radiation is adopted to inverse the properties of the marine environment from the radiated spectrum. Then the inversed water depth and bottom reference reflectance are taken as the features. Simulation results show that the samples which belong to the water-leaving radiation of underwater target have higher inversed depth and reference reflectance than that belong to the ocean background radiation. Furthermore, these two kinds of samples can be separated significantly and stably in a 2-dimension feature space.

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Authors and Affiliations

  1. Acoustic Science and Technology Laboratory, Harbin Engineering University, Harbin, 150001, China

    Zhi Xia

  2. College of Underwater Acoustic Engineering, Harbin Engineering University, Harbin, 150001, China

    Zhi Xia

  3. School of Electronics and Information Engineering, Harbin Institute of Technology, Harbin, 150001, China

    YanFeng Gu

Authors
  1. Zhi Xia
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  2. YanFeng Gu
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Correspondence to YanFeng Gu.

Additional information

This work was supported by National Natural Science Foundation of Key International Cooperation of China (Grant No. 61720106002) and National Key R&D Program of China (Grant No. 2017YFC1405100).

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Xia, Z., Gu, Y. Parameter feature extraction for hyperspectral detection of the shallow underwater target. Sci. China Technol. Sci. 64, 1092–1100 (2021). https://doi.org/10.1007/s11431-020-1723-6

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  • DOI: https://doi.org/10.1007/s11431-020-1723-6

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