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    基于SCNP-1DCNN-DRS网络模型的高光谱遥感岩性识别

    Lithology identification through hyperspectral remote sensing based on the SCNP-1DCNN-DRS network model

    • 摘要: 基于高光谱遥感图谱合一的优势,结合深度学习技术强大的学习能力,文章提出了基于深度学习的高光谱遥感岩性识别方法,以进一步提升其岩性填图的质量和效率。该文在综合分析已有高光谱遥感岩性分类方法优缺点基础上,基于岩性填图的地质属性特点,提出了一种应用精度更高的面向卫星高光谱遥感的岩性填图模型,该网络模型不仅继承了一维卷积神经网络(1D convolutional neural network,1DCNN)在岩性填图中所展现出的独特高效性与实用性,而且针对传统1DCNN岩性填图结果中存在大量孤立噪点和边界识别不准确这一弊端,在网络中设计了邻域像素光谱关联性(spectral correlation of neighboring pixels,SCNP)学习策略; 另外,在网络中增加了深度残差收缩网络(deep residual shrinkage,DRS)去噪模块,进一步抑制卫星高光谱影像噪声,并减少冗余信息的影响。经实验验证,所提出的SCNP-1DCNN-DRS网络模型的样本测试总体精度高达99.89%,全影像测试总体精度也可达83.41%,与其他方法对比,所提模型在全影像测试中精度最高,表明其在岩性填图实践中更具应用潜力。

       

      Abstract: Hyperspectral remote sensing enables the simultaneous capture of spatial and spectral information. Based on this advantage and in combination with the significant learning capacity of deep learning technology, this study proposed a deep learning-based hyperspectral remote sensing approach for lithology identification, aiming to further enhance the quality and efficiency of lithologic mapping. Through a comprehensive analysis of the merits and demerits of existing lithology classification methods based on hyperspectral remote sensing and taking into account the geological attributes in lithologic mapping, this study proposed a higher-precision lithologic mapping model tailored to satellite hyperspectral remote sensing-SCNP-1DCNN-DRS. While inheriting the outstanding efficiency and feasibility possessed by the one-dimensional convolutional neural network (1DCNN) in lithologic mapping, the proposed SCNP-1DCNN-DRS network model introduced the learning strategy of spectral correlation of neighboring pixels (SCNP) to overcome the limitations of 1DCNN in lithologic mapping, such as the presence of numerous isolated noise pixels and imprecise boundary delineation. Additionally, a deep residual shrinkage (DRS) denoising module was integrated into the network to further mitigate the impacts of noise and redundant information in satellite hyperspectral images. Experimental validation demonstrates that the SCNP-1DCNN-DRS network model yielded an overall sample testing accuracy of 99.89% and an overall full-image testing accuracy of 83.41%. Compared to other models, the SCNP-1DCNN-DRS network model exhibits the highest accuracy in full-image testing, indicating its great application potential in lithologic mapping practices.

       

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