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    双重注意力下的多尺度残差遥感图像去雾网络

    Multi-scale residual dehazing network for remote sensing images based on dual attention

    • 摘要: 由于雾霾会影响所捕获遥感图像的质量,同时限制后端视觉应用的性能,因而文章提出一种双重注意力多尺度残差去雾网络。首先,重建大气散射模型,可结合大气光值与透射率求取大气光幂; 然后,利用端到端的深度学习模型完成遥感图像去雾,该网络包含浅层特征提取模块、深层数据提取模块、双映射网络和平行卷积重建模块; 最后,将该文方法与CARL-net,DFAD-net,SRBFP-net和AMGP-net这4种方法进行主客观对比实验。结果表明: 双重注意力多尺度残差去雾网络能获得与原始无雾场景较为接近的视觉状态,并具备较优的对比度、鲜亮的色度与相应的饱和度,透射图细节清晰,保持前景部分边缘的同时可实现对图像噪声较好的处理; 相对于CARL-net,DFAD-net,SRBFP-net和AMGP-net,该方法的峰值信噪比和结构相似度指标较优,算法处理效率较快,同时随着遥感雾图分辨率增加,算法处理时间变化较稳定。

       

      Abstract: Hazes reduce the quality of remote sensing images while limiting the performance of back-end visual applications. Hence, this study proposed a multi-scale residual dehazing network based on dual attention. First, an atmospheric scattering model was constructed to combine the atmospheric light value and transmissivity to derive the atmospheric power of light. Second, an end-to-end deep learning model was used to clarify remote sensing images with hazes. The dehazing network consists of a shallow feature extraction module, a deep data extraction module, a dual mapping network, and a parallel convolution reconstruction module. Finally, the proposed dehazing network was compared with CARL-net, DFAD-net, SRBFP-net, and AMGP-net through subjective and objective comparison experiments. The results indicate that the proposed dehazing network obtained a visual state close to the original haze-free scene, exhibiting high contrast, bright chroma, corresponding saturation, and clear transmission map details. Moreover, it effectively removed image noise while maintaining the edge of the foreground part. Compared to the above four networks, the proposed dehazing network achieved superior peak signal-to-noise ratio (PSNR) and structure similarity index measure (SSIM), higher algorithm processing efficiency, and stable algorithm processing time with the increase of image resolution.

       

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