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    • 摘要: 针对现有方法存在道路区域提取间断、不同尺寸道路提取困难和窄小型道路提取错分等问题提出一种融合元素乘法和细节优化的道路提取算法。首先,编码器部分提出元素乘法模块 (IEM模块)来完成特征提取,保留和提取多尺度、多层次的道路特征,采用步长为2的Conv3×3来完成二倍下采样,减少遥感影像在提取过程中的信息丢失,编解码器采用五层结构并进行跳越连接,保持多尺度提取能力的同时提高道路连续性,其次使用PFAAM增加网络输出对于道路的关注度,最后采用精细残差网络 (RRN),增加网络对于边界细节提取能力,细化边界信息。实验在公共道路数据集Massachusetts (CHN6-CUG)上对网络模型进行测试,准确率 (OA)、交并比 (IoU)、平均交并比 (mIoU)和F1等评价指标达到98.06% (97.19%)、64.52% (60.24%)、81.25% (78.66%) 和88.70% (86.85%)。实验结果表明,所提出的方法优于所有的比较方法,能够有效提高道路分割的精确度。

       

      Abstract: To address the existing challenges of discontinuity in road region extraction and difficulty in extracting roads of different sizes, especially the misclassification of narrow roads, a novel road extraction algorithm combining element-wise multiplication and detail optimization was proposed. Firstly, an element-wise multiplication module (IEM module) was introduced in the encoder part to perform feature extraction, preserving and extracting multi-scale and multi-level road features. A Conv3×3 with a stride of 2 was used for twofold downsampling, reducing information loss during the extraction process of remote sensing images. The encoder-decoder was structured with five layers and utilized skip connections to maintain multi-scale extraction capabilities while improving road continuity. Secondly, PFAAM was employed to enhance the network's focus on road features. Finally, a fine residual network (RRN) was utilized to enhance the network's ability to extract boundary details, refining the boundary information. Experiments were conducted on the public road dataset of Massachusetts (CHN6-CUG) to test the network model, achieving evaluation metrics of OA (accuracy), IoU (intersection over union), mIoU (mean IoU), F1-score of 98.06% (97.19%)、64.52% (60.24%)、81.25% (78.66%), and 88.70% (86.85%). The experimental results demonstrated that the proposed method outperformed all the compared methods, effectively improving the accuracy of road segmentation.