针对遥感图像自然地貌边缘的像素点归类问题,提出融合边缘检测模块的多通道融合模型与解码器端模块模型。边缘检测模块以Canny算子为基础进行闭运算及均值滤波处理得到精确化的图像边缘。语义分割网络以DeepLabV3+为基础,分别从编码器...针对遥感图像自然地貌边缘的像素点归类问题,提出融合边缘检测模块的多通道融合模型与解码器端模块模型。边缘检测模块以Canny算子为基础进行闭运算及均值滤波处理得到精确化的图像边缘。语义分割网络以DeepLabV3+为基础,分别从编码器及解码器端并联边缘计策模块。实验结果表明,改进后的2种网络相比原DeepLabV3+网络在高分辨率自然地貌图像数据集上均取得更好的分割效果,且解码器端融合网络取得了最高72.60%的交互比(IoU,intersection over union)和86.64%的F1score,可用于面向自然地貌的识别与分割。展开更多
Threshold is a limit and marginal point when a qualitative change takes place. Since threshold principle was firstly used in landform research by S.A.Schumm in the 1970s, the quantitative research on watershed landfor...Threshold is a limit and marginal point when a qualitative change takes place. Since threshold principle was firstly used in landform research by S.A.Schumm in the 1970s, the quantitative research on watershed landform development stage has come true. Davis proposed a three-stage model on landform evolution: young, mature and old stages. Thereafter Strahler quantified this model by hypsometric analysis method. The authors thought that the material movement stage cannot be expressed by hypsometric method in watershed landform at development stage, because of the uncertainty on stage delimitation. To meet this shortcoming, this paper presents an integral erosion value method. A clear delimitation on landform development stage in the Loess Plateau region has been tested by this method. The result shows that gullied loessial hilly area is at the mature stage, and gullied loessial tableland area is at the young stage. It is estimated that from the point of erosion related sediment yield, natural erosion accounts for 70% of the total erosion amount, and artificial accelerating erosion is 30%. Therefore soil and water conservation is very crucial for the Loess Plateau.展开更多
文摘针对遥感图像自然地貌边缘的像素点归类问题,提出融合边缘检测模块的多通道融合模型与解码器端模块模型。边缘检测模块以Canny算子为基础进行闭运算及均值滤波处理得到精确化的图像边缘。语义分割网络以DeepLabV3+为基础,分别从编码器及解码器端并联边缘计策模块。实验结果表明,改进后的2种网络相比原DeepLabV3+网络在高分辨率自然地貌图像数据集上均取得更好的分割效果,且解码器端融合网络取得了最高72.60%的交互比(IoU,intersection over union)和86.64%的F1score,可用于面向自然地貌的识别与分割。
文摘Threshold is a limit and marginal point when a qualitative change takes place. Since threshold principle was firstly used in landform research by S.A.Schumm in the 1970s, the quantitative research on watershed landform development stage has come true. Davis proposed a three-stage model on landform evolution: young, mature and old stages. Thereafter Strahler quantified this model by hypsometric analysis method. The authors thought that the material movement stage cannot be expressed by hypsometric method in watershed landform at development stage, because of the uncertainty on stage delimitation. To meet this shortcoming, this paper presents an integral erosion value method. A clear delimitation on landform development stage in the Loess Plateau region has been tested by this method. The result shows that gullied loessial hilly area is at the mature stage, and gullied loessial tableland area is at the young stage. It is estimated that from the point of erosion related sediment yield, natural erosion accounts for 70% of the total erosion amount, and artificial accelerating erosion is 30%. Therefore soil and water conservation is very crucial for the Loess Plateau.
