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基于遥感影像增强的林地植被树种分类研究 被引量:1
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作者 查燕萍 龙北平 《测绘技术装备》 2023年第2期17-21,共5页
在基于遥感影像的植被树种提取研究中,受气候、光照等外界因素的影响,导致遥感影像模糊,难以区分树种。为此,本文开展了基于遥感影像增强的林地植被树种分类研究。结合Retinex增强和引导滤波两种方法,增强林地植被树木遥感影像视觉效果... 在基于遥感影像的植被树种提取研究中,受气候、光照等外界因素的影响,导致遥感影像模糊,难以区分树种。为此,本文开展了基于遥感影像增强的林地植被树种分类研究。结合Retinex增强和引导滤波两种方法,增强林地植被树木遥感影像视觉效果、影像颜色及影像边缘细节后,提取增强后影像中林地的线性地形、植被指数和纹理特征,组成特征集输入旋转森林算法中,获取待分类样本的最大可信度值,由此得出林地植被树种分类结果。结果表明,该方法的遥感影像增强性能良好,影像结构相似性均在0.90以上,可显著提升影像视觉效果和质量,清晰呈现山脊和山谷的地形线性特征,实现杉木、油茶树、松树、映山红和草地的分类,Kappa系数高达0.805。 展开更多
关键词 遥感影像 Retinex增强 林地植被 树种分类 植被指数特征 线性地形特征
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Nonlinear morphological characteristics of debris flow in Dongcheng area of Helong,Jilin
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作者 WANG Qian LI Guangjie +2 位作者 WANG Liancheng ZHENG Baigong LIMing 《Global Geology》 2009年第4期221-225,共5页
Helong City is located in the northeastern Changbai Mountain with a poor geological environment,there often occur debris flows,collapses and landslides;especially debris flows restrict the local economic development. ... Helong City is located in the northeastern Changbai Mountain with a poor geological environment,there often occur debris flows,collapses and landslides;especially debris flows restrict the local economic development. Based on fractal theory and the surveying data of 34 debris flows,the authors studied fractal feature of debris flow gully and its various situations of fractal dimensions in different observation scales. The nonlinear relation reveals the development of non-uniformity and self similarity of debris flow gully. 展开更多
关键词 debris flow NONLINEAR fraetal theory self similarity Helong Jilin
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