基于RILBP的地形结构尺度稳定特征分析

发布时间：2018-05-24 13:24

本文选题：局部二值模式 + 地形结构　；参考：《地理与地理信息科学》2017年04期

【摘要】：地形结构描述着地表起伏的形态结构,而高低起伏的地形结构又组成了丰富多样的地貌景观。地表形态一般呈现出局部形态相似与区域有序分异的尺度特征。现有的地形尺度研究不能有效地刻画地形结构的尺度特征,地貌形态的适宜表达尺度及地形结构的尺度稳定特征仍值得进一步探讨。该文以黄土高原不同地貌类型区为例,以数字高程模型(DEM)为数据源,从刻画地表形态的局部特征入手,系统地选取了多类具有代表性的地貌形态样本数据,分析了典型地貌类型区域的局部二值模式(LBP)分布特征。考虑到地形结构与RILBP之间一对多的对应关系,利用顾及旋转不变特性的LBP(RILBP)算法探究地形结构的尺度稳定特性,发现随着分析窗口增大,LBP显示出逐渐趋于稳定的尺度特征。研究结果表明,RILBP能够有效地表达地形结构,地形结构稳定单元能够有效地反映适宜的地形分析尺度,地形结构对地形多尺度信息的挖掘具有独特的优势。
[Abstract]:The topographic structure describes the morphological structure of the surface undulation, and the topographic structure of the high and low ups and downs constitutes rich and varied landform landscape. The surface morphology generally presents the scale characteristics of local morphological similarity and regional orderly differentiation. The existing research on topographic scale can not effectively depict the scale characteristics of topographic structure, and the suitable representation scale of geomorphological form and the scale stability feature of topographic structure are still worthy of further study. Taking different geomorphological types of the Loess Plateau as an example and using the digital elevation model (DEM) as the data source, this paper systematically selects a number of representative geomorphological sample data from the description of the local characteristics of the surface morphology. The local binary model (LBP) distribution characteristics of typical geomorphologic regions are analyzed. Considering the one-to-many correspondence relationship between terrain structure and RILBP, the scale stability characteristics of terrain structure are explored by using the LBP algorithm, which takes into account the rotation invariance, and it is found that the scale characteristics tend to be stable with the increasing of the analysis window. The results show that RILBP can effectively express the terrain structure, and the stable unit of terrain structure can effectively reflect the appropriate scale of terrain analysis. The terrain structure has a unique advantage in the mining of terrain multi-scale information.
【作者单位】：南京师范大学地理科学学院;安徽大学资源与环境工程学院;
【基金】：国家自然科学基金项目(41601411;41671389;41401440) 安徽大学2014年大学生科研训练计划项目(KYXL201404)
【分类号】：P208;P931

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