Sky-View Factor as a Relief Visualization Technique
Sky-View Factor as a Relief Visualization Technique
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DOI：
10.3390/rs3020398
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发表时间：
2011-02-01
期刊：
影响因子：
5
通讯作者：
Kokalj, Ziga
中科院分区：
文献类型：
--
作者：
Zaksek, Klemen;Ostir, Kristof;Kokalj, Ziga
遥感已成为数字高程模型（DEM）生成的最重要的数据源。DEM分析可以应用于各个领域，其中许多都需要适当的DEM可视化支持。解析山体阴影是最常用的地貌可视化技术。尽管被广泛接受，但这种方法有两个主要缺点：识别深阴影中的细节以及无法正确表示平行于光束的线性特征。几位作者试图通过改变光源的位置或通过滤波来克服这些限制。本文提出了一种新的浮雕可视化技术的基础上扩散，而不是直接，照明。它利用了天空视图因子--一个对应于受地形限制的可见天空部分的参数。天空因子可以作为一种通用的地貌可视化技术来显示地貌特征。特别是，我们表明，这种可视化是一个非常有用的工具，在考古学，因为它提高了识别小规模的功能，从高分辨率DEM。
Remote sensing has become the most important data source for the digital elevation model (DEM) generation. DEM analyses can be applied in various fields and many of them require appropriate DEM visualization support. Analytical hill-shading is the most frequently used relief visualization technique. Although widely accepted, this method has two major drawbacks: identifying details in deep shades and inability to properly represent linear features lying parallel to the light beam. Several authors have tried to overcome these limitations by changing the position of the light source or by filtering. This paper proposes a new relief visualization technique based on diffuse, rather than direct, illumination. It utilizes the sky-view factor-a parameter corresponding to the portion of visible sky limited by relief. Sky-view factor can be used as a general relief visualization technique to show relief characteristics. In particular, we show that this visualization is a very useful tool in archaeology as it improves the recognition of small scale features from high resolution DEMs.