| 基于偏微分方程的小比例尺晕渲图地貌综合方法研究 |
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| 引用本文： | 陈维崧,李少梅,吴刚.基于偏微分方程的小比例尺晕渲图地貌综合方法研究[J].测绘工程,2012,21(3):5-8. |
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| 作者姓名： | 陈维崧 李少梅 吴刚 |
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| 作者单位： | 信息工程大学测绘学院,河南郑州,450052 |
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| 基金项目： | 国家自然科学基金资助项目 |
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| 摘 要： | 基于高精度DEM数据的晕渲图中,破碎的地形细节破坏了晕渲法的立体塑造能力,但是采用传统的均值滤波法进行地貌综合时,在消除地形细节的同时,模糊了地貌特征。为了克服消除地形细节和保持地貌特征这一矛盾,利用偏微分方程各向异性的特点,采用基于经典总变分模型的偏微分方程法对地貌进行综合。实验结果证明偏微分方程法在综合地貌时能较好地保持地貌结构特征。
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| 关 键 词： | 地貌综合 偏微分方程 总变分模型 |
PDE applied in small-scale relief shading generalization |
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| CHEN Wei-song
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LI Shao-mei
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WU Gang.PDE applied in small-scale relief shading generalization[J].Engineering of Surveying and Mapping,2012,21(3):5-8. |
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| Authors: | CHEN Wei-song LI Shao-mei WU Gang |
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| Institution: | (Institute of Surveying and Mapping,Information Engineering University,Zhengzhou 450052,China) |
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| Abstract: | In the shaded relief derived automatical from digital elevation models of high-quality,many small topographic details that are presented in terrain models disturb the clear portrayal of the mian relief features.If apply mean filter to generalize relief,it is impossible to remove small topographic details,but also a good terrain representation of geomorphological feature.In the paper,the applications of TV model in relief generalization are expounded.The experiment results show that this method of PDE has more accuracy in the representation of geomorphological feature. |
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| Keywords: | relief generalization PDE Total Variation(TV) model |
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