| 两种面向地貌晕渲的光照模型比较 |
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| 引用本文： | 张威巍,游雄,宋国民.两种面向地貌晕渲的光照模型比较[J].测绘学院学报,2009(2). |
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| 作者姓名： | 张威巍 游雄 宋国民 |
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| 作者单位： | 信息工程大学测绘学院; |
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| 摘 要： | 光照模型是影响数字地貌晕渲的一个关键因素。在参照传统晕渲着色规则的基础上,结合数字地貌晕渲的投影方式及视点、光源的设置方法,从理论上分析了Lambert漫反射模型、基于坡向光照模型的特征;分别利用规则物体和地形数据对这两种光照模型所产生的效果进行了实验和对比;结果表明漫反射模型更适合起伏较平缓地区的晕渲,基于坡向的光照模型更能突出山体的起伏特征。最后结合理论分析讨论了产生这种实验结果的原因并提出了3点改进意见。
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| 关 键 词： | 数字地貌晕渲 Lambert漫反射模型 基于坡向的光照模型 |
Comparision of Two Relief Shading Oriented Illumination Models |
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| ZHANG Wei-wei,YOU Xiong,SONG Guo-ming.Comparision of Two Relief Shading Oriented Illumination Models[J].Journal of Institute of Surveying and Mapping,2009(2). |
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| Authors: | ZHANG Wei-wei YOU Xiong SONG Guo-ming |
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| Institution: | Institute of Surveying and Mapping;Information Engineering University;Zhengzhou 450052;China |
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| Abstract: | Illumination model is one of important factors which impact digital relief shading.Refering to traditional relief shading rule,the characters of Lambert diffuse illumination model and aspect-based shading was analyzed based on the method of projection,view and lighting in digital relief shading.The relief shading outcomes of two illumination models were compared using regular object models and DEM.The experimented results showed that Lambert diffuse model was more suitable for representing flat terrein and ... |
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| Keywords: | digital relief shading Lambert diffuse model aspect-based shading |
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