| 平面影像到DQG像元的转换精度与效率分析 |
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| 引用本文： | 朱利超,于志龙,张亮.平面影像到DQG像元的转换精度与效率分析[J].测绘与空间地理信息,2016(1):173-176. |
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| 作者姓名： | 朱利超 于志龙 张亮 |
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| 作者单位： | 山东省水利勘测设计院,山东济南,250013 |
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| 摘 要： | 平面影像到退化四叉树格网(Degenerate Quadtree Grid,DQG)的转换是实现全球DQG无缝可视化建模的前提任务。以相交面积为权重,提出平面影像到球面退化四叉树格网的转换算法。实验利用4km分辨率256级灰度图像数据Wsiearth.tif和30m分辨率Landsat5 Level4遥感数据,详细对比分了平面影像到退化四叉树格网与平面影像到四元三角格网(Quaternary Triangular Mesh,QTM)的转换精度和效率。
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| 关 键 词： | 退化四叉树格网 投影转换 精度 效率 |
Accuracy and Efficien cy Analysis of the Trans formation from F lat Image to the Sph erical DQG Pixel |
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| Abstract: | The transformation from flat image to the spherical DQG pixel is the premise to realize the global DQG mesh seamless visual modeling.As power value determined by the intersecting area size, the image transformation algorithm of flat image to spherical DQG is developed.The experiment analyzed the transformation accuracy and efficiency between the flat image to the spherical Degenerate Quadtree Grid and the flat image to the Quaternary Triangular Mesh. |
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| Keywords: | degenerate quadtree grid projection transformation accuracy efficiency |
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