| 扫描细化算法的地图自动矢量化研究 |
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| 引用本文： | 刘人午,李燕. 扫描细化算法的地图自动矢量化研究[J]. 测绘学报, 2012, 41(2): 309-314 |
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| 作者姓名： | 刘人午 李燕 |
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| 作者单位： | 1.昆明理工大学国土资源工程学院,云南昆明,650093;2.昆明理工大学国土资源工程学院,云南昆明,650093 |
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| 基金项目： | 四川省科技厅软科学规划项目 |
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| 摘 要： | 根据栅格线体的形态特征设计通过对栅格线体的序贯推扫及截断扫描获取截断处的中心像素的扫描细化算法。细化结果受线体边缘条件的影响小、特征像素较少。设计了针对于扫描细化算法的自动追踪矢量化算法,其特点包括减少坐标转换量以及矢量线体节点数,光滑后趋于栅格线体中心,线体不在交点处相互打断,提高自动矢量化及其后处理工作的效率。
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| 关 键 词： | 地理信息系统 扫描细化算法 栅格地图 线状符号 自动矢量化 |
| 收稿时间： | 2011-03-29 |
| 修稿时间： | 2011-08-09 |
Study of Auto-vectorization Based on Scan-thinning Algorithm |
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| LIU Renwu,LI Yan. Study of Auto-vectorization Based on Scan-thinning Algorithm[J]. Acta Geodaetica et Cartographica Sinica, 2012, 41(2): 309-314 |
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| Authors: | LIU Renwu LI Yan |
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| Affiliation: | Faculty of Land Resource Engineering,Kunming University of Sicence and Technology,Kunming 650093,China |
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| Abstract: | The scan-thinning algorithm based on the morphological characteristics of the raster lines is designed.The result of the scan-thinning algorithm has some characteristics,less influence of the edge conditions,less center-pixels.The auto-tracking-vectorization algorithm disposes the result of the scan-thinning algorithm.It reduces the working of coordinate transfer.At the same time the results of this algorithm contain less nodes,approach with the center of line,do not mutual interrupted at the intersection.It improved the efficiency of auto-vectorization and post-processing. |
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| Keywords: | GIS scan-thinning algorithm raster graphics line symbol auto-vectorization |
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