摘要
分别针对简单行列结构和游程编码形式表示的栅格数据,研究了面的矢量化方法。在边界矢量化方面,提出一套确定初始追踪段、确定后续追踪点走向、避免边界线交叉、保持边界线光滑的有效方法;通过计算闭合边界曲线之间的嵌套关系,确定复杂面的外边界与内边界构成信息。该方法可应用于栅格型地理空间分析和遥感图像专题要素类型的边界提取等方面,具有较高的计算效率且易于实现。
This paper makes a study of the approaches to the area vectorization, basing on the raster data expressed by simple determinant and run-length coding. On the aspect of border vectorization, a set of approaches are presented, which can effectively determine the initial segment of the curve for tracking and the trend of the following tracking points, avoid the borderline crossing and keep borderlines smooth. The external or inner borderline of a complex area object is fixed on by computing the nesting relation among the closed borderlines. This technique can have application in raster-based spatial analysis, borderlines extracting for thematic features of remote sensing images and so on. It is of high computing efficiency and is easy to realize.
出处
《科技通报》
2007年第6期778-784,共7页
Bulletin of Science and Technology
基金
国家自然科学基金(40401046)
关键词
栅格数据
矢量化
矢量边界
二值化
地理信息系统
raster data
vectorization
vector boundary
binarization
Geographic Information System
