中文摘要：

遥感影像图斑转化为面状矢量具有重要意义,而现有矢量化算法在＂孔洞＂处理方面存在不足.为此,提出了基于像元角点搜索的栅格矢量化算法,首先利用像元的角点建立轮廓点集合,然后由连接轮廓点的弧段集合中的非共享弧段形成有效弧段集,最后通过搜索有效弧段集形成闭合边界.实验表明,该方法可以有效解决带有孔洞多边形的快速矢量化问题.

英文摘要：

Vectorization is an important technique in remote sensing image processing. The existing vector- iztion algorithms are mostly insufficient on vectorization of holes. This paper proposes an algorithm based on corner pixels. A set of pixels consisting of corners is first established, and another set （valid arc set） with arcs connecting contour points also established for contour search. A dosed contour of an object is defined by searching valid arc sets according to certain rules. ExperimentM results show validity of the proposed algorithm in solving the problem of holes.