南京大学学报(自然科学版) ›› 2015, Vol. 51 ›› Issue (5): 10301038.
张学良1,2,3,冯学智1,2,3 ,肖鹏峰1,2,3
Zhang Xueliang1, Feng Xuezhi1,2,3*, Xiao Pengfeng1,2,3
摘要: 图像分割是高分辨率遥感图像处理和分析的关键环节。本文探讨了将区域合并方法应用于高分辨率遥感图像多尺度分割的技术要点,旨在提升分割的精度和效率,获得地物对象的多尺度表达。主要研究内容包含如下五个方面:(1)图模型的构建,包括区域邻接图和最近邻图,以提高分割效率;(2)合并准则的确定,选择能有效表征区域同质性、形状和边界的图像特征并加以组合,提升分割精度;(3)合并策略的选择,针对寻优范围不同列出面向全局、面向局部以及混合区域合并等三种合并策略,并分析各自的特点;(4)尺度参数的设置,针对面向局部的区域合并策略提出递增的尺度参数序列控制方法,生成边界一致的多尺度分割结果;(5)分割树的设计,利用树中不同层级的节点表达不同尺度的分割区域,可快速输出多尺度分割结果。研究成果可应用于高分辨率遥感图像面向对象分析、地物目标识别和信息提取。
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