摘要
采用模糊的方法来描述方向关系.首先给每个方向定义一个模糊隶属函数,使得目标对象属于某个方向的模糊性可用一个模糊集来描述,9方向关系系统可用9个模糊集来描述;然后在每个模糊集上定义一个聚集算子,使得每个模糊对象和精确对象间的方向关系可用一个3×3的模糊矩阵来描述.
A fuzzy membership function was defined for each direction to predict the membership degree that an object pertains to a certain direction. Nine fuzzy membership functions were defined to describe the direction relations between fuzzy objects and crisp objects with corresponding fuzzy sets. Direction relations were described by a 3 × 3 fuzzy matrix, which was computed by an aggregation operator defined on the nine fuzzy sets. The fuzzy matrices and crisp matrices of direction relations between fuzzy objects and crisp objects were computed respectively, and comparison of fuzzy matrices with crisp ones reveals that the proposed fuzzy approach is more effective than existing crisp method.
出处
《计算机辅助设计与图形学学报》
EI
CSCD
北大核心
2005年第8期1744-1751,共8页
Journal of Computer-Aided Design & Computer Graphics
基金
国家自然科学基金(40271090)
关键词
方向关系
模糊描述
模糊对象
direction relation
fuzzy description
fuzzy object
作者简介
杜世宏 男,1975年生,博士后研究人员,主要研究方向为空间关系理论及其在遥感图像识别、遥感图像匹配和检索中的应用.dshgis@hotmail.com
王桥 男,1957年生,博士,教授,博士生导师,主要研究方向为环境地理信息系统、环境遥感.
杨一鹏 男,1974年生,博士研究生,助理研究员,主要研究方向为环境遥感.
李治江 男,1977年生,博士研究生,主要研究方向为数字摄影测量.