摘要
由于直线本身缺乏显著特征,使用点与直线相关联的方法可提高直线特征的描述能力。针对特征点间及直线间均存在误匹配的问题,提出一种基于相关点与几何约束的直线匹配方法。首先,将直线邻域内满足条件的特征点定义为直线相关点,利用相关点与直线构造仿射不变量来描述直线,通过度量仿射不变量的相似性进行直线初匹配;然后计算仿射变换模型,通过直线角度和几何距离位置约束进行精匹配,去除误匹配直线,得到最终匹配结果。实验结果分析表明:本研究算法不仅适用于发生仿射变换的各种图像,得到更多的匹配直线对,匹配精度高,对发生仿射变换的图像、纹理复杂和纹理简单的图像,均能取得较好的直线匹配效果。
To combine related points and line can increase the line＇s features description ability. However,straight lines exist error matching situations. In order to improve line matching accuracy,a straight line matching method based on related points and geometric constraints is proposed. Firstly,related points are chosen and used to construct affine invariant to describe line feature. And lines are matched coarsely based on the similarity of affine invariant. Then,affine transformation model is calculated and straight lines are matched finely by the constraints of line angle and distance. The experimental results show that the method is suitable for image with affine transformation images,can obtain more matched lines pairs with high accuracy. It can obtain good line matching results for images with affine transformation and images with complex or simple texture.
作者
符祥
尹红
黄勇
曾接贤
FU Xiang;YIN Hong;HUANG Yong;ZENG Jie-xian(School of Software, Nanchang Hangkong University, Nanchang 330063, Chin)
出处
《南昌航空大学学报（自然科学版）》
CAS
2018年第1期41-47,共7页
Journal of Nanchang Hangkong University(Natural Sciences)
基金
国家自然科学基金(61662049
61763033
61741312
61762067)
国家留学基金委资助项目(201608360163)
关键词
SIFT特征点
仿射不变性
几何约束
直线匹配
straight line matching
feature points
affine invariants
geometric constraints
