网格运动统计算法的电力走廊图像拼接  

Grid motion statistics algorithm for power corridor image mosaic

作　　者：葛继空 叶业辉 杨静[3] 李卫军 GE Jikong;YE Yehui;YANG Jing;LI Weijun(Chengbang Surveying and Mapping Information Technology(Zhejiang)Company Limited,Ningbo Zhejiang 315000,China;Hainan Diop Technology Company Limited,Haikou Hainan 570000,China;China Hydropower Eighth Engineering Bureau Cornpany Limited,Changsha Hunan 410000,China)

机构地区：[1]诚邦测绘信息科技(浙江)有限公司,浙江宁波315000 [2]海南迪奥普科技有限公司,海南海口570000 [3]中国水利水电第八工程局有限公司,湖南长沙410000

出　　处：《北京测绘》2022年第4期524-530,共7页Beijing Surveying and Mapping

摘　　要：针对电力巡线无人机拍摄输电线路图像具有视差、配准精度低、纹理复杂易出现特征集聚等问题,提出一种基于网格运动统计算法的输电线路拼接方法。首先使用加速“风”算法匹配特征并借助网格运动统计算法保留尽可能多的正确匹配点,然后借助自适应非极大值抑制算法均匀化特征点,再通过尽可能投影算法计算局部单应性矩阵,随后利用随机采样一致性算法得到最优相似变换矩阵并与局部单应性矩阵加权叠加,最后完成图像配准融合。经实验表明:与常用算法相比,所提算法的视觉感观最佳,配准误差最小,拼接效率最高。Aiming at the problems of parallax,low registration accuracy,complex texture and easy feature aggregation in transmission line images taken by power patrol UAV,a transmission line splicing method based on grid motion statistics algorithm was proposed.Firstly,AKAZE algorithm was applied to match characteristics with the aid of the grid movement statistical algorithm to retain as much as possible the correct matching points,and then with the help of adaptive non maximum suppression algorithm the feature points were homogenized.Through the algorithm of as-projective-as-possible,image stitching partial single matrix was calculated,and using random sampling consistency algorithm the optimal similarity transformation matrix,the weighting matrix and partial single sex overlay and the final fusion image registration was obtained.The experimental results showed that the proposed algorithm had the best visual perception,the smallest registration error and the highest stitching efficiency compared with the common algorithms.

关 键 词：图像拼接 网格运动统计算法 特征点均匀化 最优相似变换矩阵 尽可能投影算法 

分 类 号：P258[天文地球—测绘科学与技术]