测绘通报 ›› 2020, Vol. 0 ›› Issue (3): 123-128.doi: 10.13474/j.cnki.11-2246.2020.0092

• 第七届测绘科学前沿技术论坛获奖作文 • 上一篇    下一篇

一种改进的APAP影像匹配算法

张冬梅, 卢小平, 苗沛基, 周雨石, 马靓婷   

  1. 河南理工大学矿山空间信息技术自然资源部重点实验室, 河南 焦作 454000
  • 收稿日期:2019-05-30 出版日期:2020-03-25 发布日期:2020-04-09
  • 通讯作者: 卢小平。E-mail:hpuluxp@163.com E-mail:hpuluxp@163.com
  • 作者简介:张冬梅(1992-),女,硕士生,主要研究方向为视频流处理。E-mail:1770556573@qq.com
  • 基金资助:
    国家重点研发计划(2016YFC0803103);河南省高校创新团队支持计划(14IRTSTHN026)

An improved APAP image matching algorithm

ZHANG Dongmei, LU Xiaoping, MIAO Peiji, ZHOU Yushi, MA Liangting   

  1. Key Laboratory of Mine Spatial Information and Technology of MNR, Henan Polytechnic University, Jiaozuo 454000, China
  • Received:2019-05-30 Online:2020-03-25 Published:2020-04-09

摘要: 针对无人机影像匹配时易出现影像重影、透视失真和耗时较长等问题,本文提出了一种改进的APAP算法。该算法首先利用SIFT算法选取特征点,通过改进RANSAC算法去除误匹配点;然后根据APAP算法对影像进行网格划分,求每个网格的单应性矩阵,并对单应性矩阵进行线性化;最后根据线性化的单应性矩阵进行影像匹配,单应性矩阵的线性化不仅对影像匹配时产生的重影现象有较好的削弱作用,而且能减少非重叠区域的透视失真。试验结果表明,本文方法在匹配效率和匹配效果方面效果显著。

关键词: 无人机影像, APAP算法, RANSAC算法, 单应性矩阵, 线性化

Abstract: Aiming at the problems of image ghosting, perspective distortion and long time consumption when UAV image matching, this paper proposes an improved APAP algorithm. First, this algorithm uses SIFT algorithm to select feature points and removes the mismatch point by improving RANSAC algorithm. Then, according to the APAP algorithm, the image is meshed, the homography matrix of each mesh is obtained, and the homography matrix is linearized. Finally, the image matching is performed according to the linearized homography matrix, and the homography matrix is Linearization not only weakens the ghosting phenomenon caused by image matching, but also reduces the perspective distortion of non-overlapping regions. The experimental results show that the proposed method is effective in matching efficiency and matching effect.

Key words: UAV image, APAP algorithm, RANSAC algorithm, homography, linear

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