计算机与现代化

• 图像处理 •    下一篇

改进ORB算法在图像匹配中的应用

  

  1. (河海大学物联网工程学院,江苏常州213022)
  • 收稿日期:2018-06-28 出版日期:2019-02-25 发布日期:2019-02-26
  • 作者简介:范新南(1965-),男,江苏宜兴人,教授,研究方向:信息获取与处理,E-mail: fanxn519@163.com; 通信作者:顾亚飞(1994-),男,硕士研究生,研究方向:机器人视觉SLAM, E-mail: gyf161308020007@163.com; 倪建军(1978-),男,教授,研究方向:智能感知与信息处理,E-mail: njjhhuc@gmail.com。
  • 基金资助:
    国家自然科学基金资助项目(61203365, 61573128); 国家重点研究计划项目(2016YFC0401606); 中央高校基本科研专项资金资助项目(2018B23214)

Application of Improved ORB Algorithm in Image Matching

  1. (College of Internet of Things Engineering, Hohai University, Changzhou 213022, China)
  • Received:2018-06-28 Online:2019-02-25 Published:2019-02-26

摘要: 在计算机视觉领域,图像匹配是一个核心问题。为了提高图像特征点匹配算法的准确度,增强算法的抗干扰能力,针对ORB(oriented FAST and rotated BRIEF)算法的不足,提出一种改进的图像特征点匹配算法。该算法通过设置自适应阈值来进行特征点检测,并在算法粗匹配结果的基础上剔除不符合图像几何特性的部分外点。最后,利用仿射不变性约束筛选出精确匹配点。实验表明,该方法可有效提高算法匹配质量且执行时间短,对于不同模糊度和曝光度的图像匹配均具有很好的鲁棒性。

关键词: ORB, 自适应, 几何特性, 仿射不变约束

Abstract: In the field of computer vision, image matching is a core issue. In order to improve the accuracy of image feature matching and enhance its anti-interference ability, in view of the insufficiency of ORB (oriented FAST and rotated BRIEF), an improved method based on ORB is proposed. This algorithm sets self-adaptive threshold in the process of detecting feature points. Furthermore, the outer points which do not conform to the geometric characteristics of images are removed after the coarse matching, then the affine invariant constraint is chosen to pick out the exact matching points. The experimental results show that the proposed method has greatly improved the matching quality and has low computing cost. In addition, the proposed method has strong robustness for different blur and exposure degrees.

Key words: ORB, self-adaptive, geometric characteristics, affine invariant constraint

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