测绘学报 ›› 2023, Vol. 52 ›› Issue (6): 966-979.doi: 10.11947/j.AGCS.2023.20220448

• 摄影测量学与遥感 • 上一篇    下一篇

顾及场景连通性的混合式SfM方法

屈文虎1, 刘振东1, 蔡昊琳2, 张帅哲2   

  1. 1. 中国测绘科学研究院, 北京 100830;
    2. 山东科技大学测绘与空间信息学院, 山东 青岛 266590
  • 收稿日期:2022-07-14 修回日期:2023-01-30 发布日期:2023-07-08
  • 通讯作者: 刘振东 E-mail:lzdgis08@126.com
  • 作者简介:屈文虎(1998-),男,硕士生,研究方向为数字摄影测量与遥感。E-mail:qvwenhu@163.com
  • 基金资助:
    自然资源部基础测绘项目(A2206);中国测绘科学院基本科研业务(AR2215)

A hybrid SfM method considering scene connectivity

QU Wenhu1, LIU Zhendong1, CAI Haolin2, ZHANG Shaizhe2   

  1. 1. Chinese Academy of Surveying and Mapping, Beijing 100830, China;
    2. College of Geodesy and Geomatics, Shandong University of Science and Technology, Qingdao 266590, China
  • Received:2022-07-14 Revised:2023-01-30 Published:2023-07-08
  • Supported by:
    Basic Surveying and Mapping Project of the Ministry of Natural Resources (No. A2206); Basic Scientific Research Business Fee of the Chinese Academy of Surveying and Mapping (No. AR2215)

摘要: SfM方法在三维稀疏重建方面获得了巨大的成功,但面对大规模场景重建问题时,该方法仍面临着严重的挑战。针对现有混合式SfM方法场景划分影像分布松散、子簇扩展效率低,以及子簇合并稳健性差等问题,本文提出一种顾及场景连通性的混合式SfM方法。首先,提出一种基于归一化割的多因子联合场景划分算法,有效地解决了场景划分后子簇内影像空间分布松散的问题;其次,提出一种顾及分区连通性的子簇均衡扩展算法,提高了扩展的效率及子簇间的连通程度;然后,通过在局部重建阶段引入质检及二次重建机制,消除了局部重建质量不合格子簇对合并的影响,并提出一种顾及簇间连通性的子簇合并算法,实现子簇间的稳健合并;最后,利用多组公开数据集和多视倾斜摄影数据集进行试验验证。结果表明:本文方法在稳健性和效率等方面均优于目前先进的方法,具有较好的可行性和先进性。

关键词: 混合式SfM, 连通性, 场景分区, 子簇合并

Abstract: SfM method has achieved great success in 3D sparse reconstruction, but it still meets serious challenges in large-scale scene reconstruction. Aiming at solving the problem of loose image distribution, low efficiency of subcluster expansion and weak robustness of subcluster merging in existing hybrid SfM methods, a hybrid SfM method considering scene connectivity isproposed in this paper. Firstly, a multifactor joint scene division algorithm based on normalized cut is proposed, which effectively solves the problem of loose image space distribution in subclusters after scene division; Secondly, a subcluster balanced expansion algorithm considering partition connectivity is proposed to improve the expansion efficiency and connectivity between subclusters; Then, a quality check and secondary reconstruction mechanism in the local reconstruction stage are introduced to eliminate the influence of subclusters with unqualified local reconstruction quality on merging, and a subcluster merging algorithm considering the connectivity between clusters is proposed to implement the robust merging among subclusters. Finally, experimental validation is conducted using multiple open datasets and multi-view datasets, and the results show that the method proposed in this paper is superior to state-of-the-art methods in terms of robustness and efficiency, and has better feasibility and advancement.

Key words: hybrid SfM, connectivity, scene partitioning, subcluster merging

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