Acta Geodaetica et Cartographica Sinica ›› 2020, Vol. 49 ›› Issue (11): 1463-1472.doi: 10.11947/j.AGCS.2020.20190499

• Photogrammetry and Remote Sensing • Previous Articles     Next Articles

View selection strategy for photo-consistency refinement

ZHU Yan1, YAN Qingsong1, QU Yingjie1, CHEN Xin1, DENG Fei1,2   

  1. 1. School of Geodesy and Geomatics, Wuhan University, Wuhan 430079, China;
    2. Key Laboratory of Urban Land Resources Monitoring and Simulation, Ministry of Land and Resources, Shenzhen 518000, China
  • Received:2019-12-06 Revised:2020-06-23 Published:2020-11-25
  • Supported by:
    The Open Fund of Key Laboratory of Urban Land Resources Monitoring and Simulation, Ministry of Land and Resources (No. KF-2018-03-025)

Abstract: In 3D reconstruction, mesh refinement is generally applied to deal with noise and lack of details in triangular mesh built from dense point cloud. The existing variational refinement methods optimize the photo-consistency of the initial mesh by utilizing all the image data, but ignore the redundancy of image information and the impact of view quality on mesh refinement to some extent. In this regard, this paper proposes the strategies of master view selection and slave view selection, so as to improve the efficiency and quality of mesh refinement. Firstly, Markov random field is constructed by combining image gradient magnitude and contour detection to select master view for each triangular facet, and then slave view is selected according to the corresponding observation condition for each master view. Afterwards, we calculate the norm-weighted photo-consistency between master view and slave view, and finally surface energy function is minimized by using gradient decent method to obtain the refined mesh. The experiments show that the proposed method can recover more fine-scale details, meanwhile shorten time and increase accuracy of refinement, which confirms the validity of the proposed method qualitatively and quantitatively.

Key words: view selection, photo-consistency, variational refinement, 3D reconstruction

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