AUTOMATIC POINT CLOUD CLASSIFICATION OF UNDER-REPRESENTED POLE-LIKE OBJECTS BASED ON HIERARCHICAL DIRECTED GRAPH


Creative Commons License

Ma Z., Bayrak O. C., Remondino F.

IEEE International Symposium on Geoscience and Remote Sensing (IGARSS), Athens, Yunanistan, 7 - 12 Temmuz 2024, ss.1-4

  • Yayın Türü: Bildiri / Tam Metin Bildiri
  • Basıldığı Şehir: Athens
  • Basıldığı Ülke: Yunanistan
  • Sayfa Sayıları: ss.1-4
  • Yıldız Teknik Üniversitesi Adresli: Evet

Özet

Existing supervised point cloud classification methods cannot correctly classify under-represented objects, such as poles, due to the limited number of points in annotated clouds. In this article, we innovatively overcame the challenge of extracting pole-like objects from point clouds proposing a graph-based method. We approach and treat the problem as a hierarchical graph problem, where the focus is on counting the directed edges connecting nodes. The proposed method effectively captures the vertical structure of poles, a key characteristic often missed by conventional deep learning methods due to the sparsity of pole-like objects and the limited number of annotated points. Experiments on the Hessigheim 3D dataset demonstrate the efficiency of the proposed method for automatically extract pole-like objects from airborne point clouds.