1. The School of Electronic and Information Engineering, Anhui Jianzhu University, Hefei, China
2. Department of Remote Sensing and Photogrammetry, Finnish Geospatial Research Institute, Espoo, Finland
3. Institute of Unmanned System, Beihang University, Beijing, China
4. Anhui International Joint Research Center for Ancient Architecture Intellisencing and Multi-Dimensional Modeling, Anhui Jianzhu University, Hefei, China