Zobrazeno 1 - 10
of 15
pro vyhledávání: '"Gefei Kong"'
Autor:
Gefei Kong, Hongchao Fan
Publikováno v:
Geo-spatial Information Science, Vol 27, Iss 4, Pp 1107-1117 (2024)
Building outline extraction from segmented point clouds is a critical step of building footprint generation. Existing methods for this task are often based on the convex hull and α-shape algorithm. There are also some methods using grids and Delauna
Externí odkaz:
https://doaj.org/article/82006e67885f42b2840970447bcd5c13
Publikováno v:
International Journal of Digital Earth, Vol 16, Iss 2, Pp 4811-4830 (2023)
ABSTRACTRoof vertex information is vital for 3D roof structures. Reconstructing 3D roof structures from point cloud data using traditional methods remains a challenge because their extracted roof vertices are affected by uncertainty and additional er
Externí odkaz:
https://doaj.org/article/b912e2d43cb943e68f85858213ab0f04
Automatic building outline extraction from ALS point cloud data using generative adversarial network
Publikováno v:
Geocarto International, Vol 37, Iss 27, Pp 15964-15981 (2022)
AbstractThe generation of building footprints from laser scanning point clouds or remote sensing images involves three steps: segmentation, outline extraction and boundary regularization/generalization. Currently, existing approaches mainly focus on
Externí odkaz:
https://doaj.org/article/b9f2a370b76d420c827e1d4a2fd517c6
Autor:
Mattia Manni, Alessandro Nocente, Gefei Kong, Kristian Skeie, Hongchao Fan, Gabriele Lobaccaro
Publikováno v:
Frontiers in Energy Research, Vol 10 (2022)
Solar mapping can contribute to exploiting more efficiently the solar energy potential in cities. Solar maps and 3D solar cadasters consist of visualization tools for solar irradiation analysis on urban surfaces (i.e., orography, roofs, and façades)
Externí odkaz:
https://doaj.org/article/982d90494e414fc28a9267d10e3f15bd
Publikováno v:
Big Earth Data, Vol 5, Iss 1, Pp 49-65 (2021)
The applications of 3D building models are limited as producing them requires massive labor and time costs as well as expensive devices. In this paper, we aim to propose a novel and web-based interactive platform, VGI3D, to overcome these challenges.
Externí odkaz:
https://doaj.org/article/fda03d706fd740a7901f4f7e19165051
Autor:
Maria Uggla, Perola Olsson, Barzan Abdi, Björn Axelsson, Matthew Calvert, Ulrika Christensen, Daniel Gardevärn, Gabriel Hirsch, Eric Jeansson, Zuhret Kadric, Jonas Lord, Axel Loreman, Andreas Persson, Ola Setterby, Maria Sjöberger, Paul Stewart, Andreas Rudenå, Andreas Ahlström, Mikael Bauner, Kendall Hartman, Karolina Pantazatou, Wenjing Liu, Hongchao Fan, Gefei Kong, Hang Li, Lars Harrie
Publikováno v:
ISPRS International Journal of Geo-Information, Vol 12, Iss 2, p 47 (2023)
Three-dimensional city models are increasingly being used for analyses and simulations. To enable such applications, it is necessary to standardise semantically richer city models and, in some cases, to connect the models with external data sources.
Externí odkaz:
https://doaj.org/article/7381dda3f0fe4c2e9f1603c07348c405
Publikováno v:
Nordic Machine Intelligence. 2
In this paper, a simple boundary-enhanced network and a new multi-task loss function are proposed for building segmentation from multiple remote sensing sources. The experimental results on MapAI-challenge dataset demonstrates that our network can se
Autor:
Gefei Kong, Hongchao Fan
Publikováno v:
IEEE Transactions on Geoscience and Remote Sensing. 59:10519-10531
Facade parsing is an essential process before the 3-D modeling of digital or virtual 3-D city models. The existing grammar-based approaches for facade parsing rely on strong prior knowledge but can obtain facade parts with better structure. Pixelwise
Publikováno v:
Big Earth Data, Vol 5, Iss 1, Pp 49-65 (2021)
Big Earth Data
Big Earth Data
The applications of 3D building models are limited as producing them requires massive labor and time costs as well as expensive devices. In this paper, we aim to propose a novel and web-based interactive platform, VGI3D, to overcome these challenges.
Publikováno v:
Journal of Geovisualization and Spatial Analysis. 5
Applications in smart cities are inseparable from the usage of three-dimensional (3D) building models. However, the cost of generating and constructing 3D building models with semantic information is high both in time and in labour. To solve this pro