Blar i NTNU Open på forfatter "Fan, Hongchao"
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Evaluating Apple's integrated LiDAR devices for Indoor 3D Modelling
Vinje, Marte Haugestøyl (Master thesis, 2021)Målet med denne masteroppgaven er å se på mulighetene for automatisert innendørs modellering ved bruk av lavprissensorer som mobiltelefoner, nå nylig med innebygd LiDAR-sensor. Mobiltelefonen som brukes er Apples iPhone ... -
Evaluating spatial accessibility to healthcare services from the lens of emergency hospital visits based on floating car data
Jiao, Wei; Huang, Wei; Fan, Hongchao (Peer reviewed; Journal article, 2022)Public medical facilities that are closely related to the health of residents have been recognised as one of the most crucial elements in sustainable urban planning. For the sake of social equality of medical services ... -
Exploring the distribution patterns of Flickr photos
Xuan, Ding; Fan, Hongchao (Journal article; Peer reviewed, 2019)In recent years, volunteered-geographic-information (VGI) image data have served as a data source for various geographic applications, attracting researchers to assess the quality of these images. However, these applications ... -
Exploring the influence of e-hailing applications on the taxi industry-from the perspective of the drivers
Gan, Yitong; Fan, Hongchao; Jiao, Wei; Sun, Mengqi (Peer reviewed; Journal article, 2021)In China, the traditional taxi industry is conforming to the trend of the times, with taxi drivers working with e-hailing applications. This reform is of great significance, not only for the taxi industry, but also for the ... -
Feasibility of using Grammars to infer room semantics
Hu, Xuke; Fan, Hongchao; Noskov, Alexey; Zipf, Alexander; Wang, Zhiyong; Shang, Jianga (Journal article; Peer reviewed, 2019)Current indoor mapping approaches can detect accurate geometric information but are incapable of detecting the room type or dismiss this issue. This work investigates the feasibility of inferring the room type by using ... -
Future Swedish 3D City Models—Specifications, Test Data, and Evaluation
Uggla, Maria; Olsson, Perola; Abdi, Barzan; Axelsson, Björn; Calvert, Matthew; Christensen, Ulrika; Gardevärn, Daniel; Hirsch, Gabriel; Jeansson, Eric; Kadric, Zuhret; Lord, Jonas; Loreman, Axel; Persson, Andreas; Setterby, Ola; Sjöberger, Maria; Stewart, Paul; Rudenå, Andreas; Ahlström, Andreas; Bauner, Mikael; Hartman, Kendall; Pantazatou, Karolina; Liu, Wenjing; Fan, Hongchao; Kong, Gefei; Liu, Hang; Harrie, Lars (Peer reviewed; Journal article, 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 ... -
A General and Effective Method for Wall and Protrusion Separation from Facade Point Clouds
Cai, Shangshu; Zhang, Shuhang; Zhang, Wuming; Fan, Hongchao; Shao, Jie; Yan, Guangjian; Yu, Sisi; Li, Aiguang; Zhou, Guoqing (Peer reviewed; Journal article, 2023)As a critical prerequisite for semantic facade reconstruction, accurately separating wall and protrusion points from facade point clouds is required. The performance of traditional separation methods is severely limited ... -
Generation of 3D Human Body by Using Dense Image Matching
Bjørkås, Petter (Master thesis, 2020)Fotogrammetri er en utfordrende metode som krever tunge beregninger og helst en topp moderne arbeidsstasjon. I nyere tid har kunstig intelligens spredd seg til en rekke tekniske felt for å løse praktiske problemer til stor ... -
GIScience can facilitate the development of solar cities for energy transition
Zhu, Rui; Kwan, Mei-Po; Perera, A.T.D.; Fan, Hongchao; Yang, Bisheng; Chen, Biyu; Chen, Min; Qian, Zhen; Zhang, Haoran; Zhang, Xiaohu; Yang, Jinxin; Santi, Paolo; Ratti, Carlo; Li, Wenting; Yan, Jinyue (Peer reviewed; Journal article, 2023)The energy transition is increasingly being discussed and implemented to cope with the growing environmental crisis. However, great challenges remain for effectively harvesting and utilizing solar energy in cities related ... -
A graph attention network for road marking classification from mobile LiDAR point clouds
Fang, Lina; Sun, Tongtong; Wang, Shuang; Fan, Hongchao; Li, Jonathan (Journal article; Peer reviewed, 2022) -
A Grid-Based Approach for Measuring Similarities of Taxi Trajectories
Jiao, Wei; Fan, Hongchao; Midtbø, Terje (Peer reviewed; Journal article, 2020)Similarity measurement is one of the key tasks in spatial data analysis. It has a great impact on applications i.e., position prediction, mining and analysis of social behavior pattern. Existing methods mainly focus on the ... -
How can voting mechanisms improve the robustness and generalizability of toponym disambiguation?
Hu, Xuke; Sun, Yeran; Kersten, Jens; Zhou, Zhiyong; Klan, Friederike; Fan, Hongchao (Peer reviewed; Journal article, 2023)Natural language texts, such as tweets and news, contain a vast amount of geospatial information, which can be extracted by first recognizing toponyms in texts (toponym recognition) and then identifying their geospatial ... -
A Hybrid Method to Incrementally Extract Road Networks Using Spatio-Temporal Trajectory Data
Zhang, Yunfei; Zhang, Zexu; Huang, Jincai; She, Tingting; Deng, Min; Fan, Hongchao; Xu, Peng; Deng, Xingshen (Peer reviewed; Journal article, 2020)With the rapid development of urban traffic, accurate and up-to-date road maps are in crucial demand for daily human life and urban traffic control. Recently, with the emergence of crowdsourced mapping, a surge in academic ... -
An Interactive platform for low-cost 3D building modeling from VGI data using convolutional neural network
Fan, Hongchao; Kong, Gefei; Zhang, Chaoquan (Journal article, 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, ... -
Layout graph model for semantic façade reconstruction using laser point clouds
Fan, Hongchao; Wang, Yuefeng; Gong, Jianya (Peer reviewed; Journal article, 2021)Building façades can feature different patterns depending on the architectural style, functionality, and size of the buildings; therefore, reconstructing these façades can be complicated. In particular, when semantic façades ... -
Nighttime Lights Based Pathfinding Model for Electrical Line Layout Prediction
Mathiesen, Mons Erling (Master thesis, 2021)Verden holder ikke følge med FNs bærekraftig utviklingsmål 7, "ensure access to affordable, reliable, sustainable and modern energy for all". Fem hundre åttifem millioner mennesker i Afrika sør for Sahara forventes å leve ... -
PH-shape: an adaptive persistent homology-based approach for building outline extraction from ALS point cloud data
Kong, Gefei; Fan, Hongchao (Peer reviewed; Journal article, 2023)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 ... -
A Probabilistic Method for Fractured Cultural Relics Automatic Reassembly
Wang, Haiping; Zang, Yufu; Liang, Fuxun; Dong, Zheng; Fan, Hongchao; Yang, Bisheng (Peer reviewed; Journal article, 2021)Masses of fragile cultural relics are dug out in fragments due to long-standing burying and their fragility, which must be reassembled to play a role in cultural heritage study. However, it is very challenging to automatically ... -
Quality Assessment of Building Footprint data on OpenStreetMap in Norway
Landmark, Rikke Bang (Master thesis, 2021)OpenStreetMap (OSM) er en av de mest populære kartene som er laget ved bruk av digital dugnad. OSM kan tilegne seg ny informasjon raskt og detaljert, og kan bli brukt i områder hvor det er vanskelig å skaffe kommersiell ... -
Quantifying vertical profiles of biochemical traits for forest plantation species using advanced remote sensing approaches
Shen, Xin; Cao, Lin; Coops, Nicholas C.; Fan, Hongchao; Wu, Xiangqian; Liu, Hao; Wang, Guibin; Cao, Fulin (Peer reviewed; Journal article, 2020)Biochemical traits in forest vegetation are key indicators of leaf physiological processes, specifically photosynthetic and other photochemical light pathways, and are critical to the quantification of the terrestrial ...