Searched for: author%3A%22Zhou%2C+K.%22
(1 - 13 of 13)
document
Zhou, K. (author)
3D city models are increasingly used to maintain and improve urban infrastructure. Keeping 3D city models accurate and up-to-date is essential for municipalities to make decisions in a time of strongly increasing urbanization. 3D information provided by airborne laser scanning (ALS) is widely used for generating 3D city models. However, ALS data...
doctoral thesis 2020
document
Zhou, K. (author), Lindenbergh, R.C. (author), Gorte, Ben (author), Zlatanova, S. (author)
Change detection is essential to keep 3D city models up-to-date. LiDAR data with high accuracy are used to create 3D city models. However, updating LiDAR data at state or nation level often takes around a decade. Very high resolution (VHR) stereo images, with often yearly updating rate and dense 3D information, provide an option for...
journal article 2020
document
Zhou, K. (author), Lindenbergh, R.C. (author), Gorte, Ben (author)
Up-to-date 3D city models are needed for many applications. Very-high-resolution (VHR) images with rich geometric and spectral information and a high update rate are increasingly applied for the purpose of updating 3D models. Shadow detection is the primary step for image interpretation, as shadow causes radiometric distortions. In addition,...
journal article 2019
document
Zhou, K. (author), Chen, Y. (author), Smal, I.V. (author), Lindenbergh, R.C. (author)
Up-to-date 3D building models are important for many applications. Airborne very high resolution (VHR) images often acquired annually give an opportunity to create an up-to-date 3D model. Building segmentation is often the first and utmost step. Convolutional neural networks (CNNs) draw lots of attention in interpreting VHR images as they can...
journal article 2019
document
Gorte, B. G.H. (author), Zhou, K. (author), Van Der Sande, C. J. (author), Valk, C. (author)
Representation of scenes on the Earth surface by using voxels is gaining attention because of its suitability for integrating heterogeneous data sources in simulations and quantitative models. Computation of shadows in such models is needed, for example, to obtain crop suitability of agricultural fields in the presence of trees and buildings,...
journal article 2018
document
Zhou, K. (author), Gorte, B. (author), Lindenbergh, R.C. (author), Widyaningrum, E. (author)
Change detection is an essential step to locate the area where an old model should be updated. With high density and accuracy, LiDAR data is often used to create a 3D city model. However, updating LiDAR data at state or nation level often takes years. Very high resolution (VHR) images with high updating rate is therefore an option for change...
journal article 2018
document
Widyaningrum, E. (author), Lindenbergh, R.C. (author), Gorte, B.G.H. (author), Zhou, K. (author)
Various kinds of urban applications require true orthophotos. True orthophoto generation requires a DSM (Digital Surface Model) to project the photo orthogonally and minimize geometric distortion due to topographic variance. DSMs are often generated from airborne laser scan data. In urban scenes, DSM data may fail to deliver sharp and...
journal article 2018
document
Chen, Y. (author), Gao, W. (author), Widyaningrum, E. (author), Zheng, M. (author), Zhou, K. (author)
Semantic segmentation, especially for buildings, from the very high resolution (VHR) airborne images is an important task in urban mapping applications. Nowadays, the deep learning has significantly improved and applied in computer vision applications. Fully Convolutional Networks (FCN) is one of the tops voted method due to their good...
journal article 2018
document
Zhou, K. (author), Gorte, B.G.H. (author)
In VHR(very high resolution) aerial images, shadows indicating height information are valuable for validating or detecting changes on an existing 3D city model. In the paper, we propose a novel and full automatic approach for shadow detection from VHR images. Instead of automatic thresholding, the supervised machine learning approach is...
conference paper 2017
document
Kalogianni, E. (author), Sileryte, R. (author), Lam, M. (author), Zhou, K. (author), Van der Ham, M. (author), Van der Spek, S.C. (author), Verbree, E. (author)
Within this research-driven project, passive WiFi monitoring of WiFi enabled devices was used to detect users (students, employees, visitors) of buildings at the campus of Delft University of Technology to gain insight into the Rhythm of the Campus: the occupation, duration of stay and moving pattern at and between the different facilities ...
conference paper 2015
document
Zhou, K. (author)
Facade reconstruction from terrestrial LiDAR point cloud is affected by both quality of point cloud itself and imperfectness of object recognition algorithms. In the facade, there are many features, which are shared within an object or among objects. For example, within one window, the boundaries of it may share parallel and orthogonal...
master thesis 2015
document
Van der Ham, M. (author), Kalogianni, E. (author), Lam, M. (author), Sileryte, R. (author), Zhou, K. (author), Van der Spek, S.C. (author), Verbree, E. (author), Valks, B. (author)
This Geomatics project was carried out in commission of the Municipality of Rotterdam, Geofort Herwijnen and Facility Management of TU Delft. The research project and this report deliver important fundamental information for scientific/academic paper on Wifi tracking
student report 2014
document
Ye, Y. (author), Zhou, K. (author), Wang, D. (author), Wang, J.C. (author)
journal article 2006
Searched for: author%3A%22Zhou%2C+K.%22
(1 - 13 of 13)