Accuracy Assessment of D-Model for Modeling Wall Attenuation in Indoor Environment

Author(s):  
Shiraz Latif ◽  
Aftab Memon ◽  
Bhawani Chawdhry ◽  
Ryszard J. Zielinski ◽  
Ghazanfarullah Khan
Author(s):  
N. H. Mohd Nasir ◽  
K. N. Tahar

Preserving cultural heritage and historic sites is an important issue. These sites are subjected to erosion and vandalism, and, as long-lived artifacts, they have gone through many phases of construction, damage and repair. It is important to keep an accurate record of these sites using the 3-D model building technology as they currently are, so that preservationists can track changes, foresee structural problems, and allow a wider audience to “virtually” see and tour these sites. Due to the complexity of these sites, building 3-D models is time consuming and difficult, usually involving much manual effort. This study discusses new methods that can reduce the time to build a model using the Unmanned Aerial Vehicle method. This study aims to develop a 3D model of a historical mosque using UAV photogrammetry. In order to achieve this, the data acquisition set of Masjid Lama Nilai, Negeri Sembilan was captured by using an Unmanned Aerial Vehicle. In addition, accuracy assessment between the actual and measured values is made. Besides that, a comparison between the rendering 3D model and texturing 3D model is also carried out through this study.


2018 ◽  
Vol 24 (9) ◽  
pp. 78 ◽  
Author(s):  
Jasim Ahmed Ali AL-Baghdadi ◽  
Hassan Ali Alizze ◽  
Kasim Abed AL-Hussein

Due to the great evolution in digital commercial cameras, several studies have addressed the using of such cameras in different civil and close-range applications such as 3D models generation. However, previous studies have not discussed a precise relationship between a camera resolution and the accuracy of the models generated based on images of this camera. Therefore the current study aims to evaluate the accuracy of the derived 3D buildings models captured by different resolution cameras. The digital photogrammetric methods were devoted to derive 3D models using the data of various resolution cameras and analyze their accuracies. This investigation involves selecting three different resolution cameras (low, medium and high) and evaluating their calibration accuracies. Assessing the accuracy of the three selected cameras in capturing indoor and outdoor objects; and analyzing the accuracy and the quality of the produced models. The study revealed that:1) It is recommended to use the photos of a high-resolution camera for producing precise 3D models of objects in the outdoor environment especially when the camera/object distance is more than 40 m because the accuracy of the  produced models can be  precise (RMSE ±10.36mm) with excellent quality; 2) The Low-resolution camera can be utilised to produce adequate 3D models of object in the indoor environment (RMSE ±6.32mm) especially when the camera/object distance is less than 40 m.  


2014 ◽  
Author(s):  
Robert J. Wolter ◽  
Kassandra Hauptmann ◽  
Alycia Hund
Keyword(s):  

2020 ◽  
Vol 52 ◽  
pp. 55-61
Author(s):  
Ettore Potente ◽  
Cosimo Cagnazzo ◽  
Alessandro Deodati ◽  
Giuseppe Mastronuzzi

Author(s):  
Juil Jeon ◽  
Juyoung Kim ◽  
Myoungin Ji ◽  
Youngsu Cho ◽  
Andrea Lingua ◽  
...  

1999 ◽  
Author(s):  
M. Trunov ◽  
S. Grinshpun ◽  
W. Friedman ◽  
K. Choe ◽  
K. Willeke
Keyword(s):  

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