A 3D Surface Data Model for Fast Visualization of 3DCM

2012 ◽  
Vol 594-597 ◽  
pp. 2351-2355
Author(s):  
Qing Guo Wang
Keyword(s):  
Data Model ◽  
3D Model ◽  
Surface Model ◽  
Formal Representation ◽  
3D Gis ◽  
3D Surface ◽  
3D Data ◽  
Surface Data ◽  
Gis Data ◽  
Data Volume

3D data model is an indispensable component to any 3D GIS, and forms the basis of 3D spatial analysis and representation. At present, plenty of representative 3D data models are proposed. However, existing models neglect the display result and the consumption of storage space. Based on the analysis of existing 3D GIS data model, a 3D surface model is proposed for fast visualization in this paper, which is composed of node, segment and triangle. The data structure and formal representation of the proposed 3D surface model is developed to organize and store data of 3D model. Finally, an experiment is made to compare this 3D surface model with other 3D data model, and the result demonstrates that the 3D surface model proposed in this paper is superior to the existing data model in terms of data volume, moreover, it can acquire fast visualization speed.

scholarly journals REVIEW OF 3D GIS DATA FUSION METHODS AND PROGRESS

2018 ◽  
Vol IV-3 ◽  
pp. 121-125 ◽  
Author(s):  
Wei Hua ◽  
Miaole Hou ◽  
Yungang Hu
Keyword(s):  
Data Structure ◽  
Data Fusion ◽  
3D Model ◽  
Data Display ◽  
3D Gis ◽  
Risk Monitoring ◽  
3D Data ◽  
Establishment Method ◽  
Gis Data ◽  
Fusion Methods

3D data fusion is a research hotspot in the field of computer vision and fine mapping, and plays an important role in fine measurement, risk monitoring, data display and other processes. At present, the research of 3D data fusion in the field of Surveying and mapping focuses on the 3D model fusion of terrain and ground objects. This paper summarizes the basic methods of 3D data fusion of terrain and ground objects in recent years, and classified the data structure and the establishment method of 3D model, and some of the most widely used fusion methods are analysed and commented.

Generation of a 3D model of the inside volume of shoes for e-commerce applications using industrial X-ray computed tomography

2021 ◽  
Author(s):  
J Wittmann ◽  
G Herl ◽  
J Hiller
Keyword(s):  
Computed Tomography ◽  
3D Model ◽  
Region Growing ◽  
Surface Model ◽  
Economic Potential ◽  
X Ray ◽  
Internet Users ◽  
Surface Data ◽  
X Ray Computed ◽  
The Individual

Abstract In 2018, 47 % of global internet users had purchased footwear products through the internet, making it the second most popular online shopping category worldwide right after clothing with 57 %. In the same year, on average, about every sixth parcel delivered in Germany (16.3 %) was returned. With the effort and costs that are associated with the return of shoes, the objective of reducing the number of returns for shoes promises an enormous economic potential and helps to reduce the CO2 emissions due to a lower trafic volume. This paper presents a workflow for determining the inside volume surface of shoes using industrial X-ray computed tomography (CT). The fundamental idea is based on the Region Growing (RG) method for the segmentation of the shoe's inner volume. Experiments are performed to illustrate the correlation of image quality and segmentation result. After obtaining the 3D surface model of an individual foot, the inner volume surface data of a scanned shoe can then be registered and evaluated in order to provide a reliable feedback for the customer regarding the accuracy of fit of a shoe and the individual foot on the basis of an overall "metric of comfort" before buying online. This step is not part of the work at hand. Conclusions are drawn and suggestions for improving the robustness and the exibility of the workflow are given, so it can be adapted to various shoe types and implemented in a fully automated measurement process in the future.

Component Model Data Extraction Based on STEP in Virtual Assembly Technology

2014 ◽  
Vol 685 ◽  
pp. 567-570
Author(s):  
He Qun Qiang ◽  
Chun Hua Qian ◽  
Sheng Rong Gong
Keyword(s):  
Data Base ◽  
Data Model ◽  
3D Model ◽  
Data Extraction ◽  
Virtual Assembly ◽  
Component Model ◽  
Information Share ◽  
Data Format ◽  
3D Data ◽  
Assembly Technology

Component model information share is the premise of virtual assembly, but tranditional Component 3D model is not the suitable data format used on Intenet. Realization the transformation from tranditional 3D data to Web-enable data base on STEP standard is feasible. In this paper, we discuss and resolve several problems, such as: Mapping between the EXPRESS data model and the RDBMS, Lexical analysis of STEP file, the tansformation form STEP file to data-base file.

3D Surface Reconstruction from Multiviews for Prosthetic Design

2012 ◽  
pp. 338-351
Author(s):  
Nasrul Humaimi Bin Mahmood
Keyword(s):  
Surface Reconstruction ◽  
3D Model ◽  
Lower Limbs ◽  
Evaluation Methodology ◽  
Prosthetic Design ◽  
Prosthetic Devices ◽  
3D Surface Reconstruction ◽  
Passive Method ◽  
3D Surface ◽  
3D Data

Existing methods that use a fringe projection technique for prosthetic designs produce good results for the trunk and lower limbs; however, the devices used for this purpose are expensive. This chapter investigates the use of an inexpensive passive method involving 3D surface reconstruction from video images taken at multiple views. The design and evaluation methodology, consisting of a number of techniques suitable for prosthetic design, is developed. The method that focuses on fitting the reference model (3D model) of an object to the target data (3D data) is presented. The 3D model is obtained by a computer program while the 3D data uses the shape-from-silhouette technique in an approximately circular motion. The modification of existing model-based reconstruction – mainly on the deformation process of vertices – is discussed, and the results of different objects show a good possibility for using a passive method in prosthetic devices. The methodology developed is shown to be useful for prosthetic designers as an alternative to manual impression during the design.

scholarly journals The Hayabusa2 lander MASCOT on the surface of asteroid (162173) Ryugu – Stereo-photogrammetric analysis of MASCam image data

2019 ◽  
Vol 632 ◽  
pp. L5 ◽  
Author(s):  
F. Scholten ◽  
F. Preusker ◽  
S. Elgner ◽  
K.-D. Matz ◽  
R. Jaumann ◽  
...  
Keyword(s):  
3D Model ◽  
Image Data ◽  
Field Of View ◽  
Surface Model ◽  
3D Surface ◽  
Stereo Processing

After its release and a descent and bouncing phase, the Hayabusa2 lander MASCOT came to a final rest and MASCOT’s camera MASCam acquired a set of images of the surface of Ryugu. With MASCam’s instantaneous field of view of about 1 mrad, the images provide pixel scales from 0.2 to 0.5 mm pixel−1 in the foreground and up to 1 cm pixel−1 for surface parts in the background. Using a stereo-photogrammetric analysis of the MASCam images taken from slightly different positions due to commanded and unintentional movements of the MASCOT lander, we were able to determine the orientation for the different measurement positions. Furthermore, we derived a 3D surface model of MASCOT’s vicinity. Although the conditions for 3D stereo processing were poor due to very small stereo angles, the derived 3D model has about 0.5 cm accuracy in the foreground at 20 cm distance and about 1.5 cm at a distance of 40–50 cm.

3D GIS Data Model for Indoor Route Finding

2006 ◽  
Vol 10 (2) ◽  
pp. 87-95 ◽  
Author(s):  
Chulmin Jun ◽  
Inhye Park ◽  
Keun-Won Ryu ◽  
June-Hwan Koh
Keyword(s):  
Data Model ◽  
3D Gis ◽  
Route Finding ◽  
Gis Data

scholarly journals Experimenting on 3D GIS: The Case of Sennacherib’s South-West Palace at Nineveh

2021 ◽  
Author(s):  
Francesca Cavaliere
Keyword(s):  
3D Model ◽  
3D Gis ◽  
South West ◽  
3D Data ◽  
Simultaneous Visualization ◽  
The Web

Alongside traditional recording in 2D, new tools now allow us to analyze 3D data in archaeology. My case study in a 3D GIS concerns Sennacherib’s South-West palace in Nineveh. The 3D model of the building has been georeferenced. Specific external databases were organized to collect all available data, both for archi-tecture and visual finds, while the associated geometries were organized in different layers according to their content. This allows for the simultaneous visualization of the 3D model with embedded information, which becomes an integral part of it, and not just metadata. In this way, it was possible to create a system that al-lows the full enhancement of the whole of the information belonging to such a rich and complex context through decades of field researches recorded in a variety of ways of differing accuracy. Thanks to coopera-tion with the CRANE project we now strive to make the model a public one on the web.

Considerations for Post-processing Parameters in Mixed-Method 3D Analyses

2021 ◽  
Vol 9 (4) ◽  
pp. 325-337
Author(s):  
Robert Z. Selden ◽  
Lauren N. Butaric ◽  
Kersten Bergstrom ◽  
Dennis Van Gerven
Keyword(s):  
Three Dimensional ◽  
Processing Parameters ◽  
Surface Model ◽  
Digital Repositories ◽  
Computed Tomographic ◽  
Archaeological Data ◽  
3D Data ◽  
Morphometric Analyses ◽  
Smoothing Parameters ◽  
Ct Data

ABSTRACTThe production of three-dimensional (3D) digital meshes of surface and computed tomographic (CT) data has become widespread in morphometric analyses of anthropological and archaeological data. Given that processing methods are not standardized, this leaves questions regarding the comparability of processed and digitally curated 3D datasets. The goal of this study was to identify those processing parameters that result in the most consistent fit between CT-derived meshes and a 3D surface model of the same human mandible. Eight meshes, each using unique thresholding and smoothing parameters, were compared to assess whole-object deviations, deviations along curves, and deviations between specific anatomical features on the surface model when compared with the CT scans using a suite of comparison points. Based on calculated gap distances, the mesh that thresholded at “0” with an applied smoothing technique was found to deviate least from the surface model, although it is not the most biologically accurate. Results have implications for aggregated studies that employ multimodal 3D datasets, and caution is recommended for studies that enlist 3D data from websites and digital repositories, particularly if processing parameters are unknown or derived for studies with different research foci.

ANALISIS MODEL 3D DATA GAYA BERAT DALAM KEGAGALAN PEMBORAN SUMUR RESERVOAR MINYAK DI AREA X

2020 ◽  
Vol 2 (2) ◽  
pp. 62-68
Author(s):  
Ahmad Jahrudin ◽  
Pradityo Riyadi
Keyword(s):  
3D Modeling ◽  
3D Model ◽  
Oil And Gas ◽  
Gravity Data ◽  
Production Well ◽  
Log Data ◽  
3D Data ◽  
Area X

The exploration of oil and gas, especially in Indonesia is experiencing various challenges and varying degrees of difficulty. In this research, the researcher tries to make a 3D modeling from gravity data, where the model will show a structure to determine the central coordinates for drilling. Pertamina has carried out drilling at a location in NTT and it turns out that the well does not produce oil and gas, even though the log data reads an oil showing that the area should have the prospect of producing oil, but the wells that have been drilled do not show any oil or gas, therefore the researchers tried to make a 3D model determine the structure around the production well. In this research, it was seen that the area of the previous drilling point had deviated from the top of the up dome and it was also seen in this structure that the area was deviated by about 3 kilometers and depth must exceed 526 m, the researcher concluded that the drilling point must be at X, Y coordinates.

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