A Research on Digital City Three-Dimensional Visualization System Based on Skyline

2014 ◽  
Vol 580-583 ◽  
pp. 2745-2748 ◽  
Author(s):  
Hong Bao Dai ◽  
Xiang Jun Yue ◽  
Ji Ying Xu
Keyword(s):  
3D Visualization ◽  
System Development ◽  
Three Dimensional ◽  
Basic Operation ◽  
Digital City ◽  
Landscape Model ◽  
Human Beings ◽  
Visualization System ◽  
Aerial Photos ◽  
Terrain Model

As an important living place for human beings, city is regarded as a main place for the birth, spread and development of human civilization. This paper, based on the principle of system development and combining with the need of building “Digital City”, makes an overall design of the “Digital City” 3D visualization system. Firstly, a 3D ground objects model, i.e. .x files, is made through inputting the ground objects of the experimental area into 3DSMAX, then, the .x files are converted to .xpc files in order to achieve a better displaying effect in producing a 3D landscape. Secondly, the author makes corresponding pre-processing to the aerial photos, satellite images, topographic data, digital elevation models and a variety of vector geographic data, and then superimposes and loads these data into Terra Builder module of Skyline software, which generates 3D topography landscape, that is, .MPT files and forms the terrain database required in Terra Explorer Pro software. Next, a 3D landscape is preliminarily established by inputting the 3D terrain model and the 3D ground objects model, i.e. .MPT files and .xpl files, in Terra Explorer Pro, and by editing a real and accurate 3D geographic model and a real Digital City 3D landscape model, that is, FLY files, are respectively formed. Finally, on the basis of the 3D landscape model, the system is developed by using Visual Basic + TerraDeveloper and the basic operation of 3D, spatial analysis, visible analysis and other basic functions are preliminarily achieved

A novel three-dimensional visualization system revealed an essential adaptive angiogenic response during the early phase of pulmonary hypertension

2020 ◽  
Vol 41 (Supplement_2) ◽  
Author(s):  
T Fujiwara ◽  
N Takeda ◽  
M Hatano ◽  
S Nishimura ◽  
I Komuro
Keyword(s):  
Pulmonary Hypertension ◽  
Early Phase ◽  
3D Visualization ◽  
Hypoxia Inducible Factor ◽  
Three Dimensional ◽  
Right Heart Failure ◽  
Wall Thickening ◽  
Funding Source ◽  
Vegf Expression ◽  
Visualization System

Abstract Background Pulmonary hypertension (PH) is characterized by increased pulmonary vascular resistance and right heart failure with progressive narrowing or occlusion of the pulmonary artery. However, the assessment of vascular remodeling is mostly limited to averaged increases in wall thickening, and even the role of vascular endothelial growth factor (VEGF), remains incompletely understood; Although abundantly expressed VEGF is expected to elicit angio-obliteration and the knockout of hypoxia inducible factor (HIF) prevents PH in mice, VEGF inhibitor Sugen exacerbates hypoxia (Hx)-induced PH model, which is referred to as VEGF paradox. Purpose To analyze three-dimensional (3D) spatiotemporal changes of pulmonary microstructure and function, which reflect the disease activity and lead to resolve the paradox. Methods and results We developed a novel 3D visualization system of microstructural networks in whole mouse organ with single-cell resolution, using combined tissue clearing technique called CUBIC and multiphoton excitation microscope. The system enabled the simultaneous 3D evaluation of microvascular structure, invaded macrophages and fibrosis with effective penetration of several mm (whole organ). Three-dimensional observations of PH mice models including Hx, Sugen/Hx, and human-like Alk1+/− hereditary PH models, revealed that not only inward (negative) microvessel remodeling with stenosis, but also marked elongation of microvascular ECs, was evident except Sugen/Hx model at the early phase, which had not been detected by 2D histological sections. Comparable transcriptome analysis revealed that PGC1α, which regulates HIF-independent VEGF expression and angiogenesis, plays an important role in the characteristic response for mitochondrial and microvascular maintenance. PGC1α was up-regulated in the early phage in Hx and Alk1+/− PH models with microvascular angiogenetic change, whereas Sugen/Hx-model did not increase PGC1α expression and did not show microvascular remodeling. Furthermore pulmonary ECs-specific PGC1α-deficient mice exacerbated Hx-PH model with decreased VEGF expression and microvessel density, and administration of Baicalin, a flavonoid enhancing PGC1α expression, ameliorated Hx-PH model with increased VEGF expression. Conclusions The 3D visualization system disclosed an unexpected change of angiogenic microvascular structure in the early phage of PH, which is regulated by EC PGC1α. Microvascular angiogenesis which is induced by up-regulation in PGC1α -VEGF pathway is a crucial factor for compensation of PH in the early phase, which provides a potential novel therapeutic target for PH. Figure 1 Funding Acknowledgement Type of funding source: Public grant(s) – National budget only. Main funding source(s): JSJP

Research on City 3D Modeling and Application Based on Skyline

2012 ◽  
Vol 594-597 ◽  
pp. 2394-2397
Author(s):  
Jian Cui ◽  
Dong Ling Ma ◽  
Fei Cai
Keyword(s):  
Urban Design ◽  
Computer Technology ◽  
Traditional Method ◽  
3D Visualization ◽  
Rapid Development ◽  
Three Dimensional ◽  
Computer Software ◽  
Communications Technology ◽  
Digital City ◽  
Simple Method

With the rapid development of computer technology, communications technology, and other related technologies, the Digital City has become a hot topic of current research. The traditional method of constructing digital city based on ArcGis is very complex, the type of computer software that related is much more, and the interaction between the software is poor. For the traditional method of digital urban design is difficult to design and visualization effect is poor, this paper builds the techniques of campus apartment modeling based on the skyline combined specific examples of campus apartments, realizes three dimensional (3D) visualization and query and analysis functions of the campus apartment system and proposes a simple method of creating 3D landscape efficiently.

Information Visualization with Text Data Mining for Knowledge Discovery Tools in Bioinformatics

2005 ◽  
Vol 277-279 ◽  
pp. 259-265
Author(s):  
Jin Ah Park ◽  
Chang Su Lee ◽  
Jong C. Park
Keyword(s):  
Data Mining ◽  
3D Visualization ◽  
Three Dimensional ◽  
Mitogen Activated Protein Kinase ◽  
Text Data ◽  
Text Data Mining ◽  
Visualization System ◽  
Source Data ◽  
Mitogen Activated Protein ◽  
Available Information

An abundant amount of information is produced in the digital domain, and an effective information extraction (IE) system is required to surf through this sea of information. In this paper, we show that an interactive visualization system works effectively to complement an IE system. In particular, three-dimensional (3D) visualization can turn a data-centric system into a user-centric one by facilitating the human visual system as a powerful pattern recognizer to become a part of the IE cycle. Because information as data is multidimensional in nature, 2D visualization has been the preferred mode. However, we argue that the extra dimension available for us in a 3D mode provides a valuable space where we can pack an orthogonal aspect of the available information. As for candidates of this orthogonal information, we have considered the following two aspects: 1) abstraction of the unstructured source data, and 2) the history line of the discovery process. We have applied our proposal to text data mining in bioinformatics. Through case studies of data mining for molecular interaction in the yeast and mitogen-activated protein kinase pathways, we demonstrate the possibility of interpreting the extracted results with a 3D visualization system.

scholarly journals Immersive 5G Virtual Reality Visualization Display System Based on Big-Data Digital City Technology

2021 ◽  
Vol 2021 ◽  
pp. 1-9
Author(s):  
Fei Tian
Keyword(s):  
Virtual Reality ◽  
Big Data ◽  
Visual Experience ◽  
Three Dimensional ◽  
Visual Display ◽  
Digital City ◽  
Display System ◽  
Visualization System ◽  
Display Mode ◽  
Interactive Operations

The virtual reality visual display system creates a realistic virtual product display system, allowing users to swim in a three-dimensional virtual environment and perform interactive operations, fully simulating the process of shopping selection and payment in reality, so that users have an immersive feeling. The purpose of this article is to realize the design of an immersive 5G virtual reality visual display system through big-data digital city technology. This paper uses big-data digital city technology to design and implement an immersive virtual reality visualization system from the three-dimensional display mode of vision, hearing, and touch, creating a real and interactive three-dimensional visualization environment for users to have a more intuitive visual experience. The experimental results of this paper show that the smoothness of the virtual reality visualization system test can reach 60FPS, the excellent rate reaches nearly 33%, and the model scene-realistic feedback excellent rate is about 62.5%.

scholarly journals Use of the heads-up NGENUITY 3D Visualization System for vitreoretinal surgery: a retrospective evaluation of outcomes in a French tertiary center

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Pierre Kantor ◽  
Frédéric Matonti ◽  
Fanny Varenne ◽  
Vanessa Sentis ◽  
Véronique Pagot-Mathis ◽  
...  
Keyword(s):  
3D Visualization ◽  
Three Dimensional ◽  
Vitreoretinal Surgery ◽  
Retrospective Evaluation ◽  
Visualization System ◽  
Surgical Microscope ◽  
Tertiary Center ◽  
Visualization Systems ◽  
Conventional Microscopy ◽  
Anatomical Outcomes

AbstractHeads-up three-dimensional (3D) surgical visualization systems allow ophthalmic surgeons to replace surgical microscope eyepieces with high-resolution stereoscopic cameras transmitting an image to a screen. We investigated the effectiveness and safety of the heads-up NGENUITY 3D Visualization System in a retrospective evaluation of 241 consecutive vitreoretinal surgeries performed by the same surgeon using conventional microscopy (CM group) over a 1-year period versus the NGENUITY System (3D group) over a consecutive 1-year period. We included for study vitreoretinal surgeries for treatment of retinal detachment (RD) (98 surgeries), macular hole (MH) (48 surgeries), or epiretinal membrane (ERM) (95 surgeries). A total of 138 and 103 eyes were divided into 3D and CM groups, respectively. We found no differences in 3-month postoperative rates of recurrence of RD (10% versus 18%, p = 0.42), MH closure (82% versus 88%, p = 0.69), or decrease in central macular thickness of ERMs (134 ± 188 µm versus 115 ± 105 µm, p = 0.57) between the 3D and CM groups, respectively. Surgery durations and visual prognosis were also similar between both groups. We consolidate that the NGENUITY System is comparable in terms of visual and anatomical outcomes, giving it perspectives for integration into future robotized intervention.

Cost-Effective 3D Stereo Visualization for Creative Learning

2019 ◽  
pp. 239-251
Author(s):  
R. S. Kamath ◽  
R. K. Kamat
Keyword(s):  
3D Visualization ◽  
Learning Experience ◽  
Three Dimensional ◽  
Cost Effective ◽  
Visualization Tool ◽  
Visualization System ◽  
Creative Learning ◽  
Technological Platform ◽  
Artificial World

Using a pedagogic case study of development of three dimensional (3D) stereo visualization suite, in this chapter, the authors exemplify the emerging paradigm shift of educational technology progressively from simulation to virtual reality (VR). The authors present the transformation of higher education archetypes using VR, which is poised to create a whole new meaning for the young learners. It mainly personifies the computer-generated three-dimensional environments that give the viewer an intense feeling of being immersed in an artificial world. The authors clearly demonstrate exploiting a 3D stereo visualization system in learning environment for bringing in an experiential learning experience of real industrial scenario in the classroom itself. They present the design and development of 3D visualization tool that embodies complex datasets in virtual environment. Thus, the chapter epitomizes the significance of VR in edification that impacts creative learning without using real tools on a less sophisticated technological platform.

A Continuous and Reversible LOD Algorithm for Highway Terrain

2011 ◽  
Vol 467-469 ◽  
pp. 1482-1487
Author(s):  
Xin Sha Fu ◽  
Si Quan Mo ◽  
Hai Feng Li
Keyword(s):  
3D Visualization ◽  
Scheduling Algorithm ◽  
Weighted Average ◽  
Model Simplification ◽  
Visualization System ◽  
Terrain Model ◽  
Folding Algorithm ◽  
Vertex Degrees ◽  
Progressive Meshes ◽  
Grid Based

In view of the inherent contradiction between mass data and real-time browsing in Highway 3D Visualization System, this paper proposes an edge folding algorithm for weighted average elevation base on vertex degrees, which will improve the model simplification effective. In the process of building a continuous LOD model, the algorithm uses mesh line to blocky process the terrain model to eliminate the adverse effects of long and narrow triangles, adopts Hoppe’s reversible progressive meshes construction algorithm to build grid-based LOD terrain model of continuous reversible, finally adopts LOD scheduling algorithm based on viewpoint, realizing multi-resolution terrain display of continuous reversible.

scholarly journals 3D Interactive Visualization Method of Urban Waterlogging Based on Cesium

2019 ◽  
Vol 1 ◽  
pp. 1-1
Author(s):  
Xu Zhang ◽  
Wei Zhou ◽  
Jie Shen ◽  
Lukáš Herman ◽  
Yixian Du
Keyword(s):  
3D Visualization ◽  
Three Dimensional ◽  
Interactive Visualization ◽  
Model Parameters ◽  
Visualization Method ◽  
Process Data ◽  
Visualization System ◽  
Simulation Based ◽  
Simulation Results ◽  
3D Scene

<p><strong>Abstract.</strong> Urban waterlogging, as a common natural disaster in China, seriously restricted the development of society. Nowadays, while the computer technology is developing continuously, the urban waterlogging model is also constantly improved. These models can simulate the process of urban waterlogging, but the simulation results are not intuitive. So it is difficult for users to understand how the model works. Therefore, it is important to find a way to show the simulation results so that people can see the waterlogging simulation intuitively. Cesium, as a three-dimensional visualization platform, can reproduce the process of the urban waterlogging. It will make sense if we could show the simulation results on the Cesium platform. Nowadays, many studies focus on both urban waterlogging and visualization methods. However, there are fewer studies on the combination of the two, especially the interactive visualization of urban waterlogging under parameter adjustment. Therefore, this paper mainly focuses on urban three-dimensional interactive visualization method based on Cesium.</p><p>On the one hand, the three-dimensional visualization of the urban waterlogging simulation facilitates the intuitive expression of the simulation results. Without visualization, the results of the simulation are only some complicated and unintuitive figures for most non-experts. On the other hand, visualization based on the Cesium platform can better adapt to the cross-platform application. It can better meet the needs of different terminal devices of different users for the visualization platform, so that users can obtain the disaster information more accurately, consistently and intuitively. It is conducive for management departments to respond to sudden disasters more quickly and efficiently.</p><p>This research aims to propose a three-dimensional dynamic interactive visualization method for urban waterlogging. Particularly, we hope to find out how to integrate urban waterlogging model and 3D visualization platform. With this 3D visualization platform, we can combine the advantages of the SWMM (Storm Water Management Model) and Cesium platform. Using this platform, it will be easier and more effective to respond to disasters for the masses and management departments.</p><p>The following two issues are resolved in this study: i) How do model parameters affect the urban waterlogging simulation and visualization results? ii) How to integrate SWMM and Cesium 3D visualization platform?</p><p>In order to address the above research objectives, we will apply the following methodologies: i) We will analyse the parameters of the SWMM for the urban waterlogging visualization. Under the premise of understanding the development process of the urban waterlogging, we will analyse the modelling principle of the urban waterlogging, the mechanism of each part of the model separately. Then, we will find out the method of determining the model parameters of urban waterlogging and its influence on the simulation visualization results. ii) We will study integration methods of urban waterlogging model and 3D visualization platform. We will analyse the mechanism and process of urban waterlogging. We will also calculate the urban waterlogging process data by the SWMM, and establish a three-dimensional visualization platform by the node.js and Cesium, which can dynamically show the process of urban waterlogging. iii) We will complete the design and implementation of the interactive visualization platform of urban waterlogging. According to the above research, taking the Xianlin Campus of Nanjing Normal University as an example, we will build a dynamic interactive visualization system of urban waterlogging simulation based on Cesium. We will also verify the effectiveness of the system by comparing it with actual flood situation.</p><p>With this study, we expect to answer how model parameters affect the urban waterlogging simulation and visualization results. As expected results, we plan to build an interactive visualization system of urban waterlogging simulation based on Cesium, publish the flood calculation results into the 3D scene. This will make urban waterlogging process shown in the 3D scene. This visualization system is designed for different users, including specialists, government and individual. It means that you can use the system easily even if you are non-cartographers or non-IT-specialists.</p>

scholarly journals Anatomical Study of the Hepatic Veins in Segment 4 of the Liver Using Three-Dimensional Visualization

2021 ◽  
Vol 8 ◽  
Author(s):  
Jun Zhang ◽  
Xiaochao Guo ◽  
Qilu Qiao ◽  
Jianxun Zhao ◽  
Xin Wang
Keyword(s):  
Hepatic Vein ◽  
3D Visualization ◽  
Venous Blood ◽  
Three Dimensional ◽  
Morphological Characteristics ◽  
Hepatic Veins ◽  
Hepatic Surgery ◽  
Visualization System ◽  
Vein System ◽  
Visualization Technology

Objective: The current study aimed to examine the anatomical structure of the hepatic vein of segment IV liver (S4) of the liver using three-dimensional (3D) visualization technology in order to explore the surgical value of the middle hepatic vein (MHV) manipulation and highlight the importance of current research in hepatic surgery.Methods: Between January 2014 and December 2019, 52 patients with abdominal diseases(not including hepatic disease) were selected for multiphasic computed tomography-enhanced scans of the upper abdomen. A 3D visualization system was utilized to display the structural details of the hepatic veins in S4 of their livers. Couinaud's eight-segment classification system was used to denote the liver' sections.Results: The constructed 3D model clearly displayed vascular morphological characteristics and their location in the liver, hepatic artery and vein system, and portal vein system. Of the 52 patients, 43 had an umbilical fissure vein (UFV) (82.7%), 19 had an accessory S4 liver vein (36.5%), 16 had both a UFV (30.8%) and an accessory S4 liver vein, and 6 had neither (11.5%). A total of 79% of the patients with a UFV and 74.2% of those with an accessory S4 liver vein had venous blood returning into the left hepatic vein.Conclusion: 3D visualization technology was used to determine hepatic venous return of S4 hepatic veins and was found to improve the safety of evaluation in hepatic surgery.

scholarly journals Correlation among Earthwork and Cropmark Anomalies within Archaeological Landscape Investigation by Using LiDAR and Multispectral Technologies from UAV

Drones ◽  
2020 ◽  
Vol 4 (4) ◽  
pp. 72
Author(s):  
Diego Ronchi ◽  
Marco Limongiello ◽  
Salvatore Barba
Keyword(s):  
Vegetation Indices ◽  
Three Dimensional ◽  
Digital Terrain Model ◽  
Buried Structures ◽  
Aerial Photos ◽  
Terrain Model ◽  
Survey Techniques ◽  
Digital Terrain ◽  
Vegetation Maps ◽  
The One

This project aimed to systematically investigate the archaeological remains of the imperial Domitian villa in Sabaudia (Italy), using different three-dimensional survey techniques. Particular attention in the research was paid to the identification and documentation of traces that buried structures left on the surface occupied by the villa, which extended for 46 hectares, an area that was fully covered with structures. Since a dense pine forest was planted during the 1940s and is currently covering the site, this contribution investigates particularly the correlation among the presence of cropmarks, identifiable with the processing of multispectral maps and vegetation indices from RGB images, and earthwork anomalies identified in a Digital Terrain Model (DTM) built, by utilizing a light detection and ranging (LiDAR) flight from an Unmanned Aerial Vehicle (UAV). The study demonstrates how the use of vegetation maps—calculated starting from RGB and multispectral aerial photos—can provide a more expeditious preliminary analysis on the position and extension of areas characterized by the presence of buried structures, but also that, in order to investigate in-depth a context in similar conditions, the most effective approach remains the one based on LiDAR technology. The integration between the two techniques may prove fruitful in limiting the extension of the areas to be investigated with terrestrial survey techniques.

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