Creating 3D Models from Sketch Plans for Spatial Landscape Evaluation

2012 ◽  
Vol 1 (1) ◽  
pp. 42-55 ◽  
Author(s):  
Bauke de Vries ◽  
Joop van den Tillaart ◽  
Kymo Slager ◽  
Rona Vreenegoor ◽  
Joran Jessurun
Keyword(s):  
3D Model ◽  
Specific Area ◽  
3D Models ◽  
Physical Models ◽  
Landscape Type ◽  
3D Objects ◽  
Landscape Types ◽  
Sketch Plan ◽  
High Level ◽  
2D Sketch

2D sketch plans are hard to interpret for non-professionals and do not contain enough information for plan evaluation. Simple extrusion of 2D sketch plans into 3D will not suffice. This problem is faced by stakeholders in the early stages of the plan design process. Landscape types play an important role in bridging the gap between abstract 2D plans and 3D physical models. A landscape type consists of pictures from an existing landscape, a 3D model and additional attributes providing quantitative data. Through a matching algorithm, 2D landscape components in the sketch plan are replaced by 3D objects. Multiple 3D plans can be created from a specific area with different landscape types. These 3D plans are visualized with a high level of realism and they can be evaluated using the additional data. In this paper examples are shown for an apartment district and a villa district under different energy scenarios. The visual consequences of strategic energy decisions become apparent in the 3D model.

A 3D Engineering Model Retrieval Algorithm Based on Relevance Feedback and Features Combination

2013 ◽  
Vol 579-580 ◽  
pp. 340-344
Author(s):  
Ting Zhuang ◽  
Xu Tang Zhang ◽  
Zhen Xiu Hou
Keyword(s):  
Relevance Feedback ◽  
3D Model ◽  
3D Models ◽  
Semantic Knowledge ◽  
Retrieval Algorithm ◽  
Engineering Model ◽  
Feedback Information ◽  
Low Level ◽  
Model Retrieval ◽  
High Level

In order to reuse 3D models and design knowledge efficiently, a number of 3D model retrieval algorithms based on content features of models have been proposed in recent years. Although, the features-based methods have achieved some progress, there are two limitations stilly. The first, single content feature cant be suit for all kinds of 3D models; different features have different strengths and weakness. The second, semantic gap, the semantic of model is independent from low-level characteristics. For those two issues, we present a 3D engineering model retrieval algorithm based on relevance feedback and features combination in this paper. The proposed method takes advantage of multiple features by allying them with weights. In the retrieval process, our method utilizes the Particle Swarm Optimization to update the weights dynamically based on users relevance feedback information in order to narrowing the gap between high-level semantic knowledge and low-level content features. The Experiments, based on publicly available 3D model database Engineering Shape Benchmark (ESB) developed by Purdue University, suggested that the proposed approach has better retrieval ability than traditional ones.

scholarly journals INTERACTIVE ONLINE VISUALIZATION OF COMPLEX 3D GEOMETRIES

2019 ◽  
Vol XLII-2/W9 ◽  
pp. 173-180 ◽  
Author(s):  
A.-M. Boutsi ◽  
C. Ioannidis ◽  
S. Soile
Keyword(s):  
3D Model ◽  
Complex Geometry ◽  
User Interaction ◽  
Archaeological Site ◽  
3D Models ◽  
Web Browser ◽  
Metadata Repository ◽  
3D Scene ◽  
High Level

<p><strong>Abstract.</strong> In the last decade 3D datasets of the Cultural Heritage field have become extremely rich and high detailed due to the evolution of the technologies they derive from. However, their online deployment, both for scientific and general public purposes is usually deficient in user interaction and multimedia integration. A single solution that efficiently addresses these issues is presented in this paper. The developed framework provides an interactive and lightweight visualization of high-resolution 3D models in a web browser. It is based on 3D Heritage Online Presenter (3DHOP) and Three.js library, implemented on top of WebGL API. 3DHOP capabilities are fully exploited and enhanced with new, high level functionalities. The approach is especially suited to complex geometry and it is adapted to archaeological and architectural environments. Thus, the multi-dimensional documentation of the archaeological site of Meteora, in central Greece is chosen as the case study. Various navigation paradigms are implemented and the data structure is enriched with the incorporation of multiple 3D model viewers. Furthermore, a metadata repository, comprises ortho-images, photographic documentation, video and text, is accessed straight forward through the inspection of the main 3D scene of Meteora by a system of interconnections.</p>

scholarly journals PROCEDURAL 3D MODELLING FOR TRADITIONAL SETTLEMENTS. THE CASE STUDY OF CENTRAL ZAGORI

2017 ◽  
Vol XLII-2/W3 ◽  
pp. 369-376 ◽  
Author(s):  
D. Kitsakis ◽  
E. Tsiliakou ◽  
T. Labropoulos ◽  
E. Dimopoulou
Keyword(s):  
Cultural Heritage ◽  
Large Scale ◽  
3D Model ◽  
Information Science ◽  
Research Work ◽  
3D Models ◽  
3D Modelling ◽  
3D Objects ◽  
Technological Advances ◽  
3D Scene

Over the last decades 3D modelling has been a fast growing field in Geographic Information Science, extensively applied in various domains including reconstruction and visualization of cultural heritage, especially monuments and traditional settlements. Technological advances in computer graphics, allow for modelling of complex 3D objects achieving high precision and accuracy. Procedural modelling is an effective tool and a relatively novel method, based on algorithmic modelling concept. It is utilized for the generation of accurate 3D models and composite facade textures from sets of rules which are called Computer Generated Architecture grammars (CGA grammars), defining the objects’ detailed geometry, rather than altering or editing the model manually. In this paper, procedural modelling tools have been exploited to generate the 3D model of a traditional settlement in the region of Central Zagori in Greece. The detailed geometries of 3D models derived from the application of shape grammars on selected footprints, and the process resulted in a final 3D model, optimally describing the built environment of Central Zagori, in three levels of Detail (LoD). The final 3D scene was exported and published as 3D web-scene which can be viewed with 3D CityEngine viewer, giving a walkthrough the whole model, same as in virtual reality or game environments. This research work addresses issues regarding textures' precision, LoD for 3D objects and interactive visualization within one 3D scene, as well as the effectiveness of large scale modelling, along with the benefits and drawbacks that derive from procedural modelling techniques in the field of cultural heritage and more specifically on 3D modelling of traditional settlements.

scholarly journals Three-dimensional physical models of sedimentary basins as a resource for teaching-learning of geology

2018 ◽  
Vol 14 (4) ◽  
pp. 379-384 ◽  
Author(s):  
Celso Dal Ré Carneiro ◽  
Kauan Martins dos Santos ◽  
Thiago Rivaben Lopes ◽  
Filipe Constantino dos Santos ◽  
Jorge Vicente Lopes da Silva ◽  
...  
Keyword(s):  
Computational Models ◽  
Three Dimensional ◽  
Spatial Vision ◽  
Sedimentary Basins ◽  
3D Models ◽  
Physical Models ◽  
3D Objects ◽  
Three Dimensional Modeling ◽  
Three Dimensional Models ◽  
Teaching Learning

Three-dimensional modeling connects several fields of knowledge, both basic and applied. 3D models are relevant in educa-tional research because the manipulation of 3D objects favors students' acquisition of spatial vision, but in the Geosciences, there are few didactic publications in Portuguese on the subject. The authors develop an educational research project to produce three-dimensional models of didactic examples of sedimentary basins: the Paraná Basin (Silurian-Upper Cretaceous), the Tau-baté and the São Paulo basins (Neogene). 3D-compatible files will be produced to compose didactic and display material, from maps and geological-structural profiles of certain regional stratigraphic levels of each basin. The research challenges are: (a) to obtain an overview of the available resources for 3D modeling; (b) to evaluate their potential, characteristics, advantages and limitations for applications in Geology and Geosciences; (c) to create computational models of the basins; (d) to produce at least one physical model based on one of the computational models of each basin. The resources will subsidize training work-shops for in-service teachers, technical-scientific articles and Internet pages.

scholarly journals 3D DIGITIZATION OF FEATURELESS DENTAL MODELS USING CLOSE RANGE PHOTOGRAMMETRY AIDED BY NOISE BASED PATTERNS

2018 ◽  
Vol 16 (3) ◽  
pp. 297 ◽  
Author(s):  
Željko Santoši ◽  
Igor Budak ◽  
Mario Šokac ◽  
Tatjana Puškar ◽  
Đorđe Vukelić ◽  
...  
Keyword(s):  
3D Model ◽  
3D Models ◽  
Physical Models ◽  
3D Scanner ◽  
Close Range Photogrammetry ◽  
Close Range ◽  
Dental Models ◽  
Visual Properties ◽  
3D Digitization ◽  
3D Digitizing

Development and improvement of 3D digitizing systems provide for the ability to digitize a growing number of materials and geometrical forms of greater complexity. This paper presents the application of 3D digitizing system using close range photogrammetry on the upper jaw cast in plaster in order to obtain its 3D model. Because of the low visual characteristics of gypsum, such as color and texture, many questions arise about the possibility of applying this particular method to this type of physical models. In order to overcome bad visual properties of gypsum, this paper analyzes the possibility of the photogrammetry method application supported by the projected light texture which is based on patterns in the form of noise-obtained  mathematically modeled functions. In order to determine the selected image for light texture which gives the better results, an experiment was designed and carried out. Only two images were tested. One image is selected based on previous research and the other one was generated by the Matlab function for uniformly distributed random numbers. For validation and a comparative analysis of the results, an object of 3D digitization was generated with and without projected light texture. CAD inspection was applied for the analysis of the obtained 3D digitizing results. 3D model obtained by approved professional optical 3D scanner as a reference was used. The results in this paper confirm better accuracy of 3D models obtained with the use of light textures, but this approach requires additional hardware and setup adjustment for images acquisition.

scholarly journals APPLICATION OF PARAMETRIZATION OF CHARACTERISTIC CROSS SECTIONS OF OBJECTS FOR INDIRECT PARAMETRIZATION OF THEIR 3D MODELS IN AUTOCAD CAD

2021 ◽  
pp. 99-107
Author(s):  
Tetjana Gnitetska ◽  
Galyna Gnitetska ◽  
Dmitriy Motulyov
Keyword(s):  
Cross Sections ◽  
3D Model ◽  
Longitudinal Section ◽  
3D Models ◽  
Educational Process ◽  
Engineering Practice ◽  
Design Work ◽  
3D Objects ◽  
Typical Part ◽  
Kyiv Polytechnic Institute

The developed algorithm of indirect parametrization of 3d model of a typical part by means of parametrization of its longitudinal section is presented in the work. Controlling the shape of 3d objects by parameterizing their 2d cross-sections allows, using AutoCAD CAD, to create variants of electronic models of parts, the same type in geometry and different in size characteristics. This saves resources that are spent on design work. The proposed algorithm for creating parameterized 3d models in the CAD environment AutoCAD can be used in engineering practice. Currently, methodological developments have been introduced into the educational process at the Kyiv Polytechnic Institute named after Igor Sikorsky when teaching the course "Engineering and Computer Graphics".

scholarly journals Digital 3D-Objects Visualization in Forming Virtual Exhibitions

2020 ◽  
Vol 23 (3) ◽  
pp. 418-432 ◽  
Author(s):  
Nikolay Evgenvich Kalenov ◽  
Sergey Alexandrovich Kirillov ◽  
Irina Nikolaevna Sobolevskaya ◽  
Aleksandr Nikolaevich Sotnikov
Keyword(s):  
3D Model ◽  
3D Models ◽  
Electronic Library ◽  
Scientific Heritage ◽  
Museum Exhibits ◽  
3D Objects ◽  
Interactive Animation ◽  
Wide Range ◽  
Interactive 3D ◽  
3D Web

The paper is presents approaches to solving the problem of creating realistic interactive 3D web-collections of museum exhibits. The presentation of 3D-models of objects based on oriented polygonal structures is considered. The method of creating a virtual collection of 3D-models using interactive animation technology is described. It is also shown how a full-fledged 3D-model is constructed on the basis of individual exposure frames using photogrammetry methods. The paper assesses the computational complexity of constructing realistic 3D-models. For the creation of 3D-models in order to provide them to a wide range of users via the Internet, the so-called interactive animation technology is used. The paper presents the differences between the representations of full-fledged 3D-models and 3D-models presented in the form of interactive multiplication. The technology of creating 3D-models of objects from the funds of the State Biological Museum named K.A Timiryazev and the formation on their basis of the digital library “Scientific Heritage of Russia” of a virtual exhibition dedicated to the scientific activities of M.M. Gerasimov and his anthropological reconstructions, and vividly demonstrating the possibility of integrating information resources by means of an electronic library. The format of virtual exhibitions allows you to combine the resources of partners to provide a wide range of users with collections stored in museum, archival and library collections.

scholarly journals Landscape change patterns at three stages of the construction and operation of the TGP

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Ruikang Li ◽  
Yangbing Li ◽  
Bo Li ◽  
Dianji Fu
Keyword(s):  
Landscape Pattern ◽  
Landscape Change ◽  
Ecological Security ◽  
Three Gorges ◽  
Temporal Characteristics ◽  
Landscape Type ◽  
The Three Gorges ◽  
Landscape Types ◽  
Landscape Ecological ◽  
Landscape Ecological Security

AbstractAnalyses of landscape change patterns that are based on elevation and slope can not only provide reasonable interpretations of landscape patterns but can also help to reveal evolutionary laws. However, landscape change patterns and their model in different landforms of the typical watershed in the Three Gorges Reservoir Area (TGRA) has not been quantified and assessed effectively. As a complex geographical unit, the ecological environment in the middle reach of the Yangtze River has experienced great changes due to the construction of the Three Gorges Project (TGP) and its associated human activities. Here, based mainly on a digital elevation model (DEM) and remotely sensed images from 1986, 2000, 2010, and 2017 and by using GIS technology, speeds/ trends of landscape change, the index of landscape type change intensity, landscape pattern indices, and landscape ecological security index, the spatial and temporal evolution characteristics of different elevations, slopes, and buffer landscape types were analyzed in typical watersheds, as well as an evolutionary model of the landscape pattern. The results indicated that (1) the landscape types along with the land classification and buffer zone that were influenced by the TGR construction have undergone a phased change, with the period 2000–2010 being the most dramatic period of landscape evolution during the impoundment period; (2) landscape type shifts from human-dominated farmland to nature-driven forestland and shrub-land as elevations, slopes and buffer distances increased. The landscape has shifted from diversity to relative homogeneity; (3) land types and buffer zones played essential roles in the landscape pattern index, which is reflected in the differences in landscape type indices for spatial extension and temporal characteristics. The results of this paper illustrate the spatial–temporal characteristics of various landscape types at three distinct stages in the construction of the TGR. These findings indicate that the landscape ecological security of the watershed is improving year by year. The follow-up development of the TGRA needs to consider the landscape change patterns of different landforms.

scholarly journals Immersive Gesture Interfaces for Navigation of 3D Maps in HMD-Based Mobile Virtual Environments

2018 ◽  
Vol 2018 ◽  
pp. 1-11 ◽  
Author(s):  
Yea Som Lee ◽  
Bong-Soo Sohn
Keyword(s):  
Virtual Environments ◽  
User Study ◽  
Simple Algorithm ◽  
3D Models ◽  
Google Earth ◽  
Depth Camera ◽  
Immersive Virtual Reality ◽  
Head Mounted Displays ◽  
Gesture Interfaces ◽  
High Level

3D maps such as Google Earth and Apple Maps (3D mode), in which users can see and navigate in 3D models of real worlds, are widely available in current mobile and desktop environments. Users usually use a monitor for display and a keyboard/mouse for interaction. Head-mounted displays (HMDs) are currently attracting great attention from industry and consumers because they can provide an immersive virtual reality (VR) experience at an affordable cost. However, conventional keyboard and mouse interfaces decrease the level of immersion because the manipulation method does not resemble actual actions in reality, which often makes the traditional interface method inappropriate for the navigation of 3D maps in virtual environments. From this motivation, we design immersive gesture interfaces for the navigation of 3D maps which are suitable for HMD-based virtual environments. We also describe a simple algorithm to capture and recognize the gestures in real-time using a Kinect depth camera. We evaluated the usability of the proposed gesture interfaces and compared them with conventional keyboard and mouse-based interfaces. Results of the user study indicate that our gesture interfaces are preferable for obtaining a high level of immersion and fun in HMD-based virtual environments.

scholarly journals UNDERWATER PHOTOGRAMMETRY DIGITAL SURFACE MODEL (DSM) OF THE SUBMERGED SITE OF THE ANCIENT LIGHTHOUSE NEAR QAITBAY FORT IN ALEXANDRIA, EGYPT

2019 ◽  
Vol XLII-2/W10 ◽  
pp. 1-8 ◽  
Author(s):  
M. Abdelaziz ◽  
M. Elsayed
Keyword(s):  
3D Model ◽  
Low Cost ◽  
Data Gathering ◽  
Archaeological Site ◽  
3D Models ◽  
Surface Model ◽  
Digital Surface Model ◽  
Architectural Elements ◽  
3D Photogrammetry ◽  
First Time

<p><strong>Abstract.</strong> Underwater photogrammetry in archaeology in Egypt is a completely new experience applied for the first time on the submerged archaeological site of the lighthouse of Alexandria situated on the eastern extremity of the ancient island of Pharos at the foot of Qaitbay Fort at a depth of 2 to 9 metres. In 2009/2010, the CEAlex launched a 3D photogrammetry data-gathering programme for the virtual reassembly of broken artefacts. In 2013 and the beginning of 2014, with the support of the Honor Frost Foundation, methods were developed and refined to acquire manual photographic data of the entire underwater site of Qaitbay using a DSLR camera, simple and low cost materials to obtain a digital surface model (DSM) of the submerged site of the lighthouse, and also to create 3D models of the objects themselves, such as statues, bases of statues and architectural elements. In this paper we present the methodology used for underwater data acquisition, data processing and modelling in order to generate a DSM of the submerged site of Alexandria’s ancient lighthouse. Until 2016, only about 7200&amp;thinsp;m<sup>2</sup> of the submerged site, which exceeds more than 13000&amp;thinsp;m<sup>2</sup>, was covered. One of our main objectives in this project is to georeference the site since this would allow for a very precise 3D model and for correcting the orientation of the site as regards the real-world space.</p>

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