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 Out of the archaeologist's desk drawer: communicating archaeological data online

2015 ◽  
Vol II-5/W3 ◽  
pp. 1-7 ◽  
Author(s):  
D. Abate ◽  
M. David
Keyword(s):  
Archaeological Site ◽  
Field Work ◽  
3D Models ◽  
Scientific Publications ◽  
Archaeological Data ◽  
Scientific Papers ◽  
Ostia Antica ◽  
Dissemination Of Research ◽  
High Level

During archaeological field work a huge amount of data is collected, processed and elaborated for further studies and scientific publications. However, access and communication of linked data; associated tools for interrogation, analysis and sharing are often limited at the first stage of the archaeological research, mainly due to issues related to IPR. Information is often released months if not years after the fieldwork. Nowadays great deal of archaeological data is ‘born digital’ in the field or lab. This means databases, pictures and 3D models of finds and excavation contexts could be available for public communication and sharing. Researchers usually restrict access to their data to a small group of people. It follows that data sharing is not so widespread among archaeologists, and dissemination of research is still mostly based on traditional pre-digital means like scientific papers, journal articles and books. This project has implemented a web approach for sharing and communication purposes, exploiting mainly open source technologies which allow a high level of interactivity. The case study presented is the newly Mithraeum excavated in Ostia Antica archaeological site in the framework of the Ostia Marina Project.

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>

scholarly journals An Integrated Approach to 3D Web Visualization of Cultural Heritage Heterogeneous Datasets

2019 ◽  
Vol 11 (21) ◽  
pp. 2508 ◽  
Author(s):  
Argyro-Maria Boutsi ◽  
Charalabos Ioannidis ◽  
Sofia Soile
Keyword(s):  
Cultural Heritage ◽  
Programming Languages ◽  
Large Scale ◽  
User Interaction ◽  
Holistic Approach ◽  
Integrated Approach ◽  
3D Models ◽  
Data Interoperability ◽  
Web Based ◽  
3D Scene

The evolution of the high-quality 3D archaeological representations from niche products to integrated online media has not yet been completed. Digital archives of the field often lack multimodal data interoperability, user interaction and intelligibility. A web-based cultural heritage archive that compensates for these issues is presented in this paper. The multi-resolution 3D models constitute the core of the visualization on top of which supportive documentation data and multimedia content are spatial and logical connected. Our holistic approach focuses on the dynamic manipulation of the 3D scene through the development of advanced navigation mechanisms and information retrieval tools. Users parse the multi-modal content in a geo-referenced way through interactive annotation systems over cultural points of interest and automatic narrative tours. Multiple 3D and 2D viewpoints are enabled in real-time to support data inspection. The implementation exploits front-end programming languages, 3D graphic libraries and visualization frameworks to handle efficiently the asynchronous operations and preserve the initial assets’ accuracy. The choice of Greece’s Meteora, UNESCO world site, as a case study accounts for the platform’s applicability to complex geometries and large-scale historical environments.

scholarly journals DIGITAL TECHNOLOGIES AND 3D-MODELING OF URBAN PLANNING (THE TOMSK CASE STUDY)

2020 ◽  
Vol 22 (6) ◽  
pp. 70-82
Author(s):  
V. I. Korenev
Keyword(s):  
Urban Planning ◽  
3D Modeling ◽  
Architectural Design ◽  
3D Model ◽  
Digital Technologies ◽  
3D Models ◽  
Architectural Heritage ◽  
Heritage Preservation ◽  
Planning Problems

The paper studies the use of digital technologies and 3D models of cities in solving urban planning problems. The experience in creating the information system for ensuring urban planning and internet sites in Tomsk is demonstrated and the possibilities are shown for their use in graphic-analytic research. The 3D model of the Tomsk-city is proposed to design and explore the flood processes, land use non-observances, architectural design and modeling of the urban environment, and requirements for the architectural heritage preservation.

scholarly journals Eye-tracking Analysis of Interactive 3D Geovisualization

2017 ◽  
Vol 10 (3) ◽  
Author(s):  
Lukas Herman ◽  
Stanislav Popelka ◽  
Vendula Hejlova
Keyword(s):  
Eye Tracking ◽  
Low Cost ◽  
3D Models ◽  
Main Function ◽  
Eye Tracker ◽  
Virtual Camera ◽  
Interactive 3D Models ◽  
Interactive 3D ◽  
3D Scene

This paper describes a new tool for eye-tracking data and their analysis with the use of interactive 3D models. This tool helps to analyse interactive 3D models easier than by time-consuming, frame-by-frame investigation of captured screen recordings with superimposed scanpaths. The main function of this tool, called 3DgazeR, is to calculate 3D coordinates (X, Y, Z coordinates of the 3D scene) for individual points of view. These 3D coordinates can be calculated from the values of the position and orientation of a virtual camera and the 2D coordinates of the gaze upon the screen. The functionality of 3DgazeR is introduced in a case study example using Digital Elevation Models as stimuli. The purpose of the case study was to verify the functionality of the tool and discover the most suitable visualization methods for geographic 3D models. Five selected methods are presented in the results section of the paper. Most of the output was created in a Geographic Information System. 3DgazeR works with generic CSV files, SMI eye-tracker, and the low-cost EyeTribe tracker connected with open source application OGAMA. It can compute 3D coordinates from raw data and fixations.

scholarly journals Layout Construction: A Case Study In Algorithm Engineering

1993 ◽  
Vol 22 (450) ◽  
Author(s):  
Gudmund Skovbjerg Frandsen ◽  
Jens Palsberg ◽  
Erik Meineche Schmidt ◽  
Steen Sjøgaard
Keyword(s):  
Neural Networks ◽  
Combinatorial Optimization ◽  
Heuristic Search ◽  
User Interaction ◽  
Algorithm Engineering ◽  
Aesthetic Appearance ◽  
Automatic Inference ◽  
The Aesthetic ◽  
High Level

<p>We design a system for generating newspaper layout proposals. The input to the system consists of editorial information (text, pictures, etc) and style information (non-editorial information that specifies the aesthetic appearance of a layout). We consider the automation of layout construction to pose two main problems. One problem consists in optimizing the layout with respect to the constraints and preferences specified in the style information. Another problem consists in finding a representation of the style information that both supports its use in the combinatorial optimization and supports its modification through high level user interaction and automatic inference from a database of examples.</p><p> </p><p>We propose a solution that combines <em> heuristic search, randomization </em> and <em> neural networks.</em> We have implemented a first version based on the <var> bisection </var> strategy -- a page is bisected recursively until the number of sub-divisions matches the number of articles to be placed.</p>

scholarly journals 3D SURVEY AND AUGMENTED REALITY FOR CULTURAL HERITAGE. THE CASE STUDY OF AURELIAN WALL AT CASTRA PRAETORIA IN ROME

2016 ◽  
Vol XLI-B5 ◽  
pp. 931-937 ◽  
Author(s):  
M. Canciani ◽  
E. Conigliaro ◽  
M. Del Grasso ◽  
P. Papalini ◽  
M. Saccone
Keyword(s):  
Augmented Reality ◽  
Cultural Heritage ◽  
Coming Out ◽  
3D Model ◽  
Low Cost ◽  
Conservation Status ◽  
3D Models ◽  
Curtain Wall ◽  
Virtual Reconstruction

The development of close-range photogrammetry has produced a lot of new possibility to study cultural heritage. 3D data acquired with conventional and low cost cameras can be used to document, investigate the full appearance, materials and conservation status, to help the restoration process and identify intervention priorities. At the same time, with 3D survey a lot of three-dimensional data are collected and analyzed by researchers, but there are a very few possibility of 3D output. The augmented reality is one of this possible output with a very low cost technology but a very interesting result. Using simple mobile technology (for iPad and Android Tablets) and shareware software (in the case presented “Augment”) it is possible to share and visualize a large number of 3D models with your own device. The case study presented is a part of an architecture graduate thesis, made in Rome at Department of Architecture of Roma Tre University. We have developed a photogrammetric survey to study the Aurelian Wall at Castra Praetoria in Rome. The surveys of 8000 square meters of surface have allowed to identify stratigraphy and construction phases of a complex portion of Aurelian Wall, specially about the Northern door of Castra. During this study, the data coming out of 3D survey (photogrammetric and topographic), are stored and used to create a reverse 3D model, or virtual reconstruction, of the Northern door of Castra. This virtual reconstruction shows the door in the Tiberian period, nowadays it's totally hidden by a curtain wall but, little and significative architectural details allow to know its original feature. The 3D model of the ancient walls has been mapped with the exact type of bricks and mortar, oriented and scaled according to the existing one to use augmented reality. Finally, two kind of application have been developed, one on site, were you can see superimposed the virtual reconstruction on the existing walls using the image recognition. On the other hand, to show the results also during the graduation day, the same application has been created in off-site condition using a poster.

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 THE INTEGRATED SURVEY OF NARROW SPACES AND UNDERGROUND ARCHITECTURE: THE CASE STUDY OF CAMPANA CAVES BAS-RELIEFS

2019 ◽  
Vol XLII-2/W9 ◽  
pp. 277-282
Author(s):  
P. Clini ◽  
R. Nespeca ◽  
R. Angeloni ◽  
R. Mammoli
Keyword(s):  
High Resolution ◽  
3D Model ◽  
Complex Geometry ◽  
Survey Method ◽  
Light Sources ◽  
Digital Reconstruction ◽  
Historical Importance ◽  
Level Of Knowledge ◽  
Important Basis

<p><strong>Abstract.</strong> Italian Cultural Heritage is rich in fascinating Underground Heritage (UH) to be protected and preserved because of its fragility and historical importance. An accurate and high-resolution 3D model is essential to reach an appropriate level of knowledge to safeguard caves but there are several obstacles to face. Underground data acquisition and following elaborations are problematic due to environmental conditions such as lack of homogeneous light sources, highly absorbing and unstable surfaces, narrow spaces and complex geometry. For these reasons, the integration of different techniques is mandatory to achieve a valid final product that could be an important basis for consolidation, preservation and valorization of the UH. In this paper, an integrated survey method is tested for a realistic digital reconstruction of hypogeal spaces. In addition to outputs for experts of conservation, the creation of multimedia products for a wider audience of non-professionals users is investigated as a way to preserve UH from decay. Thanks to VR, visitors virtually walk through the underground galleries observing and interacting, making accessible also fragile environments with forbidden access due to preservation policies.</p>

scholarly journals UAV platforms for cultural heritage survey: first results

2014 ◽  
Vol II-5 ◽  
pp. 227-234 ◽  
Author(s):  
M. Lo Brutto ◽  
A. Garraffa ◽  
P. Meli
Keyword(s):  
Cultural Heritage ◽  
Archaeological Site ◽  
3D Models ◽  
Land Art ◽  
Aerial Photogrammetry ◽  
First Results ◽  
Aerial Vehicle ◽  
Flight Parameters ◽  
High Level ◽  
Different Characteristics

The use of Unmanned Aerial Vehicle (UAV) is becoming very common for photogrammetric survey especially due to numerous advantages compared to "traditional" aerial photogrammetry. The work carried out describes the first results obtained using different UAV systems for Cultural Heritage surveys. The study was performed acquiring two different datasets on an archaeological site and a "land art" site respectively. These datasets have different characteristics in relation to the extension of the surveyed areas, the used platform, the flight parameters. A Computer Vision approach has been used to produce 3D models and ortho-images with a very high level of detail. Some tests were also carried out to evaluate the metric accuracy of the images orientations and 3D models.

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