Welcome
Digital library of construction informatics
and information technology in civil engineering and construction
 

Works 

Search Results

Facilitated by the SciX project

Hits 1 to 7 of 7

Charles Woodward, Jani Lahti, Jukka Rönkkö, Petri Honkamaa, Mika Hakkarainen, Jani Jäppinen, Kari Rainio, Sanni Siltanen, Jouko Hyväkkä

Case digitalo – a range of virtual and augmented reality solutions in construction application

Abstract: We describe a range of Virtual and Augmented Reality (VR/AR) solutions applied during the planning and construction of VTT’s new head offices, the Digitalo (“Digital House”) in Espoo, Finland. During the building phase as well as in later evaluations 2003-2006, the various approaches used for Digitalo’s visualisation included: radiosity rendering by still images; immersive virtual reality visualisation; mobile outdoors augmenting; augmented scale model; augmented web camera; 3D landscapes; and interior design by means of virtual and augmented reality. We employed various display devices ranging from HMD video glasses to CAVE screens, and from PDA’s to varying kinds of PC solutions. Some of our solutions, for example the augmented web camera and scale model systems, have not been previously presented and they appear here for the first time. Also, we describe the current status of the applied methods, as well as directions for future research. Altogether, we believe this case study to be among the most comprehensive ones in the world to include such a wide variety VR/AR techniques applied in a single building project.

Keywords: virtual reality, augmented reality, CAVE, HMD, web cameras, mobile computing, feature detection, markers, tracking, tangible user interfaces

DOI:

Full text: content.pdf (3,170,308 bytes) (available to registered users only)

Series: w78:2007 (browse)
Cluster:
Class:
Similar papers:
Sound: N/A.


Côté S,Trudel P,Desbiens M-A,Giguère M,Snyder R

Live mobile panoramic high accuracy augmented reality for engineering and construction

Abstract: Augmented reality finds many potential uses in the infrastructure world. However, the work done by architects and engineers has potential impacts on people’s lives. Therefore, the data they base their decisions upon must be accurate and reliable. Unfortunately, so far augmented reality has failed to provide the level of accuracy and robustness that would be required for engineering and construction work using a portable setup. Recent work has shown that panorama based augmentation can provide a level of accuracy that is higher than standard video-based augmentation methods, because of its wider field of view. In this paper, we present a live mobile augmentation method based on panoramic video. The environment is captured live using a high resolution panoramic video camera installed on top of a tripod, and positioned in the area to be augmented. The system is first initialized by the user, who aligns the 3D model of the environment with the panoramic stream. The live scene is then augmented with a 3D CAD model, the augmenting elements being properly occluded by live moving objects in the scene. To augment the scene from a different vantage point, the user grabs the tripod and carries it to the new location. During that time, the system calculates the camera position by tracking optical features identified on the panoramic video stream. When the user places the tripod back on the ground, the system automatically resumes augmentation from the new position. The system was tested in indoor and outdoor conditions. Results demonstrate high tracking accuracy, jitter free augmentation, and that the setup is sufficiently portable to be used on site.

Keywords: Live augmented reality,accuracy,panorama,video,construction,3D model

DOI:

Full text: content.pdf (2,368,406 bytes) (available to registered users only)

Series: convr:2013 (browse)
Cluster:
Class:
Similar papers:
Sound: N/A.


J. Beetz & B. de Vries

Building Product Catalogues on the Semantic Web

Abstract: In this paper we describe a prototype implementation of an ontology repository that captures the concepts in the Ontology Web Language OWL. We describe how these concepts can be used directly by embedding them in standard HTML pages and thus augmenting traditional product catalogues with semanti-cally rich information by means of RDFa. As an addition to the ISO part 12006-3, where such a mechanism is not specified explicitly, we propose a way to instantiate actual products, their types and attributes through an instance-of relationship. Building upon the rich family of Semantic Web standards such as SPARQL and RDFa, we demonstrate how information in building product catalogues can be made machine-accessible in more efficient and generic ways. Using the Open Source persistency frameworks we demonstrate how real-world products can be linked to 13,000+ concepts with some 44,000 names in different languages in efficient ways.

Keywords:

DOI:

Full text: content.pdf (82,694 bytes) (available to registered users only)

Series: w78:2009 (browse)
Cluster:
Class:
Similar papers:
Sound: N/A.


Muhammad Usman Hassan, Asli Akcamete-Gungor and Cagla Meral

Investigation of Terrestrial Laser Scanning Reflectance Intensity and RGB Distributions to Assist Construction Material Identification

Abstract: Terrestrial Laser Scanning (TLS) allows collection of dense 3D point cloud data that captures a structure's as-is conditions. The geometric information from the collected data could be used to generate a 3D-model of the structure. However, the generated model usually lacks functional information - a basic requirement for a semantically rich information model. Some of the functional information (such as cost, mechanical and thermal performance) could be derived if the material used in a particular geometry is identified. The material related information in the collected data, which is mostly underutilized in the construction industry, could be potentially used for material identification. This paper investigates the possibility of material identification from the TLS data using the obtained scaled reflectance intensity (I_i) from the laser scanner and the Red-Green-Blue (RGB) values from the in-built camera images. For this purpose, structural concrete, light-weight concrete and clay brick samples were scanned under two different conditions: (i) high/low ambient illumination, (ii) dry/wet surface. Obtained results show that scanned materials have different I_i distributions. The illumination conditions have no effect on the obtained I_i distribution; however, the surface moisture conditions vary the measured I_i distributions considerably. Recorded RGB values of the illuminated samples could be used as a secondary parameter for material identification. These results show that TLS has a potential of augmenting the visual material identification processes.

Keywords: Laser Scanning, Point Cloud, Automated Material Identification, Construction Materials

DOI: https://doi.org/10.24928/JC3-2017/0312

Full text: content.pdf (1,986,863 bytes) (available to registered users only)

Series: jc3:2017 (browse)
Cluster:
Class:
Similar papers:
Sound: N/A.


Omar H-S,Jahnkassim P-S,Mahmud M

Pilot tests of augmented realities in science displays and design presentations

Abstract: Augmented Reality (AR) enriches the education environment by adding spatially aligned virtual objects (3D models, 2D textures, textual annotations, etc.) by means of special display technologies .This research was a pilot test within a longer research project aimed at investigating and evaluating the relevance of realism elements in 3d AR education technologies in science centers and design presentations. The main advantages of using virtual objects are that they can be animated, they are interactive and can respond to the user’s actions and are not constrained by the costs and practical or physical limitations of real objects. These factors make AR a powerful educational tool. In this research, AR Planets and AR Dinosaur in National Science Center Malaysia were developed as a testbed. A pilot study - to gauge the public reaction to the technology - was developed involving the augmenting of earth globe and a dinosaur. Researchers found out that both adult and children reactions were enthusiastic, changing a dry subject such as science to an exciting activity. A survey was undertaken to gauge the reactions and significance to aspects of realism in AR. User studies were done using field studies to study the effectiveness of realism in AR application in real scenarios. The participants were asked to evaluate two different approaches of application to experience the Augmented 3d science content with heavy realism content and less realism content. After a couple of minutes exploring the content with recorded video, they filled in the questionnaire which assessed their experience towards the application. The importance to the realism elements recorded with the feedback and attitude by the users such as their satisfaction and feel real to the AR content and the feeling of connection to the content elements .The evaluation found out that 98% of the participants believe the AR content with heavy realism elements is superior to compare with AR content with less realism elements in science center. This research will give a better guidance to education centers on user expectations and responses towards such an application including the importance and significance on using realism in Augmented Reality application.

Keywords: Augmented reality,education,science,design,presentation,science center,planet,dinosaur

DOI:

Full text: content.pdf (1,035,231 bytes) (available to registered users only)

Series: convr:2013 (browse)
Cluster:
Class:
Similar papers:
Sound: N/A.


Ricardo Eiris Pereira, Hashem Izadi Moud and Masoud Gheisari

Using 360-Degree Interactive Panoramas to Develop Virtual Representation of Construction Sites

Abstract: 360-degree panoramic virtual reality is a ubiquitous technique for visualizing complex construction environments that can be augmented with different layers of information. Unlike the common virtual environments that provide unrealistic computer-generated simulation of the environment, panoramic virtual reality is able to create highly realistic and detailed representations of the real environment while giving users a sense of immersion. In this study, interactive panoramas are made of a series of panoramic videos and photos, which are captured from a construction site. Various types of time/location-specific information (e.g., audio, video, virtual 2D, or 3D models) can be augmented in such panoramic virtual environments to create a natural interactive experience. Users will be able to navigate through the panoramic virtual environment of a complex construction project while interacting with augmented information to learn more about the construction project and job site. In this research a 360-degree panoramic virtual reality environment of a construction job site is created. This paper describes the development of interactive panoramic scenes using panoramic photos and videos. The procedure of creating the panoramic experience, the process of augmenting the captured panoramas with different layers of information and an integrated pilot study are described in details.

Keywords: 360-Degree Panorama, Interactive Panoramic Scenes, Virtual Reality, Immersive Virtual Experience, Construction Site Visit

DOI: https://doi.org/10.24928/JC3-2017/0122

Full text: content.pdf (4,756,371 bytes) (available to registered users only)

Series: jc3:2017 (browse)
Cluster:
Class:
Similar papers:
Sound: N/A.


Smith I

Augmenting design integration and communication using idiom

Abstract: This paper discusses how a system developed for spatial composition using cases is able to improve design integration and communication. Layouts are built interactively by users rather than automatically generated as has been proposed by others. The design is incrementally parameterized as cases are added and therefore, case adaptation, user interpretation and model activation can occur at any stage. IDIOM supports designers through reducing constraint complexity and through managing design preferences, thereby restraining proposed solutions and further adaptation during subsequent project stages within globally feasible design spaces. Since this system finds global solutions for constraints in an incremental manner, it is well suited for collaborative design and for increasing the integration of spatial design with other activities. Practical applications, currently under way, are demonstrating the advantages of IDIOM for communication and integration in construction.

Keywords:

DOI:

Full text: content.pdf (131,523 bytes) (available to registered users only)

Series: w78:1996 (browse)
Cluster: papers of the same cluster (result of machine made clusters)
Class: class.communication (0.065641) class.man-software (0.023989) class.social (0.016752)
Similar papers:
Sound: read aloud.

Permission to reproduce these papers has been graciously provided by the University of Ljubljana. The assistance of the editor, Prof. Ziga Turk, is gratefully appreciated.


No more hits.

 

hosted by University of Ljubljana



includes

W78




© itc.scix.net 2003
Home page of this database login Powered by SciX Open Publishing Services 1.002 February 16, 2003