We will give an overview of the COLLAdA 1,4 standard physics format [1][2][3] and its use in the 3d physics content pipeline. We describe design decisions, implementation, compatibility and interoperability aspects o...
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ISBN:
(纸本)9781595936523
We will give an overview of the COLLAdA 1,4 standard physics format [1][2][3] and its use in the 3d physics content pipeline. We describe design decisions, implementation, compatibility and interoperability aspects of adopters of this industry standard, as well as, its relationsliip with other standards such as X3d, (ISO 19775) from the web3d Consortium. [4]
In this paper we give a comprehensive overview of our work on digital dossiers for the presentation of cultural heritage, in particular contemporary art, on the web using standard3dtechnology. digital dossiers allow...
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ISBN:
(纸本)9781595936523
In this paper we give a comprehensive overview of our work on digital dossiers for the presentation of cultural heritage, in particular contemporary art, on the web using standard3dtechnology. digital dossiers allow for navigation using concept-graphs, and use 3d in an essential manner to present artwork installations, as 3d models, as well as all the relevant information needed for understanding the artwork, and, for curators, for the preservation and possible re-installation of the artwork(s). Our discussion encompasses requirements, implementation issues, andthe realization of guided tours in digital dossiers, that provide a narrative facility as well as tools to experiment with exhibition parameters in virtual space.
this paper describes work to create an open protocol for wide-area multi-user X3d, incorporating many aspects of prior academic, experimental, and proprietary systems, but emphasizing simplicity and practicality for u...
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ISBN:
(纸本)9781595936523
this paper describes work to create an open protocol for wide-area multi-user X3d, incorporating many aspects of prior academic, experimental, and proprietary systems, but emphasizing simplicity and practicality for use among heterogeneous Internet user agents. In the Internet tradition, it is documented as a protocol (rather than a framework), and backed by freely-available reference implementations. the hope is that this protocol is useful to those working on new X3d networking nodes as well as to those building multi-user world systems.
In this paper, the novel 3d survey technique of laser scanning integrated with photogrammetric image is introduced as a quasi-automatic way for the detailed modeling andthe virtual rendering of whole cities with comp...
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ISBN:
(纸本)9781595936523
In this paper, the novel 3d survey technique of laser scanning integrated with photogrammetric image is introduced as a quasi-automatic way for the detailed modeling andthe virtual rendering of whole cities with complex geometries and structures. Afterwards, some specifications and examples are given about the different reachable levels of detail, on the base of our surveys done in the city of Gorizia (Italy). thanks to the laser building volumes andthe photogrammetric image textures a VRML model for Victoria Square has been obtained;such a high level detail 3d model is described in the part of this paper.
Shape inspection options in most of the current online shape repositories provide limited information on the shape of a desired model. In addtion, stored models can be downloaded only at the orginal level of detail (L...
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ISBN:
(纸本)9781595936523
Shape inspection options in most of the current online shape repositories provide limited information on the shape of a desired model. In addtion, stored models can be downloaded only at the orginal level of detail (LOd). In this paper, we present our application that combines remote interactive inspection of a digital shape with realtime simplification. Simplification is parameterised, is performed in real-time andthe results are again available for inspection. We have embeddedthe application in a shape repository whereby, having found a suitable simplication, users can downloadthe model at that LOd.
this paper presents a grid-based large-scale web3d collaborative virtual environment that has the capability of scaling across multiple geographically dispersed resources. the architecture consists of distributed mobi...
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ISBN:
(纸本)9781595936523
this paper presents a grid-based large-scale web3d collaborative virtual environment that has the capability of scaling across multiple geographically dispersed resources. the architecture consists of distributed mobile agents working cooperatively in supporting and managing the web3d collaborative virtual environments. the mobile agents' tasks include managing persistency and consistency of the virtual worlds, maintaining reliability and efficiency of user interactions, ensuring security and automonous and have the ability of migrating among hosts to maximize resource utilizations. Grid technologies allow the mobile agents to execute and communicate securely in multiple administrative domains. Grid-based scheduling components and polices are integrated to provide intelligent resource optimizations. Futhermore, a better load-balancing can be achieved by utilizing additional or more accurate information like data-user proximity and hosts' workload. the result will be a more scalable and robust architecture for supporting large-scale web3d collaborative virtual environment.
the VRML and X3d Standards have achieved success as a method for not only 3d Model Interchange, but also for creation of complex synthesized3d worlds. Shortcomings in VRML and X3d exist in the areas of manipulation o...
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ISBN:
(纸本)9781595936523
the VRML and X3d Standards have achieved success as a method for not only 3d Model Interchange, but also for creation of complex synthesized3d worlds. Shortcomings in VRML and X3d exist in the areas of manipulation of aural soundspaces, and interaction via intuitive devices. Cognitive and Computer Scientists at the Communications Research Centre, Canada, have embarked on a process of exploration to resolve these shortcomings by binding leading edge audio control software to VRML/X3d, thus using de facto standards to extend I/O control and audio data manipulation. this paper will outline the direction of these experiments.
In this paper, we explore anddiscuss X3d as an application description language for advanced mixed reality environments. X3d has been established as an important platform for today's web-based visualization and V...
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ISBN:
(纸本)9781595936523
In this paper, we explore anddiscuss X3d as an application description language for advanced mixed reality environments. X3d has been established as an important platform for today's web-based visualization and VR applications. Yet, there are very few examples for augmented reality systems utilizing X3d beyond a simple geometric description format. In order to fulfill the image compositing and synthesis requests of today's augmented reality applications, we propose extensions t o X3d, especially with a focus on lighting and realistic rending.
this paper describes a 3d environment for representing a university undergraduate education programme. More specifically, the curriculum data selected fro representation, how they are visualized in the 3d environment,...
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ISBN:
(纸本)9781595936523
this paper describes a 3d environment for representing a university undergraduate education programme. More specifically, the curriculum data selected fro representation, how they are visualized in the 3d environment, andthe process of generated it are detailed. Modulus and curricula have been rendered in such a way that many numerical data, such as credits andduration, are translated into a graphical form, resulting in a simple and intuitive overall view. this effective visualization strategy provides added-value in comparison withthe more traditional textual presentation. the 3d environment, based on the X3d language, is dynamically generated from a database thanks to an XSLT transformation. the use of a powerful XML basedweb publishing tool, i.e. Apache Cocoon, allows this transformation to be easily performed "on the fly".
In this paper, a compression method of encoding/decoding 3d mesh based on octree is proposed. Vertices of the 3d mesh are reclassified according to the octree rule. We analyse all the nodes of the octree statistically...
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ISBN:
(纸本)9781595936523
In this paper, a compression method of encoding/decoding 3d mesh based on octree is proposed. Vertices of the 3d mesh are reclassified according to the octree rule. We analyse all the nodes of the octree statistically to identify the type of nodes which accounts for the max proportion and encode them with fewer bits. According to the transmission sequence of geometric information, we rearrange topology and attribute information and encode them. Progressive strategies adopted by the single model andthe scene are different in order to maximize the use of network bandwidth and computational performance of local machines. this method has high compression rate, is adapt to network transmission with short response time at the client and can control the level of detail of the model decoding.
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