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Um ambiente de multiprojeção totalmente imersivo baseado em aglomerados de computadores. ; A complete immersive multiprojection environment based in computer clusters.

Soares, Luciano Pereira
Fonte: Biblioteca Digitais de Teses e Dissertações da USP Publicador: Biblioteca Digitais de Teses e Dissertações da USP
Tipo: Tese de Doutorado Formato: application/pdf
Publicado em 24/06/2005 Português
Relevância na Pesquisa
17.267029%
Nas últimas décadas a tecnologia de realidade virtual tem sido cada vez mais utilizada em várias aplicações na sociedade. Particularmente a partir do início da década de 90, observamos o advento da realidade virtual baseada em multiprojeções, com o surgimento do paradigma de construção de sistemas de realidade virtual totalmente imersivos como por exemplo o CAVE™. Esta tese tem por objetivo apresentar pesquisas e desenvolvimentos relacionados com a implementação do primeiro sistema de multiprojeção totalmente imersivo baseado em aglomerado de computadores convencionais, sistema este denominado de CAVERNA Digital. O trabalho aqui apresentado é composto por um panorama atual do estado da arte das tecnologias de realidade virtual baseadas em multiprojeção. O conceito de aglomerados de computadores convencionais para realidade virtual, ou especificamente VRCluster é apresentado, bem como uma taxonomia de organização interna dos VRClusters. O sistema de multiprojeção da CAVERNA Digital é apresentado, descrevendo em detalhe as opções dos inúmeros subsistemas como projetores, telas, subsistema de vídeo, dispositivos de interação e outros. Outra contribuição desta tese é pela inovação de uma plataforma de visualização interativa voltada para ambientes de realidade virtual imersivos...

Cave chamber data modeling and 3D Web visualization

Silvestre, Ivo; Rodrigues, J. I.; Figueiredo, Mauro; Veiga-Pires, C.
Fonte: Universidade do Algarve Publicador: Universidade do Algarve
Tipo: Outros
Publicado em //2013 Português
Relevância na Pesquisa
27.26703%
Underground caves and its specific structures are important for geomorphological studies. In this paper we present tools to identify and map speleothems by surveying cave chambers interiors. The cave chamber was surveyed using Terrestrial Laser Scanning to acquire point clouds with high level of detail for 3D model generation. This data with 45 million points is useful for either reconstruction, geomorphological studies or virtual visits of caves. With this point cloud we generated a 3D-mesh to represent the surface model of the cave chamber, which is important to study its geomorphological features. A topological structure of the 3D-mesh was also implemented to get an efficient algorithm to help identifying stalactites. The possibility to publish 3D data on the Web is of particular interest for the geospatial field. For this reason, it was decided to make the cave model available in the Web by developing a 3D graphical interface where users can navigate and interact with the three-dimensional models of the cave. For this Web3D framework it was used X3D, WebGL and X3DOM. Such solution does not require any additional plug-ins or components.

Framework for 3D data modeling and Web visualization of underground caves using open source tools

Silvestre, Ivo; Veiga-Pires, C.; Rodrigues, J. I.; Figueiredo, Mauro
Fonte: ACM Publicador: ACM
Tipo: Conferência ou Objeto de Conferência
Publicado em /06/2013 Português
Relevância na Pesquisa
27.26703%
Terrestrial Laser Scanning is a very useful technique for cave studies. This surveying method creates point clouds with high detail levels for 3D model generation, which is indeed useful for either reconstruction, geomorphological studies or virtual visits of caves. The present work generated a 3D model of a cave chamber and developed a framework for 3D data visualization on the Web. Identifying geomorphological structures is one of the goals of this project. The generated 3D-mesh represents the surface model of the cave chamber, which is important to study its geomorphological features. A topological structure of the 3D-mesh was implemented to get an efficient algorithm to help determining stalactites. The recognition and positioning of cave stalactites can provide information on hidden cave features responsible for cave geomorphology. The possibility to publish 3D data on the Web is of particular interest for the geospatial field. For this reason, it was decided to make the cave model available in the Web by developing a 3D graphical interface where users can navigate and interact with the threedimensional models of the cave. For this Web framework, X3D, WebGL and X3DOM were used. Such solution does not require any additional plug-ins or components.

A topological framework for interactive queries on 3D models in the web

Figueiredo, Mauro; Rodrigues, J. I.; Silvestre, Ivo; Veiga-Pires, C.
Fonte: Hindawi publishing corporation Publicador: Hindawi publishing corporation
Tipo: Artigo de Revista Científica
Publicado em //2014 Português
Relevância na Pesquisa
17.267029%
Several technologies exist to create 3D content for the web. With X3D, WebGL, and X3DOM, it is possible to visualize and interact with 3D models in a web browser. Frequently, three-dimensional objects are stored using the X3D file format for the web. However, there is no explicit topological information, which makes it difficult to design fast algorithms for applications that require adjacency and incidence data. This paper presents a new open source toolkit TopTri (Topological model for Triangle meshes) for Web3D servers that builds the topological model for triangular meshes of manifold or nonmanifold models. Web3D client applications using this toolkit make queries to the web server to get adjacent and incidence information of vertices, edges, and faces. This paper shows the application of the topological information to get minimal local points and iso-lines in a 3D mesh in a web browser. As an application, we present also the interactive identification of stalactites in a cave chamber in a 3D web browser. Several tests show that even for large triangular meshes with millions of triangles, the adjacency and incidence information is returned in real time making the presented toolkit appropriate for interactive Web3D applications.

A Topological Framework for Interactive Queries on 3D Models in the Web

Figueiredo, Mauro; Rodrigues, José I.; Silvestre, Ivo; Veiga-Pires, Cristina
Fonte: Hindawi Publishing Corporation Publicador: Hindawi Publishing Corporation
Tipo: Artigo de Revista Científica
Português
Relevância na Pesquisa
17.267029%
Several technologies exist to create 3D content for the web. With X3D, WebGL, and X3DOM, it is possible to visualize and interact with 3D models in a web browser. Frequently, three-dimensional objects are stored using the X3D file format for the web. However, there is no explicit topological information, which makes it difficult to design fast algorithms for applications that require adjacency and incidence data. This paper presents a new open source toolkit TopTri (Topological model for Triangle meshes) for Web3D servers that builds the topological model for triangular meshes of manifold or nonmanifold models. Web3D client applications using this toolkit make queries to the web server to get adjacent and incidence information of vertices, edges, and faces. This paper shows the application of the topological information to get minimal local points and iso-lines in a 3D mesh in a web browser. As an application, we present also the interactive identification of stalactites in a cave chamber in a 3D web browser. Several tests show that even for large triangular meshes with millions of triangles, the adjacency and incidence information is returned in real time making the presented toolkit appropriate for interactive Web3D applications.

Dep??sitos fosf??ticos marinhos na costa sudeste e sul do Brasil: potenciais ??reas de ocorr??ncia identificadas com dados de retroespalhamento ac??stico de fundo e sedimentol??gicos analisados sobre mapa batim??trico 3D

Pinho, Marcelo Peres de; Madureira, Lauro Saint Pastous; Calliari, Lauro J??lio; Griep, Gilberto Henrique; Cooke, Caroline Vieira
Fonte: Universidade Federal do Rio Grande Publicador: Universidade Federal do Rio Grande
Tipo: Artigo de Revista Científica
Português
Relevância na Pesquisa
17.267029%
Bathymetric, sedimentological and seabed acoustic backscatter data were integrated into a 3D GIS (Geographic Information System). 38 kHz echo sounders were used to collect data over 14,596 nautical miles during six fish biomass assessment cruises over the continental shelf, slope and adjacent oceanic regions between Chu????-RS (34???S) and Cape S??ao Tom??e-RJ (22???S), Brazil. The bathymetric set of data were complemented with satellite altimetry and also with data from general bathymetric charts in order to build a bathymetric grid with 5,397,090 points. From this grid, a 3D virtual representation of the seabed was generated, using the language for description of three-dimensional interactive environments X3D. Bottom features such as Rio Grande Cone and Terrace, S??ao Paulo Plateau and others, were identified in the bathymetric maps. 3D GIS implementation allowed to analyze backscatter and sedimentological information over the bathymetric grid, demonstrating to be a useful tool to highlight areas with characteristically phosphatic deposits. 3D GIS proved to be more valuable than two-dimensional representations because allowed observation of details and interpretation of information from different not static viewpoints.; Dados batim??tricos...

Dep??sitos fosf??ticos marinhos na costa sudeste e sul do Brasil: potenciais ??reas de ocorr??ncia identificadas com dados de retroespalhamento ac??stico do fundo e sedimentol??gicos analisados sobre mapa batim??trico 3D

Pinho, Marcelo Peres de; Madureira, Lauro Saint Pastous; Calliari, Lauro J??lio; Griep, Gilberto Henrique; Cooke, Caroline Vieira
Fonte: Universidade Federal do Rio Grande Publicador: Universidade Federal do Rio Grande
Tipo: Artigo de Revista Científica
Português
Relevância na Pesquisa
17.267029%
Bathymetric, sedimentological and seabed acoustic backscatter data were integrated into a 3D GIS (Geographic Information System). 38 kHz echo sounders were used to collect data over 14,596 nautical miles during six fish biomass assessment cruises over the continental shelf, slope and adjacent oceanic regions between Chu??-RS (34???S) and Cape S??o Tom??-RJ (22???S), Brazil. The bathymetric set of data were complemented with satellite altimetry and also with data from general bathymetric charts in order to build a bathymetric grid with 5,397,090 points. From this grid, a 3D virtual representation of the seabed was generated, using the language for description of three-dimensional interactive environments X3D. Bottom features such as Rio Grande Cone and Terrace, S??o Paulo Plateau and others, were identified in the bathymetric maps. 3D GIS implementation allowed to analyze backscatter and sedimentological information over the bathymetric grid, demonstrating to be a useful tool to highlight areas with characteristically phosphatic deposits. 3D GIS proved to be more valuable than two-dimensional representations because allowed observation of details and interpretation of information from different not static viewpoints.; Dados batim??tricos...

Three dimensional image synthesis: theory and application

Adams, Charles N.
Fonte: Monterey, California. Naval Postgraduate School Publicador: Monterey, California. Naval Postgraduate School
Tipo: Thesis; Thesis
Português
Relevância na Pesquisa
17.267029%
Approved for public release; distribution is unlimited.; Approved for public release; distribution is unlimited.; Inverse Synthetic Aperture Radar (ISAR) provides full range detection and classification of sea and air based targets through two-dimensional range-Doppler imaging. The Naval Postgraduate School has developed a custom integrated circuit that can simulate false ISAR images in order to fool enemy ISAR platforms. To validate specific hardware choices within this design, this thesis explores the effect on image quality of an overflow occurring within the final 16-bit summation adder of this circuit. Three solutions to the problem of overflows are presented and analyzed. The logical extension of ISAR development, that of three-dimensional target imaging, is next presented through the discussion of 3D monopulse radar, 3D interferometric ISAR, and a 3D, three receiver ISAR. The relative strengths of each approach are compared, along with both MATLAB and X3D software models created for one specific 3D ISAR implementation. Through the superposition of 2D ISAR images it is shown how 3D ISAR images may be created. Moreover, emphasis is placed on using this knowledge to both enhance current 2D ISAR techniques and to modify the false-target chip to handle 3D ISAR return signals. The thesis concludes with a study of Non-Uniform Rational B-Splines...

Extending DoD modeling and simulation with Web 2.0, Ajax and X3D

Farias, Michael A.
Fonte: Monterey, California. Naval Postgraduate School Publicador: Monterey, California. Naval Postgraduate School
Tipo: Tese de Doutorado
Português
Relevância na Pesquisa
27.26703%
DoD has much to gain from Web 2.0 and the Ajax paradigm in open source. The Java language has come a long way in providing real world case studies and scalable solutions for the enterprise that are currently in production on sites such as eBay.com (http://www.ebay.com) and MLB.com (http://www.mlb.com). The most popular Ajax application in production is Google Maps (http://maps.google.com), which serves as a good example of the power of the technology. Open Source technology has matured greatly in the past three years and is now mature enough for deployment within DoD systems. In the past, management within the DoD has been reluctant to consider Enterprise Level Open Source Technologies as a solution, fearing that they might receive little to no support. In fact, the Open Source Business Model is entirely based on first developing a broad user base then providing support as a service for their clients. DoD Modeling and Simulation can create dynamic and compelling content that is ready for the challenges of the 21st century and completely integrated with the Global Information Grid (GIG) concept. This paper presents a short history of Model View Controller (MVC) architectures and goes over various pros and cons of each framework (Struts...

Extensible 3D (X3D) graphics for visualizing marine mammal reaction to underwater sound on the Southern California ASW Range (SOAR)

Thompson, Stephanie
Fonte: Monterey, California. Naval Postgraduate School Publicador: Monterey, California. Naval Postgraduate School
Tipo: Tese de Doutorado
Português
Relevância na Pesquisa
27.26703%
U.S. Navy use of sonar is essential for national defense, but its potential impacts on marine mammals are not well understood. Predictive models have been developed, but the need still exists for modeling actual marine mammal reaction during Navy exercises. The goal of this thesis is to develop a tool that can assimilate data collected from on-range exercises for visualizing and quantifying marine mammal reactions to underwater sound. In this thesis, X3D Graphics is used to model an acoustic source, as well as visualize acoustic and GPS tracking data collected during exercises. Generating geo-referenced, time synchronized 3D scenes of an August 2006 test, marine mammal positions and tracks of two research boats are displayed over realistic bathymetry. From a separate August 2004 experiment, acoustic transmissions and tracking of a training target are modeled. These demonstrate the essential components needed for visualization of marine mammal reactions during an ASW exercise. Potential future work includes utilizing this system to model multiple SOAR exercises, which will provide baseline data analyses to better understand marine mammal vulnerabilities and improve Navy mitigation procedures.

Network application server using Extensible Mark-up Language (XML) to support distributed databases and 3D environments

Williams, Clifton James
Fonte: Monterey, California. Naval Postgraduate School Publicador: Monterey, California. Naval Postgraduate School
Tipo: Tese de Doutorado
Português
Relevância na Pesquisa
17.267029%
This thesis contributes to the US Navy forces maintaining information superiority in a Network Centric Warfare environment. This research develops an Extensible Markup Language XML-based Web Publishing Framework, which supports the Web Enabled Navy (WEN) architecture infrastructure. The Web application framework easily supports connections to multiple distributed databases and XML-based presentations, specifically three-dimensional (3D) simulations utilizing Extensible 3D (X3D) and Virtual Reality Modeling Language (VRML). This research evaluates and demonstrates the functionality of an XML-based Web Publishing Framework. The research demonstrates ability to connect to both XML and non-XML heterogeneous database systems and provides a framework for the distribution data across heterogeneous systems. The system supports usage in multi-tier network architecture. 3D modeling and simulations provide insights into operations that cannot be realized using standard two-dimensional (2D) renditions. The development of an application server to support 3D modeling and simulations for operational planning will provide the U.S. Navy a better way of realizing operational limits. This research addresses the Web publishing framework, which supports the development XML based data exchange...

Modeling airport ground operations using Discrete Event Simulation (DES) and X3D visualization

Ouerghi, Nabil
Fonte: Monterey, California. Naval Postgraduate School Publicador: Monterey, California. Naval Postgraduate School
Tipo: Tese de Doutorado
Português
Relevância na Pesquisa
27.26703%
Approved for public release, distribution unlimited; Almost all flight simulators are centered on the problems that can occur during flight, whereas airport ground traffic problems are seldom addressed and are growing considerably. A number of precautions have been directed by the U.S. Federal Aviation Administration (FAA) to overcome these challenges, such as pilot training and adding taxiway indicator signals to help pilots follow specific paths when taxiing. Further work is needed. This thesis simulates the problem of Ground Traffic incursions. Discrete Event Simulation (DES) and the Viskit tool are used to build two scenarios describing the takeoff and the landing maneuvers including potential ground incidents. It also presents the different techniques used to build 3D graphics models for the airplanes and the airport environment using Extensible 3D (X3D) graphics. After running the simulation a number of times with different parameters, collected data support basic analysis and potential conclusions. This approach demonstrates a proof-of-concept capability worthy of future work.

Networked humanoid animation driven by human voice using extensible 3D (X3D), H-Anim and JAVA speech open standards

Apaydin, Ozan
Fonte: Monterey, California. Naval Postgraduate School Publicador: Monterey, California. Naval Postgraduate School
Tipo: Tese de Doutorado
Português
Relevância na Pesquisa
27.26703%
Approved for public release, distribution is unlimited; Speech-recognition technology is beginning to be used in automobiles, telephones, personal digital assistants (PDAs), medical records, e-commerce, text dictation and editing. Speech recognition can also be integrated into Virtual Environments (VEs) to create responsive virtual entities. Like the mouse, keyboard, and the trackball, Speech-recognition technology can enhance the control of a computer and improve communication. Dramatically expanding interest in the Internet and VEs has been gated by limited interactivity with human-avatar models. As more users begin interacting with avatars in VEs, designers are prompted to create more realistic, humanlike avatars. This quest for realism needs to go beyond visual aspects to include speechrecognition technology, which can greatly augment the realism of these avatars. This thesis presents design and development of a Voice User Interface (VUI), which maps to a set of behavioral motions for humanoid avatars using Extensible 3D (X3D) graphics, the Virtual Reality Modeling Language (VRML), Humanoid Animation (H-Anim) Standard and Java Speech API. The VUI includes a suitable speech-recognition component for application-command vocabularies. This thesis also demonstrates interchangeability of both avatars and animation behaviors...

3D visualization of tactical communications for planning and operations using Virtual Reality Modeling Language (VRML) and Extensible 3D (X3D).

Hunsberger, Michael G.
Fonte: Escola de Pós-Graduação Naval Publicador: Escola de Pós-Graduação Naval
Tipo: Tese de Doutorado
Português
Relevância na Pesquisa
27.26703%
The military is increasingly reliant on communication networks for day-to-day tasks as well as large-scale military operations. Tactical communications networks are growing progressively more complex as the amount of information required on the battlefield increases. Communication planners require more advanced tools to perform and manage signal-planning activities. This work examines the use of 3D visualizations to assist in tactical signal planning. These visualizations are developed using Virtual Reality Modeling Language (VRML), Extensible 3D (X3D) graphics, and Distributed Information Simulation (DIS) for network connectivity. These visualizations and the connectivity provide signal planners the ability to generate 3D scenarios quickly identifying problems such as frequency interference, connectivity problems, and marginal-coverage areas. Network connectivity also provides a collaborative planning environment for geographically dispersed units. The NATO Global Hub Land C2 Information Exchange Data Model (LC2IEDM) is a semantic model designed for information passing between systems. This work also examines LC2IEDM for its ability to represent tactical communication plans and facilitate the autogeneration of 3D scenarios.

Integrating realistic human group behaviors into a networked 3D virtual environment

Miller, Thomas Erik
Fonte: Monterey, California. Naval Postgraduate School Publicador: Monterey, California. Naval Postgraduate School
Tipo: Tese de Doutorado
Português
Relevância na Pesquisa
17.267029%
Approved for public release, distribution unlimited; No PDF currently available; Virtual humans operating inside large-scale virtual environments (VE) are typically controlled as single entities. Coordination of group activity and movement is usually the responsibility of their real world human controllers. Georeferencing coordinate systems, single-precision versus double-precision number representation and network delay requirements make group operations difficult. Mounting multiple humans inside shared or single vehicles, (i.e. air-assault operations, mechanized infantry operations, or small boat/riverine operations) with high fidelity is often impossible. The approach taken in this thesis is to reengineer the DIS-Java-VRML Capture the Flag game geolocated at Fort Irwin, California to allow the inclusion of human entities. Human operators are given the capability of aggregating or mounting nonhuman entities for coordinated actions. Additionally, rapid content creation of human entities is addressed through the development of a native tag set for the Humanoid Animation (H-Anim) 1.1 Specification in Extensible 3D (X3D). Conventions are demonstrated for integrating the DIS-Java-VRML and H-Anim draft standards using either VRML97 or X3D encodings. The result of this work is an interface to aggregate and control articulated humans using an existing model with a standardized motion library in a networked virtual environment. Virtual human avatars can be mounted and unmounted from aggregation entities. Simple demonstration examples show coordinated tactical maneuver among multiple humans with and without vehicles. Live 3D visualization of animated humanoids on realistic terrain is then portrayed inside freely available web browsers.

Enhancing X3DOM Declarative 3D with Rigid Body Physics Support

Stamoulias, Andreas; Malamos, Athanasios G.; Zampoglou, Markos; Brutzman, Don
Fonte: Escola de Pós-Graduação Naval Publicador: Escola de Pós-Graduação Naval
Tipo: Artigo de Revista Científica
Português
Relevância na Pesquisa
27.59089%
Given that physics can be fundamental for realistic and interactive Web3D applications, a number of JavaScript versions of physics engines have been introduced during the past years. This paper presents the implementation of the rigid body physics component, as defined by the X3D specification, in the X3DOM environment, and the creation of dynamic 3D interactive worlds. We briefly review the state of the art in current technologies forWeb3D graphics, including HTML5, WebGL and X3D, and then explore the significance of physics engines in building realistic Web3D worlds. We include a comprehensive review of JavaScript physics engine libraries, and proceed to summarize the significance of our implementation while presenting in detail the methodology followed. The results obtained so far from our cross-browser experiments demonstrate that real-time interactive scenes with hundreds of rigid bodies can be constructed and operate with acceptable frame rates, while the allowing the user to maintain the scene control.; The research of this paper is granted by the European Union and the Hellenic General Secretary of Research and Technology under the COOPERATION 2009 / 09SYN-72-956 Framework.

X3D Graphics for Web Authors, Getting Started with X3D

Brutzman, Don
Fonte: Escola de Pós-Graduação Naval Publicador: Escola de Pós-Graduação Naval
Tipo: Conferência ou Objeto de Conferência
Português
Relevância na Pesquisa
17.267029%

NPS AUV workbench: collaborative environment for autonomous underwater vehicles (AUV) mission planning and 3D visualization

Lee, Chin Siong
Fonte: Monterey, California. Naval Postgraduate School Publicador: Monterey, California. Naval Postgraduate School
Tipo: Tese de Doutorado Formato: xx, 197 p. : ill. (some col.)
Português
Relevância na Pesquisa
27.26703%
Approved for public release, distribution is unlimited; alities. The extensible Markup Language (XML) is used for data storage and message exchange, Extensible 3D (X3D) Graphics for visualization and XML Schema-based Binary Compression (XSBC) for data compression. The AUV Workbench provides an intuitive cross-platform-capable tool with extensibility to provide for future enhancements such as agent-based control, asynchronous reporting and communication, loss-free message compression and built-in support for mission data archiving. This thesis also investigates the Jabber instant messaging protocol, showing its suitability for text and file messaging in a tactical environment. Exemplars show that the XML backbone of this open-source technology can be leveraged to enable both human and agent messaging with improvements over current systems. Integrated Jabber instant messaging support makes the NPS AUV Workbench the first custom application supporting XML Tactical Chat (XTC). Results demonstrate that the AUV Workbench provides a capable testbed for diverse AUV technologies, assisting in the development of traditional single-vehicle operations and agent-based multiple-vehicle methodologies. The flexible design of the Workbench further encourages integration of new extensions to serve operational needs. Exemplars demonstrate how in-mission and post-mission event monitoring by human operators can be achieved via simple web page...

Analyzing anti-terrorist tactical effectiveness of picket boats for force protection of Navy ships using X3D graphics and agent-based simulation

Harney, James William
Fonte: Monterey, California. Naval Postgraduate School Publicador: Monterey, California. Naval Postgraduate School
Tipo: Tese de Doutorado Formato: xxii, 228 p. : ill. (chiefly col.) ;
Português
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27.26703%
Approved for public release, distribution unlimited; S) technologies to demonstrate a prototypical planning tool that can be used by today's deployed warfighter. All research and work is conducted in a web-based, 'user-centric' fashion utilizing a combination of user-driven and agentbased control of entities for simulation iterations, along with various open source technologies which include Extensible 3D Graphics (X3D), Scalable Vector Graphics (SVG), and Extensible Markup Language (XML). Conventions are demonstrated for the integration of the many academic disciplines utilized during this research to achieve automatic generation of tactically significant scenarios. In order to give the end-user the greatest insight towards potential drawbacks in the tactical planning against surface-borne terrorist threats, various 2D and 3D media provide both real-time and non-real time scenario playback. The result of this work is a fully integrated, prototypical, Java-based application that demonstrates how various Open-Source, web-based technologies can be applied in order to provide the tactical operator with tools to aid in Force Protection planning. Scenarios can be auto generated, viewed, analyzed, and manipulated by end users with little to no computer experience necessary beyond requirements for operation of a desktop personal computer (PC) in the Information Technology for the 21st Century (IT-21) environment at sea. This approach has broad applicability to improve the tactical awareness and defensive posture of ships defending against terrorist attacks in port.; Lieutenant...

3D visualization of an invariant display strategy for hyperspecteral imagery; Three-dimensional visualization of an invariant display strategy for hyperspecteral imagery

Kim, Kang Suk
Fonte: Monterey, California. Naval Postgraduate School Publicador: Monterey, California. Naval Postgraduate School
Tipo: Tese de Doutorado Formato: xvi, 88 p. : ill. (some col.)
Português
Relevância na Pesquisa
27.59089%
Approved for public release, distribution is unlimited; Spectral Imagery provides multi-dimensional data, which are difficult to display in standard three-color image formats. Tyo, et al. (2001) propose an invariant display strategy to address this problem. This approach is to mimic the dynamics of human perception. The dimensionality of the data are reduced by using a Principal Component (PC) transformation, and then displayed by making used of a Hue, Saturation, and Value (HSV) display transform. This study addresses the PC transformation strategy , looks for a global eigenvector via 3D visualization of HSV color space information, and examines the suggested algorithm to provide the most intuitive display. The user interface created in this thesis is capable of computing the necessary implementation of the proposed strategy, viewing selected Region of Interest (ROI) in HSV color space model in 3D, and viewing the 2D resultant image. A demonstration application uses Java language including Java2D, Xj3D Player, Document Object Model (DOM) Application Program Interfaces (API), and Extensible 3D Language (X3D). The Java2D API enables the user to load imagery, process data, and render results in a two-dimensional (2D) view. Xj3D and DOM APIs are introduced to visualize Tyo's invariant display strategy in three-dimensional (3D) views and then to save results as X3D scenes. These techniques appear to be inherently valuable and can serve as the basis for further research. Through this thesis...