The paper describes a new spline formulation that supports deformation of polygonal shapes into smooth spline surface models. Once a polygonal shape with underlying rectangular topology is specified by the user, it is deformed into a smooth surface that interpolates all the polygonal vertices. The user can then modify the default smooth surface by increasing or decreasing the amount of deformation, either globally or locally. This is accomplished by interactively controlling the shape parameters associated with the polygonal vertices. This modeling paradigm is conceptually simple, and allows C/sup 2/ continuous surfaces to be easily designed, even by a novice user.
{"title":"A method for deforming polygonal shapes into smooth spline surface models","authors":"Chiew-Lan Tai, K. Loe, B. Barsky, Y. Chan","doi":"10.1109/IV.1999.781574","DOIUrl":"https://doi.org/10.1109/IV.1999.781574","url":null,"abstract":"The paper describes a new spline formulation that supports deformation of polygonal shapes into smooth spline surface models. Once a polygonal shape with underlying rectangular topology is specified by the user, it is deformed into a smooth surface that interpolates all the polygonal vertices. The user can then modify the default smooth surface by increasing or decreasing the amount of deformation, either globally or locally. This is accomplished by interactively controlling the shape parameters associated with the polygonal vertices. This modeling paradigm is conceptually simple, and allows C/sup 2/ continuous surfaces to be easily designed, even by a novice user.","PeriodicalId":340240,"journal":{"name":"1999 IEEE International Conference on Information Visualization (Cat. No. PR00210)","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127059789","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Decomposing a simple polygon into simpler components is one of the basic tasks in computational geometry and its applications. The most important simple polygon decomposition is triangulation. Different techniques for triangulating a simple polygon were designed. The first part of the paper is an overview of triangulation algorithms based on diagonal insertion. In the second part, we present algorithms based on Delaunay triangulation. The basic ideas and approach for each algorithm are presented. Finally, some representative algorithms are compared by efficiency.
{"title":"An overview of triangulation algorithms for simple polygons","authors":"M. Lamot, B. Žalik","doi":"10.1109/IV.1999.781552","DOIUrl":"https://doi.org/10.1109/IV.1999.781552","url":null,"abstract":"Decomposing a simple polygon into simpler components is one of the basic tasks in computational geometry and its applications. The most important simple polygon decomposition is triangulation. Different techniques for triangulating a simple polygon were designed. The first part of the paper is an overview of triangulation algorithms based on diagonal insertion. In the second part, we present algorithms based on Delaunay triangulation. The basic ideas and approach for each algorithm are presented. Finally, some representative algorithms are compared by efficiency.","PeriodicalId":340240,"journal":{"name":"1999 IEEE International Conference on Information Visualization (Cat. No. PR00210)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117114470","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Yuhua Luo, Ricardo Galli, A. C. Almeida, Miguel Dias
The paper presents a prototype system for cooperative architecture design. The system includes a multi-site cooperative 3D editor and a cooperative and communication support platform. By using the prototype system, the users are able to load a design scene, modify its properties and save the result cooperatively. The online basic cooperative, interactive editing functionality on the designed objects via the communication network has been achieved.
{"title":"A prototype system for cooperative architecture design","authors":"Yuhua Luo, Ricardo Galli, A. C. Almeida, Miguel Dias","doi":"10.1109/IV.1999.781615","DOIUrl":"https://doi.org/10.1109/IV.1999.781615","url":null,"abstract":"The paper presents a prototype system for cooperative architecture design. The system includes a multi-site cooperative 3D editor and a cooperative and communication support platform. By using the prototype system, the users are able to load a design scene, modify its properties and save the result cooperatively. The online basic cooperative, interactive editing functionality on the designed objects via the communication network has been achieved.","PeriodicalId":340240,"journal":{"name":"1999 IEEE International Conference on Information Visualization (Cat. No. PR00210)","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125758474","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
E. Sandor, Janine Fron, Kristine Greiber, Fernando Orellana, Stephan Meyers, D. Plepys, Margaret Dolinsky, Mohammed Dastagir Ali
(art)/sup n/ Laboratory and the Electronic Visualization Laboratory (EVL) at the University of Illinois at Chicago have collaborated in the development of the first real time, stereoscopic hardcopy output of virtual reality applications-the ImmersaGram (IGram). The results of this new technology directly address a broad range of information visualization issues along a wide spectrum of disciplines from art, architecture, and science, to medicine, engineering and education.
{"title":"Collaborative visualization: new advances in documenting virtual reality with IGrams","authors":"E. Sandor, Janine Fron, Kristine Greiber, Fernando Orellana, Stephan Meyers, D. Plepys, Margaret Dolinsky, Mohammed Dastagir Ali","doi":"10.1109/IV.1999.781607","DOIUrl":"https://doi.org/10.1109/IV.1999.781607","url":null,"abstract":"(art)/sup n/ Laboratory and the Electronic Visualization Laboratory (EVL) at the University of Illinois at Chicago have collaborated in the development of the first real time, stereoscopic hardcopy output of virtual reality applications-the ImmersaGram (IGram). The results of this new technology directly address a broad range of information visualization issues along a wide spectrum of disciplines from art, architecture, and science, to medicine, engineering and education.","PeriodicalId":340240,"journal":{"name":"1999 IEEE International Conference on Information Visualization (Cat. No. PR00210)","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125673076","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
This paper presents methods for moving image sequence visualization and browsing based on algorithms from computer vision, information visualization and on a hierarchical model for content semantics. We introduce a new method, OM-Images, for the visualization of temporal changes in a moving image sequence. Together with interactive browsing techniques the visualization methods can be used for the exploration of a movie at different levels of abstraction. The proposed levels of abstraction are the physical, image, object or discourse level. The visualization is used to generate (1) static descriptions, which printed on paper yield a "movie book" and (2) interactive documents, e.g. Web pages or special movie browsers. Finally, we give examples of a movie book of a feature length film.
{"title":"Movie maps","authors":"Heimo Müller, Ed Tan","doi":"10.1109/IV.1999.781581","DOIUrl":"https://doi.org/10.1109/IV.1999.781581","url":null,"abstract":"This paper presents methods for moving image sequence visualization and browsing based on algorithms from computer vision, information visualization and on a hierarchical model for content semantics. We introduce a new method, OM-Images, for the visualization of temporal changes in a moving image sequence. Together with interactive browsing techniques the visualization methods can be used for the exploration of a movie at different levels of abstraction. The proposed levels of abstraction are the physical, image, object or discourse level. The visualization is used to generate (1) static descriptions, which printed on paper yield a \"movie book\" and (2) interactive documents, e.g. Web pages or special movie browsers. Finally, we give examples of a movie book of a feature length film.","PeriodicalId":340240,"journal":{"name":"1999 IEEE International Conference on Information Visualization (Cat. No. PR00210)","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126207494","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Within the Visualization project of the Austrian Joint Research Initiative (JRI) Numerical Simulation in Tunnelling (SiTu), the Tunnelling Visualization System (TVS) is being developed, to display information in tunnelling. The aim of the Project is to implement a user friendly visualization system, where the data can be displayed in a way that tunnelling engineers can understand. Virtual reality techniques are new in tunnelling and offer a lot of new possibilities. 3D scalar fields are visualised in a novel way. The data to be visualised are either results from numerical simulation or ones describing geological features. Such data have special properties, which have to be considered by the visualization system. The paper presents innovative techniques for this purpose.
{"title":"Visualization in tunnelling-new developments","authors":"Gernot Opriessnig, G. Beer","doi":"10.1109/IV.1999.781596","DOIUrl":"https://doi.org/10.1109/IV.1999.781596","url":null,"abstract":"Within the Visualization project of the Austrian Joint Research Initiative (JRI) Numerical Simulation in Tunnelling (SiTu), the Tunnelling Visualization System (TVS) is being developed, to display information in tunnelling. The aim of the Project is to implement a user friendly visualization system, where the data can be displayed in a way that tunnelling engineers can understand. Virtual reality techniques are new in tunnelling and offer a lot of new possibilities. 3D scalar fields are visualised in a novel way. The data to be visualised are either results from numerical simulation or ones describing geological features. Such data have special properties, which have to be considered by the visualization system. The paper presents innovative techniques for this purpose.","PeriodicalId":340240,"journal":{"name":"1999 IEEE International Conference on Information Visualization (Cat. No. PR00210)","volume":"70 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133921281","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
It has been previously shown that the visual approach to the analysis of the behaviour of growth patterns can provide a viable solution to the understanding of the physical behaviour of the subject matter. Also, it has been demonstrated that the shape of the profile can be defined in terms of a number of characteristics some of which are general for all profiles and others are specific to individual circumstances. These characteristics, referred to as shape-parameters, are used for the analysis of the profile. Also, they are used for construction of the profile that the phenomenon is likely to assume. The method was validated by applying it to construction project expenditure pattern forecasting and further validation was undertaken by the use of statistical technique, namely, principal component analysis. In this paper, the mathematics of the model is represented whereby, for a given set of shape-parameters, the precise profile is mathematically generated. Due to its complex nature, the problem is decomposed into separate modules each satisfying a number of requirements. The modules operate independently but when combined, the overall boundary requirements are also satisfied.
{"title":"The mathematics of shape-geometry approach to the analysis of curve profile","authors":"F. Khosrowshahi","doi":"10.1109/IV.1999.781536","DOIUrl":"https://doi.org/10.1109/IV.1999.781536","url":null,"abstract":"It has been previously shown that the visual approach to the analysis of the behaviour of growth patterns can provide a viable solution to the understanding of the physical behaviour of the subject matter. Also, it has been demonstrated that the shape of the profile can be defined in terms of a number of characteristics some of which are general for all profiles and others are specific to individual circumstances. These characteristics, referred to as shape-parameters, are used for the analysis of the profile. Also, they are used for construction of the profile that the phenomenon is likely to assume. The method was validated by applying it to construction project expenditure pattern forecasting and further validation was undertaken by the use of statistical technique, namely, principal component analysis. In this paper, the mathematics of the model is represented whereby, for a given set of shape-parameters, the precise profile is mathematically generated. Due to its complex nature, the problem is decomposed into separate modules each satisfying a number of requirements. The modules operate independently but when combined, the overall boundary requirements are also satisfied.","PeriodicalId":340240,"journal":{"name":"1999 IEEE International Conference on Information Visualization (Cat. No. PR00210)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128217320","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The Reorderable Matrix is a simple visualization method for quantitative tabular data. The paper examines how first-time users interact with the Reorderable Matrix and how well they perform a simple task of finding correlating attributes. Visualizing a set of data is a common task in various activities such as decision making or opinion forming. Typical situations are a person making business related decisions, a doctor examining test results of a patient or an engineer making choices between different constructs. All these situations involve examining complex data interactions in a limited time. In this experiment the participants were interacting with the Reorderable Matrix for the first time and tried to find correlating attributes from an unfamiliar set of data.
{"title":"Interaction with the Reorderable Matrix","authors":"H. Siirtola","doi":"10.1109/IV.1999.781570","DOIUrl":"https://doi.org/10.1109/IV.1999.781570","url":null,"abstract":"The Reorderable Matrix is a simple visualization method for quantitative tabular data. The paper examines how first-time users interact with the Reorderable Matrix and how well they perform a simple task of finding correlating attributes. Visualizing a set of data is a common task in various activities such as decision making or opinion forming. Typical situations are a person making business related decisions, a doctor examining test results of a patient or an engineer making choices between different constructs. All these situations involve examining complex data interactions in a limited time. In this experiment the participants were interacting with the Reorderable Matrix for the first time and tried to find correlating attributes from an unfamiliar set of data.","PeriodicalId":340240,"journal":{"name":"1999 IEEE International Conference on Information Visualization (Cat. No. PR00210)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129204429","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The paper appraises the role of Virtual Reality Modelling Language (VRML) based 3D computer based urban and heritage models in assisting professional collaboration on common tasks and engaging the participation of the general public in decision making. The University of the West of England (UWE) have created such models of both a significant area of central Bristol and for the Tower of London. The model and associated information can be interactively viewed through low cost WWW browsers and updated online. The model is held to be a useful analogue for linking available information in more accessible form. Use of an underlying geographic information system (GIS) allows other information to be readily associated with elements within the models. The costs of creation and ownership of traditional and digital models are compared with those of GIS generated models. Developments are discussed to improve and ease collaborative creation and use of such models.
{"title":"Usability of associated GIS and VRML urban models","authors":"N. Bates-Brkljac, J. Counsell","doi":"10.1109/IV.1999.781611","DOIUrl":"https://doi.org/10.1109/IV.1999.781611","url":null,"abstract":"The paper appraises the role of Virtual Reality Modelling Language (VRML) based 3D computer based urban and heritage models in assisting professional collaboration on common tasks and engaging the participation of the general public in decision making. The University of the West of England (UWE) have created such models of both a significant area of central Bristol and for the Tower of London. The model and associated information can be interactively viewed through low cost WWW browsers and updated online. The model is held to be a useful analogue for linking available information in more accessible form. Use of an underlying geographic information system (GIS) allows other information to be readily associated with elements within the models. The costs of creation and ownership of traditional and digital models are compared with those of GIS generated models. Developments are discussed to improve and ease collaborative creation and use of such models.","PeriodicalId":340240,"journal":{"name":"1999 IEEE International Conference on Information Visualization (Cat. No. PR00210)","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131146821","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Octavio Juarez Espinosa, C. Hendrickson, J. Garrett
Visual techniques used to present economic input-output data are described. These techniques were created because the size of the data matrices and the screen limitations complicate data navigation. These techniques allow users to ask questions about detailed and global information. The techniques were designed based on the user tasks. The graphic techniques are combined with direct manipulation techniques to improve the ease and efficiency with which users interact with the system. The software prototype uses 1992 US economic data.
{"title":"Visualization of economic input-output data","authors":"Octavio Juarez Espinosa, C. Hendrickson, J. Garrett","doi":"10.1109/IV.1999.781602","DOIUrl":"https://doi.org/10.1109/IV.1999.781602","url":null,"abstract":"Visual techniques used to present economic input-output data are described. These techniques were created because the size of the data matrices and the screen limitations complicate data navigation. These techniques allow users to ask questions about detailed and global information. The techniques were designed based on the user tasks. The graphic techniques are combined with direct manipulation techniques to improve the ease and efficiency with which users interact with the system. The software prototype uses 1992 US economic data.","PeriodicalId":340240,"journal":{"name":"1999 IEEE International Conference on Information Visualization (Cat. No. PR00210)","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124519198","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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