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CoViCAD:: Comprehensive visualization of coronary artery disease

IEEE TRANSACTIONS ON VISUALIZATION AND computer graphics 2007年第6期13卷 1632-1639页

作者： Termeer, Maurice Bescos, Javier Olivan Breeuwer, Marcel Vilanova, Anna Gerritsen, Frans Groller, M. Eduard Vienna Univ Technol Inst Comp Graph & Algorithms Vienna Austria Philips Med Syst Bothell WA USA Eindhoven Univ Technol NL-5600 MB Eindhoven Netherlands

We present novel, comprehensive visualization techniques for the diagnosis of patients with Coronary Artery Disease using segmented cardiac MRI data. We extent an accepted medical visualization technique called the bull's eye plot by removing discontinuities, preserving the volumetric nature of the left ventricular wall and adding anatomical context. The resulting volumetric bull's eye plot can be used for the assessment of transmurality. We link these visualizations to a 3D view that presents viability information in a detailed anatomical context. We combine multiple MRI scans (whole heart anatomical data, late enhancement data) and multiple segmentations (polygonal heart model, late enhancement contours, coronary artery tree). By selectively combining different rendering techniques we obtain comprehensive yet intuitive visualizations of the various data sources.

关键词： Biomedical MRI Cardiology Data visualisation Image Segmentation Medical Image Processing Co Vi CAD Visualization Coronary Artery Disease Patient Diagnosis Segmented Cardiac MRI Data Medical Visualization Bulls Eye Plot Whole Heart Anatomical Data Late Enhancement Data Polygonal Heart Model Late Enhancement Contours Coronary Artery Tree Coronary Arteriosclerosis Magnetic Resonance imaging Data Visualization Heart Myocardium Arteries Muscles Medical Diagnostic imaging Blood Protocols Cardiac MRI Late Enhancement Viability Bulls Eye Plot

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Improved three-step phase shifting profilometry using digital fringe pattern projection

Improved three-step phase shifting profilometry using digita...

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International conference on computer graphics, imaging and visualisation, CGIV'06

作者： Hu, Yingsong Xi, Jiangtao Chicharo, Joe Yang, Zongkai School of Electrical Computer and Telecommunications Engineering University of Wollongong NSW 2522 Australia Department of Electronic and Information Engineering Huazhong University of Science and Technology Wuhan City 430074 China

ISBN: (纸本)0769526063

In this paper, an improved method for three-step phase shifting profilometry (PSP) is presented to eliminate the errors introduced by the second order harmonic when digital projection are used to generate fringe patterns. Firstly, the error caused by the second order harmonic is theoretically analyzed. Then based on the error analysis and principle of PSP, we propose a novel approach, called improved three-step phase shifting profilometry (I3PSP), to eliminate the influence of the second order harmonic. Finally, simulations are performed to verify the effectiveness of the proposed I3PSP, which demonstrate that the reconstruction accuracy of using three-step PSP has been significantly improved by the proposed I3PSP. © 2006 IEEE.

关键词： Phase shift

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Sustainable Urban developments: Stakeholder engagement through 3D visualisation

Sustainable Urban developments: Stakeholder engagement throu...

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11th IASTED International conference on computer graphics and imaging, CGIM 2010

作者： Isaacs, John Falconer, Ruth Gilmour, Daniel Blackwood, David School of Contemporary Sciences University of Abertay Dundee Dundee DD1 1HG United Kingdom Simbios University of Abertay Dundee Dundee DD1 1HG United Kingdom UWTC University of Abertay Dundee Dundee DD1 1HG United Kingdom

ISBN: (纸本)9780889868243

Rapidly increasing urban populations are placing increased pressure on social, economic and environmental resources. For our cities to cope with this demand we must ensure that any growth is sustainable. Tools already exist which attempt to support sustainable urban decision making. However, as previous work by the authors shows, many of these existing tools fail to either adequately engage all possible stakeholders or represent fully all the complex interactions between the aspects of sustainability. This paper describes the underlying concepts of a prototype simulation and visualisation tool (S-City VT) that will allow all stakeholders, regardless of background or experience, to understand, interact with and influence decisions made on the sustainability of urban design. Using the Dundee Waterfront Development Project as a case study, S-City VT takes the unique approach of combining computer game technology with computer modelling to present the stakeholder with an interactive virtual development. Initial results highlight the viability of virtual representations of proposed real-world structures and also effectiveness of the specific visualisation techniques used in conveying urban sustainability information.

关键词： Sustainable development

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Frequency-domain algorithms for visual analysis on genomic structures in prokaryotes

Frequency-domain algorithms for visual analysis on genomic s...

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International conference on computer graphics, imaging and visualisation, CGIV'06

作者： Cheong, Lee Sing Lin, Feng Seah, Hock Soon Bioinformatics Research Centre Nanyang Technological University Nanyang Avenue Singapore 639798 Singapore School of Computer Engineering Nanyang Technological University Nanyang Avenue Singapore 639798 Singapore

ISBN: (纸本)0769526063

Frequency-domain algorithms are studied to provide the composition of each nucleic acid base simultaneously across numerous frequencies and along the base-positions, through Fourier transformation and color mapping of the bases. And also, composite colored scalograms are constructed by continuous wavelet transformation to provide their individual localized time and periodic energy content in a single figure. The visualization of three-dimensional information in the forms of bases, frequencies and base-positions allows visual analysis of correlated structural and genomic information, which can hardly be obtained from the conventional character string analysis. Significant features of the studied prokaryotic genomes were revealed by the use of the programs developed. © 2006 IEEE.

关键词： Genetic engineering

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Basic transformations on virtual hexagonal structure

Basic transformations on virtual hexagonal structure

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International conference on computer graphics, imaging and visualisation, CGIV'06

作者： He, Xiangjian Jia, Wenjing Wu, Qiang Hur, Namho Hintz, Tom Wang, Huaqing Kim, Jinwoong Department of Computer Systems Faculty of Information Technology University of Technology Sydney Broadcasting System Research Group Digital Broadcasting Research Division Electronics Telecommunications Research Institute 161 Gajeong-dong Yuseong-gu Daejeon 305-700 Korea Republic of

ISBN: (纸本)0769526063

Hexagonal structure is different from the traditional square structure for image representation. The geometrical arrangement of pixels on hexagonal structure can be described in terms of a hexagonal grid. Hexagonal structure provides an easy way for image translation and rotation transformations. However, all the existing hardware for capturing image and for displaying image are produced based on square architecture. It has become a serious problem affecting the advanced research based on hexagonal structure. In this paper, we introduce a new virtual hexagonal structure. Based on this virtual structure, a more flexible and powerful image translation and rotation are performed. The virtual hexagonal structure retains image resolution during the process of image transformations, and does not introduce distortion. Furthermore, images can be smoothly and easily transferred between the traditional square structure and the hexagonal structure. © 2006 IEEE.

关键词： computer graphics

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A technique for visualizing dihedral signal of large protein sequences

A technique for visualizing dihedral signal of large protein...

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International conference on computer graphics, imaging and visualisation, CGIV'06

作者： Nguyen, Quang Vinh Huang, Mao Lin Qian, Yu Zhang, Kang Faculty of Information Technology University of Technology Sydney Australia Department of Computer Science University of Texas at Dallas TX United States

ISBN: (纸本)0769526063

This paper presents a clustering and visualization technique for analyzing dihedral angles of large protein sequences. The clustering is used for discovering and grouping those similar dihedrals while the visualization can display and navigate sequences of dihedral angles of several proteins as well as their clustered property. In order to visualize a very large sequence of hundred thousands of dihedral signals, we plot them on a spiral coordinate system. This spiral visualization ensures the linear distribution without distortion or interruption of a very long sequence of points. A clustering algorithm is also provided to group those dihedral signals into different clusters so that it can enhance the analysis process. Our system can also zoom to display a number of selected proteins interactively. © 2006 IEEE.

关键词： Proteins

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A gesture control framework targeting high-resolution video wall displays 19

A gesture control framework targeting high-resolution video ...

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19th International conference on Information visualisation, IV 2015

作者： Klein, Bernhard Future Cities Laboratory Singapore-ETH Centre 1 Create Way Singapore138602 Singapore

ISBN: (纸本)9781467375689

This recent advances in display and user interface technologies create new opportunities for participatory urban planning. Whereas touch screens enable direct screen interactions for intuitive remodeling of urban simulations, high resolution video walls offer true-to-life or human-scale scenario visualizations. Multi-touch screen environments finally function as an interactive user interface for the entire urban simulation pipeline. However intuitive and preferably natural interactions for simple reconfiguration, overarching tool management or complex tool interaction remain a major challenge. For this reason we have implemented a gesture recognition framework that uses multimodal input devices to satisfy all gesture use cases and integrates a display management system for seamless interaction with our multi-screen infrastructure. To understand the implications of this novel approach, we conducted preliminary user trials with urban planning experts and technicians. The results indicated that the system provides a fluid and natural user experience for exploring and analyzing urban planning data. © 2015 IEEE.

关键词： Human computer interaction

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Screen Space Curvature and Ambient Occlusion 11

Screen Space Curvature and Ambient Occlusion

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11th International Joint conference on computer Vision, imaging and computer graphics Theory and Applications (VISIGRAPP)

作者： Prantl, Martin Vasa, Libor Kolingerova, Ivana Univ West Bohemia Fac Appl Sci Dept Comp Sci & Engn Plzen Czech Republic Univ West Bohemia NTIS Plzen Czech Republic

ISBN: (纸本)9783319648705;9783319648699

Curvature plays an important role in computer graphics. It helps us to better understand surfaces of various objects. We often deal with a discrete geometry. However, the exact curvature can only be evaluated for analytical surfaces and not for discrete ones. Existing algorithms estimate curvature for discrete geometry with a certain precision. Most of the time, the performance of those algorithms is low and they are not intended to be used in real time applications. Our target is to have a real time curvature estimation that can be used during interactive geometry changes, like in a virtual sculpting. This paper proposes a screen space technique which estimates two principal curvatures and their directions at interactive rates. Final curvature can be used for an ambient occlusion estimation. The proposed solution is created to fit directly into existing rendering pipelines.

关键词： Curvature Screen space GPU Ambient occlusion visualisation Discrete differential geometry computer graphics

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An Interactive Method for Visualising Physical Activity in Parks 23

An Interactive Method for Visualising Physical Activity in P...

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23rd International conference in Information Visualization (IV) / 16th International conference computer graphics, imaging and Visualization (CGiV)

作者： Rowe, Benjamin Zhang, Jinglan Washington, Tracy Cuhing, Debra Trost, Stewart Queensland Univ Technol Brisbane Qld Australia QUT Inst Hlth & Biomed Innovat Brisbane Qld Australia

ISBN: (纸本)9781728128504

SOPARC is a widely used method for collecting data about park-based physical activity, however there have been no interactive tools designed for visualising this data. Due to this many researchers using the SOPARC method use tables, bar graphs, or other static methods to visualise the collected data. Many of these methods result in highly obfuscated visualisations [1]-[7]. The aim of this research is to design an interactive tool for visualising SOPARC data that can produce user customised output according to their needs, is easy to use, allows for rapid differentiation of distinct areas, and allows for numerical results to be shown. An interactive visualisation tool has been designed and developed that uses a map-based approach, with colour and numerical overlays. This interactive visualisation tool will provide a new, more transparent way to make sense of SOPARC data that will enhance the decision making process for parks and related policies.

关键词： visualisation Human-computer Interaction SOPARC Physical Activity

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Clusters in hyper-cubic multi-channel satellite imagery

Clusters in hyper-cubic multi-channel satellite imagery

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12th IASTED International conference on computer graphics and imaging, CGIM 2011

作者： Hawick, Kenneth A. Computer Science Institute for Information and Mathematical Sciences Massey University North Shore 102-904 Auckland New Zealand

ISBN: (纸本)9780889868656

Multi-spectral remotely-sensed data such as satellite imagery can yield excellent insights into complex phenomena such as weather systems. Analysing the multi-channel space to separate out different features still presents a challenge, which may increase with the availability of hyperspectral satellites. We use component labelling and population thresholding techniques to separate out clusters in hyper-dimensional channel space and use this information to identify different cloud types in geostationary satellite imagery. Three dimensional visualisation techniques are used to study the hyper-dimensional channel population data.

关键词： Remote sensing

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