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IEEE Visualization, 2002. VIS 2002.最新文献

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Volume deformation for tensor visualization 张量可视化的体积变形
IEEE Visualization, 2002. VIS 2002. Pub Date : 2002-10-27 DOI: 10.1109/VISUAL.2002.1183798
Xiaoqiang Zheng, A. Pang
{"title":"Volume deformation for tensor visualization","authors":"Xiaoqiang Zheng, A. Pang","doi":"10.1109/VISUAL.2002.1183798","DOIUrl":"https://doi.org/10.1109/VISUAL.2002.1183798","url":null,"abstract":"Visualizing second-order 3D tensor fields continue to be a challenging task. Although there are several algorithms that have been presented, no single algorithm by itself is sufficient for the analysis because of the complex nature of tensor fields. In this paper, we present two new methods, based on volume deformation, to show the effects of the tensor field upon its underlying media. We focus on providing a continuous representation of the nature of the tensor fields. Each of these visualization algorithms is good at displaying some particular properties of the tensor field.","PeriodicalId":196064,"journal":{"name":"IEEE Visualization, 2002. VIS 2002.","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-10-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122535357","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}
引用次数: 37
A case study on multiresolution visualization of local rainfall from weather radar measurements 基于气象雷达测量的局部降雨多分辨率可视化实例研究
IEEE Visualization, 2002. VIS 2002. Pub Date : 2002-10-27 DOI: 10.1109/VISUAL.2002.1183823
T. Gerstner, D. Meetschen, S. Crewell, M. Griebel, C. Simmer
{"title":"A case study on multiresolution visualization of local rainfall from weather radar measurements","authors":"T. Gerstner, D. Meetschen, S. Crewell, M. Griebel, C. Simmer","doi":"10.1109/VISUAL.2002.1183823","DOIUrl":"https://doi.org/10.1109/VISUAL.2002.1183823","url":null,"abstract":"Weather radars can measure the backscatter from rain drops in the atmosphere. A complete radar scan provides three-dimensional precipitation information. For the understanding of the underlying atmospheric processes interactive visualization of these data sets is necessary. This is a challenging task due to the size, structure and required context of the data. In this case study, a multiresolution approach for real-time simultaneous visualization of radar measurements together with the corresponding terrain data is illustrated.","PeriodicalId":196064,"journal":{"name":"IEEE Visualization, 2002. VIS 2002.","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-10-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114807701","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}
引用次数: 15
Bounded-distortion piecewise mesh parameterization 有界畸变分段网格参数化
IEEE Visualization, 2002. VIS 2002. Pub Date : 2002-10-27 DOI: 10.1109/VISUAL.2002.1183795
O. Sorkine-Hornung, D. Cohen-Or, Rony Goldenthal, Dani Lischinski
{"title":"Bounded-distortion piecewise mesh parameterization","authors":"O. Sorkine-Hornung, D. Cohen-Or, Rony Goldenthal, Dani Lischinski","doi":"10.1109/VISUAL.2002.1183795","DOIUrl":"https://doi.org/10.1109/VISUAL.2002.1183795","url":null,"abstract":"Many computer graphics operations, such as texture mapping, 3D painting, remeshing, mesh compression, and digital geometry processing, require finding a low-distortion parameterization for irregular connectivity triangulations of arbitrary genus 2-manifolds. This paper presents a simple and fast method for computing parameterizations with strictly bounded distortion. The new method operates by flattening the mesh onto a region of the 2D plane. To comply with the distortion bound, the mesh is automatically cut and partitioned on-the-fly. The method guarantees avoiding global and local self-intersections, while attempting to minimize the total length of the introduced seams. To our knowledge, this is the first method to compute the mesh partitioning and the parameterization simultaneously and entirely automatically, while providing guaranteed distortion bounds. Our results on a variety of objects demonstrate that the method is fast enough to work with large complex irregular meshes in interactive applications.","PeriodicalId":196064,"journal":{"name":"IEEE Visualization, 2002. VIS 2002.","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-10-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129082750","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}
引用次数: 237
Case study: A virtual environment for genomic data visualization 案例研究:基因组数据可视化的虚拟环境
IEEE Visualization, 2002. VIS 2002. Pub Date : 2002-10-27 DOI: 10.1109/VISUAL.2002.1183818
R. M. Adams, Blaze Stancampiano, Michael McKenna, David Small
{"title":"Case study: A virtual environment for genomic data visualization","authors":"R. M. Adams, Blaze Stancampiano, Michael McKenna, David Small","doi":"10.1109/VISUAL.2002.1183818","DOIUrl":"https://doi.org/10.1109/VISUAL.2002.1183818","url":null,"abstract":"With the completion of the human genome sequence, and with the proliferation of genome-related annotation data, the need for scalable and more intuitive means for analysis becomes critical, At Variagenics and Small Design Firm, we have addressed this problem with a coherent three-dimensional space in which all data can be seen in a single context. This tool aids in integrating information at vastly divergent scales while maintaining accurate spatial and size relationships. Our visualization was successful in communicating to project teams with diverse backgrounds the magnitude and biological implication of genetic variation.","PeriodicalId":196064,"journal":{"name":"IEEE Visualization, 2002. VIS 2002.","volume":"256 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-10-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115786538","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}
引用次数: 12
Case study: Visualizing ocean flow vertical motions using Lagrangian-Eulerian time surfaces 案例研究:利用拉格朗日-欧拉时间曲面可视化海流垂直运动
IEEE Visualization, 2002. VIS 2002. Pub Date : 2002-10-27 DOI: 10.1109/VISUAL.2002.1183822
J. Grant, G. Erlebacher, J. F. O'Brien
{"title":"Case study: Visualizing ocean flow vertical motions using Lagrangian-Eulerian time surfaces","authors":"J. Grant, G. Erlebacher, J. F. O'Brien","doi":"10.1109/VISUAL.2002.1183822","DOIUrl":"https://doi.org/10.1109/VISUAL.2002.1183822","url":null,"abstract":"Ocean model simulations commonly assume the ocean is hydrostatic, resulting in near zero vertical motion. The vertical motion found is typically associated with the variations of the thermocline depth over time, which are mainly a result of the development and movement of ocean fronts, eddies, and internal waves. A new technique, extended from Lagrangian-Eulerian Advection, is presented to help understand the variation of vertical motion associated with the change in thermocline depth over time. A time surface is correctly deformed in a single direction according to the flow. The evolution of the time surface is computed via a mixture of Eulerian and Lagrangian techniques. The dominant horizontal motion is textured onto the surface using texture advection, while both the horizontal and vertical motions are used to displace the surface. The resulting surface is shaded for enhanced contrast. Timings indicate that the overhead over standard 2D texture advection is no more than 12%.","PeriodicalId":196064,"journal":{"name":"IEEE Visualization, 2002. VIS 2002.","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-10-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127738324","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}
引用次数: 14
Sea of images 图像的海洋
IEEE Visualization, 2002. VIS 2002. Pub Date : 2002-10-27 DOI: 10.1109/MCG.2003.1242379
Daniel G. Aliaga, Thomas A. Funkhouser, Dimah Yanovsky, I. Carlbom
{"title":"Sea of images","authors":"Daniel G. Aliaga, Thomas A. Funkhouser, Dimah Yanovsky, I. Carlbom","doi":"10.1109/MCG.2003.1242379","DOIUrl":"https://doi.org/10.1109/MCG.2003.1242379","url":null,"abstract":"A long-standing research problem in computer graphics is to reproduce the visual experience of walking through a large photorealistic environment interactively. On one hand, traditional geometry-based rendering systems fall short of simulating the visual realism of a complex environment. On the other hand, image-based rendering systems have to date been unable to capture and store a sampled representation of a large environment with complex lighting and visibility effects. In this paper, we present a \"sea of images,\" a practical approach to dense sampling, storage, and reconstruction of the plenoptic function in large, complex indoor environments. We use a motorized cart to capture omnidirectional images every few inches on a eye-height plane throughout an environment. The captured images are compressed and stored in a multiresolution hierarchy suitable for real-time prefetching during an interactive walkthrough. Later, novel images are reconstructed for a simulated observer by resampling nearby captured images. Our system acquires 15,254 images over 1,050 square feet at an average image spacing of 1.5 inches. The average capture and processing time is 7 hours. We demonstrate realistic walkthroughs of real-world environments reproducing specular reflections and occlusion effects while rendering 15-25 frames per second.","PeriodicalId":196064,"journal":{"name":"IEEE Visualization, 2002. VIS 2002.","volume":"172 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-10-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132760307","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}
引用次数: 11
Exploring scalar fields using critical isovalues 使用临界等值探索标量场
IEEE Visualization, 2002. VIS 2002. Pub Date : 2002-10-27 DOI: 10.1109/VISUAL.2002.1183772
G. Weber, G. Scheuermann, H. Hagen, B. Hamann
{"title":"Exploring scalar fields using critical isovalues","authors":"G. Weber, G. Scheuermann, H. Hagen, B. Hamann","doi":"10.1109/VISUAL.2002.1183772","DOIUrl":"https://doi.org/10.1109/VISUAL.2002.1183772","url":null,"abstract":"Isosurfaces are commonly used to visualize scalar fields. Critical isovalues indicate isosurface topology changes: the creation of new surface components, merging of surface components or the formation of holes in a surface component. Therefore, they highlight interesting isosurface behavior and are helpful in exploration of large trivariate data sets. We present a method that detects critical isovalues in a scalar field defined by piecewise trilinear interpolation over a rectilinear grid and describe how to use them when examining volume data. We further review varieties of the marching cubes (MC) algorithm, with the intention of preserving topology of the trilinear interpolant when extracting an isosurface. We combine and extend two approaches in such a way that it is possible to extract meaningful isosurfaces even when a critical value is chosen as the isovalue.","PeriodicalId":196064,"journal":{"name":"IEEE Visualization, 2002. VIS 2002.","volume":"2012 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-10-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130295628","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}
引用次数: 63
Oriented tensor reconstruction: tracing neural pathways from diffusion tensor MRI 定向张量重建:从扩散张量MRI追踪神经通路
IEEE Visualization, 2002. VIS 2002. Pub Date : 2002-10-27 DOI: 10.1109/VISUAL.2002.1183799
L. Zhukov, A. Barr
{"title":"Oriented tensor reconstruction: tracing neural pathways from diffusion tensor MRI","authors":"L. Zhukov, A. Barr","doi":"10.1109/VISUAL.2002.1183799","DOIUrl":"https://doi.org/10.1109/VISUAL.2002.1183799","url":null,"abstract":"In this paper we develop a new technique for tracing anatomical fibers from 3D tensor fields. The technique extracts salient tensor features using a local regularization technique that allows the algorithm to cross noisy regions and bridge gaps in the data. We applied the method to human brain DT-MRI data and recovered identifiable anatomical structures that correspond to the white matter brain-fiber pathways. The images in this paper are derived from a dataset having 121/spl times/88/spl times/60 resolution. We were able to recover fibers with less than the voxel size resolution by applying the regularization technique, i.e., using a priori assumptions about fiber smoothness. The regularization procedure is done through a moving least squares filter directly incorporated in the tracing algorithm.","PeriodicalId":196064,"journal":{"name":"IEEE Visualization, 2002. VIS 2002.","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-10-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131477152","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}
引用次数: 128
Case study: Visual debugging of finite element codes 案例研究:有限元代码的可视化调试
IEEE Visualization, 2002. VIS 2002. Pub Date : 2002-10-27 DOI: 10.1109/VISUAL.2002.1183819
Patricia J. Crossno, D. Rogers, C. Garasi
{"title":"Case study: Visual debugging of finite element codes","authors":"Patricia J. Crossno, D. Rogers, C. Garasi","doi":"10.1109/VISUAL.2002.1183819","DOIUrl":"https://doi.org/10.1109/VISUAL.2002.1183819","url":null,"abstract":"We present an innovative application developed at Sandia National Laboratories for visual debugging of unstructured finite element physics codes. Our tool automatically locates anomalous regions, such as inverted elements or nodes whose variable values lie outside a prescribed range, then extracts mesh subsets around these features for detailed examination. The subsets are viewed using color coding of variable values superimposed on the mesh structure. This allows the values and their relative spatial locations within the mesh to be correlated at a glance. Both topological irregularities and hot spots within the data stand out visually, allowing the user to explore the exact numeric values of the grid at surrounding points over time. We demonstrate the utility of this approach by debugging a cell inversion in a simulation of an exploding wire.","PeriodicalId":196064,"journal":{"name":"IEEE Visualization, 2002. VIS 2002.","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-10-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128518984","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}
引用次数: 6
Case study: Visualization and analysis of high Rayleigh number - 3D convection in the Earth's mantle 案例研究:高瑞利数-地幔三维对流的可视化与分析
IEEE Visualization, 2002. VIS 2002. Pub Date : 2002-10-27 DOI: 10.1109/VISUAL.2002.1183813
G. Erlebacher, D. Yuen, F. Dubuffet
{"title":"Case study: Visualization and analysis of high Rayleigh number - 3D convection in the Earth's mantle","authors":"G. Erlebacher, D. Yuen, F. Dubuffet","doi":"10.1109/VISUAL.2002.1183813","DOIUrl":"https://doi.org/10.1109/VISUAL.2002.1183813","url":null,"abstract":"Data sets from large-scale simulations (up to 501/sup 3/ grid points) of mantle convection are analyzed with volume rendering of the temperature field and a new critical point analysis of the velocity field. As the Rayleigh number Ra is increased the thermal field develops increasingly thin plume-like structures along which heat is convected. These eventually break down and become turbulent. Visualization methods are used to distinguish between various models of heat conductivity and to develop an intuitive understanding of the structure of the flow.","PeriodicalId":196064,"journal":{"name":"IEEE Visualization, 2002. VIS 2002.","volume":"94 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-10-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124744429","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}
引用次数: 10
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