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Proceedings Visualization '98 (Cat. No.98CB36276)最新文献

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Size preserving pattern mapping 保持大小模式映射
Proceedings Visualization '98 (Cat. No.98CB36276) Pub Date : 1998-10-18 DOI: 10.1109/VISUAL.1998.745325
Y. Kurzion, Torsten Möller, R. Yagel
{"title":"Size preserving pattern mapping","authors":"Y. Kurzion, Torsten Möller, R. Yagel","doi":"10.1109/VISUAL.1998.745325","DOIUrl":"https://doi.org/10.1109/VISUAL.1998.745325","url":null,"abstract":"We introduce a new approach for mapping texture on volumetric iso-surfaces and parametric surfaces. Our approach maps 2D images on surfaces while maintaining continuity and preserving the size of the mapped images on the models. Our approach is fully automatic. It eliminates the need for manual mapping of texture maps. We use the curvature of a surface at a point in order to continuously vary the scale of the mapped image. This makes our approach dependent only on local attributes of a point (position, normal and its derivatives) and independent of the global shape and topology of an object. Our method can map high resolution images on low resolution volumes, hence enhancing the visual appearance of rendered volume data. We describe a general framework useful for all surface types that have a C/sup 1/ continuous normal. We demonstrate the new method for painting volume data and for mapping cavities on volume data.","PeriodicalId":399113,"journal":{"name":"Proceedings Visualization '98 (Cat. No.98CB36276)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127502585","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: 8
TOPIC ISLANDS/sup TM/-a wavelet-based text visualization system 一个基于小波的文本可视化系统
Proceedings Visualization '98 (Cat. No.98CB36276) Pub Date : 1998-10-18 DOI: 10.5555/288216.288247
N. Miller, Pak Chung Wong, Mary Brewster, Harlan Foote
{"title":"TOPIC ISLANDS/sup TM/-a wavelet-based text visualization system","authors":"N. Miller, Pak Chung Wong, Mary Brewster, Harlan Foote","doi":"10.5555/288216.288247","DOIUrl":"https://doi.org/10.5555/288216.288247","url":null,"abstract":"We present a novel approach to visualize and explore unstructured text. The underlying technology, called TOPIC-O-GRAPHY/sup TM/, applies wavelet transforms to a custom digital signal constructed from words within a document. The resultant multiresolution wavelet energy is used to analyze the characteristics of the narrative flow in the frequency domain, such as theme changes, which is then related to the overall thematic content of the text document using statistical methods. The thematic characteristics of a document can be analyzed at varying degrees of detail, ranging from section-sized text partitions to partitions consisting of a few words. Using this technology, we are developing a visualization system prototype known as TOPIC ISLANDS to browse a document, generate fuzzy document outlines, summarize text by levels of detail and according to user interests, define meaningful subdocuments, query text content, and provide summaries of topic evolution.","PeriodicalId":399113,"journal":{"name":"Proceedings Visualization '98 (Cat. No.98CB36276)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116542228","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: 89
Isosurface extraction in time-varying fields using a temporal hierarchical index tree 利用时间层次索引树在时变字段中提取等值面
Proceedings Visualization '98 (Cat. No.98CB36276) Pub Date : 1998-10-18 DOI: 10.1109/VISUAL.1998.745298
Han-Wei Shen
{"title":"Isosurface extraction in time-varying fields using a temporal hierarchical index tree","authors":"Han-Wei Shen","doi":"10.1109/VISUAL.1998.745298","DOIUrl":"https://doi.org/10.1109/VISUAL.1998.745298","url":null,"abstract":"Many high-performance isosurface extraction algorithms have been proposed in the past several years as a result of intensive research efforts. When applying these algorithms to large-scale time-varying fields, the storage overhead incurred from storing the search index often becomes overwhelming. This paper proposes an algorithm for locating isosurface cells in time-varying fields. We devise a new data structure, called the temporal hierarchical index tree, which utilizes the temporal coherence that exists in a time-varying field and adaptively coalesces the cells' extreme values over time; the resulting extreme values are then used to create the isosurface cell search index. For a typical time-varying scalar data set, not only does this temporal hierarchical index tree require much less storage space, but also the amount of I/O required to access the indices from the disk at different time steps is substantially reduced. We illustrate the utility and speed of our algorithm with data from several large-scale time-varying CFD simulations. Our algorithm can achieve more than 80% of disk-space savings when compared with the existing techniques, while the isosurface extraction time is nearly optimal.","PeriodicalId":399113,"journal":{"name":"Proceedings Visualization '98 (Cat. No.98CB36276)","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122621224","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: 81
Scientific visualization and data modeling of scattered sediment contaminant data in New York/New Jersey estuaries 纽约/新泽西河口分散沉积物污染物数据的科学可视化和数据建模
Proceedings Visualization '98 (Cat. No.98CB36276) Pub Date : 1998-10-18 DOI: 10.1109/VISUAL.1998.745345
H. Ma, Keith W. Jones, E. Stern
{"title":"Scientific visualization and data modeling of scattered sediment contaminant data in New York/New Jersey estuaries","authors":"H. Ma, Keith W. Jones, E. Stern","doi":"10.1109/VISUAL.1998.745345","DOIUrl":"https://doi.org/10.1109/VISUAL.1998.745345","url":null,"abstract":"Sediments in many parts of the New York and New Jersey estuary system are contaminated with toxic organic and inorganic compounds by different sources. Because of the potential environmental consequences, detailed information on the spatial distribution of sediment contaminants is essential in order to carry out routine shipping channel dredging in an environmentally responsible way, and to remediate hot spots cost-effectively and safely. Scientific visualization and scatter data modeling techniques have been successfully applied in analyzing the sparse sampling data of sediment contaminants in New York and New Jersey estuaries, the underlying spatial characteristics of which are otherwise difficult to comprehend. Continuous realizations of contaminant concentrations in the region were obtained by using a spectral domain-decomposition scattered data model and IBM Data Explorer which is a software package for scientific data visualization.","PeriodicalId":399113,"journal":{"name":"Proceedings Visualization '98 (Cat. No.98CB36276)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114603983","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
High quality rendering of attributed volume data 属性体数据的高质量渲染
Proceedings Visualization '98 (Cat. No.98CB36276) Pub Date : 1998-10-18 DOI: 10.1109/VISUAL.1998.745311
U. Tiede, T. Schiemann, K. Höhne
{"title":"High quality rendering of attributed volume data","authors":"U. Tiede, T. Schiemann, K. Höhne","doi":"10.1109/VISUAL.1998.745311","DOIUrl":"https://doi.org/10.1109/VISUAL.1998.745311","url":null,"abstract":"For high quality rendering of objects segmented from tomographic volume data the precise location of the boundaries of adjacent objects in subvoxel resolution is required. We describe a new method that determines the membership of a given sample point to an object by reclassifying the sample point using interpolation of the original intensity values and searching for the best fitting object in the neighbourhood. Using a ray-casting approach we then compute the surface location between successive sample points along the viewing-ray by interpolation or bisection. The accurate calculation of the object boundary enables a much more precise computation of the gray-level-gradient yielding the surface normal. Our new approach significantly improves the quality of reconstructed and shaded surfaces and reduces aliasing artifacts for animations and magnified views. We illustrate the results on different cases including the Visible-Human-Data, where we achieve nearly photo-realistic images.","PeriodicalId":399113,"journal":{"name":"Proceedings Visualization '98 (Cat. No.98CB36276)","volume":"66 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128644462","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: 165
A case study using the virtual environment for reconstructive surgery 应用虚拟环境进行重建手术的案例研究
Proceedings Visualization '98 (Cat. No.98CB36276) Pub Date : 1998-10-18 DOI: 10.1109/VISUAL.1998.745336
K. Montgomery, M. Stephanides, S. Schendel, M. Ross
{"title":"A case study using the virtual environment for reconstructive surgery","authors":"K. Montgomery, M. Stephanides, S. Schendel, M. Ross","doi":"10.1109/VISUAL.1998.745336","DOIUrl":"https://doi.org/10.1109/VISUAL.1998.745336","url":null,"abstract":"The paper details the use of a Virtual Environment for Reconstructive Surgery (VERS) in the case of a 17 year-old boy with a severe facial defect, arising from the removal of a soft tissue tumor. Computed tomography (CT) scans were taken of the patient, the data were segmented, a mesh was generated, and this patient-specific mesh was used in a virtual environment by the surgeons for preoperative visualization of the defect, planning of the surgery, and production of a custom surgical template to aid in repairing the defect. The paper details the case of this patient, provides a background on the virtual environment technology used, discusses the difficulties encountered, and describes the lessons learned.","PeriodicalId":399113,"journal":{"name":"Proceedings Visualization '98 (Cat. No.98CB36276)","volume":"101 6","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"113980885","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: 18
Production visualization for the ASCI One TeraFLOPS machine 生产可视化的ASCI 1万亿次浮点运算的机器
Proceedings Visualization '98 (Cat. No.98CB36276) Pub Date : 1998-10-18 DOI: 10.1109/VISUAL.1998.745343
P. D. Heermann
{"title":"Production visualization for the ASCI One TeraFLOPS machine","authors":"P. D. Heermann","doi":"10.1109/VISUAL.1998.745343","DOIUrl":"https://doi.org/10.1109/VISUAL.1998.745343","url":null,"abstract":"The delivery of the first one tera-operations/sec computer has significantly impacted production data visualization, affecting data transfer, post processing, and rendering. Terascale computing has motivated a need to consider the entire data visualization system; improving a single algorithm is not sufficient. This paper presents a systems approach to decrease by a factor of four the time required to prepare large data sets for visualization. For daily production use, all stages in the processing pipeline from physics simulation code to pixels on a screen, must be balanced to yield good overall performance. Performance of the initial visualization system is compared with recent improvements. \"Lessons learned\" from the coordinated deployment of improved algorithms also are discussed, including the need for 64 bit addressing and a fully parallel data visualization pipeline.","PeriodicalId":399113,"journal":{"name":"Proceedings Visualization '98 (Cat. No.98CB36276)","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121783110","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: 25
Multi-Source Data Analysis Challenges 多源数据分析挑战
Proceedings Visualization '98 (Cat. No.98CB36276) Pub Date : 1998-10-18 DOI: 10.1109/VISUAL.1998.745353
S. Uselton, L. Treinish, J. Ahrens, E. W. Bethel, A. State
{"title":"Multi-Source Data Analysis Challenges","authors":"S. Uselton, L. Treinish, J. Ahrens, E. W. Bethel, A. State","doi":"10.1109/VISUAL.1998.745353","DOIUrl":"https://doi.org/10.1109/VISUAL.1998.745353","url":null,"abstract":"Author(s): Uselton, S; Ahrens, J; Bethel, W; Treinish, L; State, A | Abstract: The factors making multi-source data analysis pervasive in the near future are: ease and cost effectiveness of digital data acquisition; fidelity, detail and practicality of computational simulations; and networks that make data from many sources accessible to a single user or application. Bringing data from multiple sources together is much more powerful than using each source separately, and computer systems can provide support for users in situations where they would be overwhelmed by volume or complexity without the support. However, multi-source data analysis still face challenges in the Accelerated Strategic Computing Initiative, geosciences, atmospheric sciences, medicine, and aerospace engineering design, and these challenges are presented.","PeriodicalId":399113,"journal":{"name":"Proceedings Visualization '98 (Cat. No.98CB36276)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130260828","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: 16
Wavelets over curvilinear grids 曲线网格上的小波
Proceedings Visualization '98 (Cat. No.98CB36276) Pub Date : 1998-10-18 DOI: 10.1109/VISUAL.1998.745318
G. Nielson, Il-Hong Jung, J. Sung
{"title":"Wavelets over curvilinear grids","authors":"G. Nielson, Il-Hong Jung, J. Sung","doi":"10.1109/VISUAL.1998.745318","DOIUrl":"https://doi.org/10.1109/VISUAL.1998.745318","url":null,"abstract":"We develop multiresolution models for analyzing and visualizing two-dimensional flows over curvilinear grids. Our models are based upon nested spaces of piecewise defined functions defined over nested curvilinear grid domains. The nested domains are selected so as to maintain the original geometry of the inner boundary. We first give the refinement and decomposition equations for Haar wavelets over these domains. Next, using lifting techniques we develop and show examples of piecewise linear wavelets over curvilinear grids.","PeriodicalId":399113,"journal":{"name":"Proceedings Visualization '98 (Cat. No.98CB36276)","volume":"65 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127582538","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: 17
Acoustic imaging and visualization of plumes discharging from black smoker vents on the deep seafloor 深海黑烟喷口喷出烟羽的声成像和可视化
Proceedings Visualization '98 (Cat. No.98CB36276) Pub Date : 1998-10-18 DOI: 10.1109/VISUAL.1998.745347
P. Rona, K. Bemis, Deepak R. Kenchammana-Hosekote, D. Silver
{"title":"Acoustic imaging and visualization of plumes discharging from black smoker vents on the deep seafloor","authors":"P. Rona, K. Bemis, Deepak R. Kenchammana-Hosekote, D. Silver","doi":"10.1109/VISUAL.1998.745347","DOIUrl":"https://doi.org/10.1109/VISUAL.1998.745347","url":null,"abstract":"Visualization and quantification methods are being developed to analyze our acoustic images of thermal plumes containing metallic mineral particles that discharge from hot springs on the deep seafloor. The acoustic images record intensity of backscattering from the particulate matter suspended in the plumes. The visualization methods extract, classify, visualize, measure and track reconstructions of the plumes, depicted by isointensity surfaces as 3D volume objects and 2D slices. The parameters measured, including plume volume, cross sectional area, centerline location (trajectory), surface area and isosurfaces at percentages of maximum backscatter intensity, are being used to derive elements of plume behavior including expansion with height, dilution, and mechanisms of entrainment of surrounding seawater. Our aim is to compare the observational data with predictions of plume theory to test and advance models of the behavior of hydrothermal plumes through the use of multiple representations.","PeriodicalId":399113,"journal":{"name":"Proceedings Visualization '98 (Cat. No.98CB36276)","volume":"76 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132907439","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
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