Proceedings. Visualization '97 (Cat. No. 97CB36155)最新文献_第4页

Controlled simplification of genus for polygonal models 多边形模型属的控制简化

Proceedings. Visualization '97 (Cat. No. 97CB36155) Pub Date : 1997-10-01 DOI: 10.1109/VISUAL.1997.663909

Jihad El-Sana, A. Varshney

引用次数: 71

The motion map: efficient computation of steady flow animations 运动图:稳定流动画的高效计算

Proceedings. Visualization '97 (Cat. No. 97CB36155) Pub Date : 1997-10-01 DOI: 10.1109/VISUAL.1997.663899

B. Jobard, W. Lefer

引用次数: 58

Vortex identification-applications in aerodynamics: a case study 涡旋识别-在空气动力学中的应用:一个案例研究

Proceedings. Visualization '97 (Cat. No. 97CB36155) Pub Date : 1997-10-01 DOI: 10.1109/VISUAL.1997.663910

D. Kenwright, R. Haimes

引用次数: 55

A comparison of normal estimation schemes 正态估计方案的比较

Proceedings. Visualization '97 (Cat. No. 97CB36155) Pub Date : 1997-10-01 DOI: 10.1109/VISUAL.1997.663848

Torsten Möller, R. Machiraju, K. Mueller, R. Yagel

{"title":"A comparison of normal estimation schemes","authors":"Torsten Möller, R. Machiraju, K. Mueller, R. Yagel","doi":"10.1109/VISUAL.1997.663848","DOIUrl":"https://doi.org/10.1109/VISUAL.1997.663848","url":null,"abstract":"The task of reconstructing the derivative of a discrete function is essential for its shading and rendering as well as being widely used in image processing and analysis. We survey the possible methods for normal estimation in volume rendering and divide them into two classes based on the delivered numerical accuracy. The three members of the first class determine the normal in two steps by employing both interpolation and derivative filters. Among these is a new method which has never been realized. The members of the first class are all equally accurate. The second class has only one member and employs a continuous derivative filter obtained through the analytic derivation of an interpolation filter. We use the new method to analytically compare the accuracy of the first class with that of the second. As a result of our analysis we show that even inexpensive schemes can in fact be more accurate than high order methods. We describe the theoretical computational cost of applying the schemes in a volume rendering application and provide guidelines for helping one choose a scheme for estimating derivatives. In particular we find that the new method can be very inexpensive and can compete with the normal estimations which pre-shade and pre-classify the volume (M. Levoy, 1988).","PeriodicalId":225083,"journal":{"name":"Proceedings. Visualization '97 (Cat. No. 97CB36155)","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131270527","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: 109

Displaying data in multidimensional relevance space with 2D visualization maps 使用二维可视化地图在多维相关空间中显示数据

Proceedings. Visualization '97 (Cat. No. 97CB36155) Pub Date : 1997-10-01 DOI: 10.1109/VISUAL.1997.663868

Jackie Assa, D. Cohen-Or, T. Milo

{"title":"Displaying data in multidimensional relevance space with 2D visualization maps","authors":"Jackie Assa, D. Cohen-Or, T. Milo","doi":"10.1109/VISUAL.1997.663868","DOIUrl":"https://doi.org/10.1109/VISUAL.1997.663868","url":null,"abstract":"The paper introduces a tool for visualizing a multidimensional relevance space. Abstractly, the information to be displayed consists of a large number of objects, a set of features that are likely to be of interest to the user, and some function that measures the relevance level of every object to the various features. The goal is to provide the user with a concise and comprehensible visualization of that information. For the type of applications concentrated on, the exact relevance measures of the objects are not significant. This enables accuracy to be traded for a clearer display. The idea is to \"flatten\" the multidimensionality of the feature space into a 2D \"relevance map\", capturing the inter-relations among the features, without causing too many ambiguous interpretations of the results. To better reflect the nature of the data and to resolve the ambiguity the authors refine the given set of features and introduce the notion of composed features. The layout of the map is then obtained by grading it according to a set of rules and using a simulated annealing algorithm which optimizes the layout with respect to these rules. The technique proposed has been implemented and tested, in the context of visualizing the result of a Web search, in the RMAP (Relevance Map) prototype system.","PeriodicalId":225083,"journal":{"name":"Proceedings. Visualization '97 (Cat. No. 97CB36155)","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133594392","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: 33

Volume rendering of abdominal aortic aneurysms 腹主动脉瘤的体积绘制

Proceedings. Visualization '97 (Cat. No. 97CB36155) Pub Date : 1997-10-01 DOI: 10.1109/VISUAL.1997.663855

R. Tam, C. Healey, B. Flak, P. Cahoon

{"title":"Volume rendering of abdominal aortic aneurysms","authors":"R. Tam, C. Healey, B. Flak, P. Cahoon","doi":"10.1109/VISUAL.1997.663855","DOIUrl":"https://doi.org/10.1109/VISUAL.1997.663855","url":null,"abstract":"One well known application area of volume rendering is the reconstruction and visualization of output from medical scanners like computed tomography (CT). 2D greyscale slices produced by these scanners can be reconstructed and displayed onscreen as a 3D model. Volume visualization of medical images must address two important issues. First, it is difficult to segment medical scans into individual materials based only on intensity values. Second, although greyscale images are the normal method for displaying medical volumes, these types of images are not necessarily appropriate for highlighting regions of interest within the volume. Studies of the human visual system have shown that individual intensity values are difficult to detect in a greyscale image. In these situations colour is a more effective visual feature. We addressed both problems during the visualization of CT scans of abdominal aortic aneurysms. We have developed a classification method that empirically segments regions of interest in each of the 2D slices. We use a perceptual colour selection technique to identify each region of interest in both the 2D slices and the 3D reconstructed volumes. The result is a colourized volume that the radiologists are using to rapidly and accurately identify the locations and spatial interactions of different materials from their scans. Our technique is being used in an experimental post operative environment to help to evaluate the results of surgery designed to prevent the rupture of the aneurysm. In the future, we hope to use the technique during the planning of placement of support grafts prior to the actual operation.","PeriodicalId":225083,"journal":{"name":"Proceedings. Visualization '97 (Cat. No. 97CB36155)","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125888455","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: 13

Virtualized reality: constructing time-varying virtual worlds from real world events 虚拟现实:从现实世界的事件构建时变的虚拟世界

Proceedings. Visualization '97 (Cat. No. 97CB36155) Pub Date : 1997-10-01 DOI: 10.1109/VISUAL.1997.663893

P. Rander, P J Narayanan, T. Kanade

{"title":"Virtualized reality: constructing time-varying virtual worlds from real world events","authors":"P. Rander, P J Narayanan, T. Kanade","doi":"10.1109/VISUAL.1997.663893","DOIUrl":"https://doi.org/10.1109/VISUAL.1997.663893","url":null,"abstract":"Virtualized reality is a modeling technique that constructs full 3D virtual representations of dynamic events from multiple video streams. Image-based stereo is used to compute a range image corresponding to each intensity image in each video stream. Each range and intensity image pair encodes the scene structure and appearance of the scene visible to the camera at that moment, and is therefore called a visible surface model (VSM). A single time instant of the dynamic event can be modeled as a collection of VSMs from different viewpoints, and the full event can be modeled as a sequence of static scenes-the 3D equivalent of video. Alternatively, the collection of VSMs at a single time can be fused into a global 3D surface model, thus creating a traditional virtual representation out of real world events. Global modeling has the added benefit of eliminating the need to hand-edit the range images to correct errors made in stereo, a drawback of previous techniques. Like image-based rendering models, these virtual representations can be used to synthesize nearly any view of the virtualized event. For this reason, the paper includes a detailed comparison of existing view synthesis techniques with the authors' own approach. In the virtualized representations, however, scene structure is explicitly represented and therefore easily manipulated, for example by adding virtual objects to (or removing virtualized objects from) the model without interfering with real event. Virtualized reality, then, is a platform not only for image-based rendering but also for 3D scene manipulation.","PeriodicalId":225083,"journal":{"name":"Proceedings. Visualization '97 (Cat. No. 97CB36155)","volume":"22 17-18","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120931522","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: 105

The contour spectrum 轮廓谱

Proceedings. Visualization '97 (Cat. No. 97CB36155) Pub Date : 1997-10-01 DOI: 10.1145/259081.259279

C. Bajaj, Valerio Pascucci, D. Schikore

引用次数: 431

Building and traversing a surface at variable resolution 以可变分辨率构建和遍历一个表面

Proceedings. Visualization '97 (Cat. No. 97CB36155) Pub Date : 1997-10-01 DOI: 10.1109/VISUAL.1997.663865

L. Floriani, P. Magillo, E. Puppo

引用次数: 133

Information Exploration Shootout Project And Benchmark Data Sets: Evaluating How Visualization Does In Analyzing Real-World Data Analysis Problems 信息探索射击项目和基准数据集:评估可视化在分析现实世界数据分析问题中的作用

Proceedings. Visualization '97 (Cat. No. 97CB36155) Pub Date : 1997-10-01 DOI: 10.1109/VISUAL.1997.663933

G. Grinstein, S. Laskowski, G. Wills, B. Rogowitz

引用次数: 18