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Efficient Encoding And Rendering Of Time Varying Volume Data
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Book Synopsis Efficient Encoding and Rendering of Time-Varying Volume Data by : Institute for Computer Applications in Science and Engineering
Download or read book Efficient Encoding and Rendering of Time-Varying Volume Data written by Institute for Computer Applications in Science and Engineering and published by . This book was released on 1998 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: "Visualization of time-varying volumetric data sets, which may be obtained from numerical simulations or sensing instruments, provides scientists insights into the detailed dynamics of the phenomenon under study. This paper describes a coherent solution based on quantization, coupled with octree and difference encoding for visualizing time-varying volumetric data. Quantization is used to attain voxel-level compression and may have a significant influence on the performance of the subsequent encoding and visualization steps. Octree encoding is used for spatial domain compression, and difference encoding for temporal domain compression. In essence, neighboring voxels may be fused into macro voxels if they have similar values, and subtrees at consecutive time steps may be merged if they are identical. The software rendering process is tailored according to the tree structures and the volume visualization process. With the tree representation, selective rendering may be performed very efficiently. Additionally, the I/O costs are reduced. With these combined savings, a higher level of user interactivity is achieved. We have studied a variety of time-varying volume datasets, performed encoding based on data statistics, and optimized the rendering calculations wherever possible. Preliminary tests on workstations have shown in many cases tremendous reduction by as high as 90% in both storage space and inter-frame delay."
Book Synopsis Visualization Handbook by : Charles D. Hansen
Download or read book Visualization Handbook written by Charles D. Hansen and published by Elsevier. This book was released on 2011-08-30 with total page 1061 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Visualization Handbook provides an overview of the field of visualization by presenting the basic concepts, providing a snapshot of current visualization software systems, and examining research topics that are advancing the field. This text is intended for a broad audience, including not only the visualization expert seeking advanced methods to solve a particular problem, but also the novice looking for general background information on visualization topics. The largest collection of state-of-the-art visualization research yet gathered in a single volume, this book includes articles by a “who’s who of international scientific visualization researchers covering every aspect of the discipline, including:· Virtual environments for visualization· Basic visualization algorithms· Large-scale data visualization· Scalar data isosurface methods· Visualization software and frameworks· Scalar data volume rendering· Perceptual issues in visualization· Various application topics, including information visualization. * Edited by two of the best known people in the world on the subject; chapter authors are authoritative experts in their own fields;* Covers a wide range of topics, in 47 chapters, representing the state-of-the-art of scientific visualization.
Book Synopsis Scalable Interactive Visualization by : Achim Ebert
Download or read book Scalable Interactive Visualization written by Achim Ebert and published by MDPI. This book was released on 2018-05-08 with total page 245 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a printed edition of the Special Issue "Scalable Interactive Visualization" that was published in Informatics
Book Synopsis Data Reduction and Uncertainty Analysis for Volume Visualization by : Nathaniel Richard Fout
Download or read book Data Reduction and Uncertainty Analysis for Volume Visualization written by Nathaniel Richard Fout and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation demonstrates a new approach to hardware-based rendering from compressed volume formats. This method, called deferred filtering, provides efficient decompression when coupled with rendering, allowing interpolation and lighting based on gradients computed on-the-fly, all at interactive frame rates. We then address several other challenges in volumetric compression. First, we consider multidimensional coding of multivariate, time-varying volume data. We present a method that exploits correlations among related variables in order to increase the compression rate as compared to independent compression of variables. We then develop a sophisticated transform coding method that allows decompression in graphics hardware, with the result being a JPEG-like transform coding scheme that allows very large volumes to be compressed and then decompressed in real-time while rendering in graphics hardware. Finally, we describe a lossless floating-point volume compression scheme based on a switched prediction approach that is able to achieve significantly better rates as compared to existing methods with a small increase in compression time. Overall, our work addresses many of the outstanding challenges in data compression that are unique to volume data reduction. Finally, lossy compression adds uncertainty to the volume visualization, and so in order to explore the effects of compression on volume rendering we address the issue of uncertainty in visualization. We use a self-validating computational model to compute a posteriori uncertainty bounds, based on a novel uncertainty framework that captures the various forms of uncertainty present in visualization. We then go on to show that such uncertainty-aware visualizations can produce more complete depictions of the data, thereby allowing more reliable conclusions and informed decisions. This is shown for volume rendering, where we demonstrate that fuzzy volume rendering (volume rendering based on our framework) is capable of generating a reliable volume visualization in which a range of possible renderings is produced, as opposed to a single rendering in which the degree of uncertainty is completely disregarded. Our approach, by computing and communicating the uncertainty in volume rendering, allows viewers a greater degree of confidence in assigning an interpretation to the visualization.
Book Synopsis Research in Progress: Applied and Numerical Mathematics by :
Download or read book Research in Progress: Applied and Numerical Mathematics written by and published by . This book was released on 1998 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Enhancing Salient Features in Volumetric Data Using Illumination and Transfer Functions by : Daniel Jönsson
Download or read book Enhancing Salient Features in Volumetric Data Using Illumination and Transfer Functions written by Daniel Jönsson and published by Linköping University Electronic Press. This book was released on 2016-10-04 with total page 82 pages. Available in PDF, EPUB and Kindle. Book excerpt: The visualization of volume data is a fundamental component in the medical domain. Volume data is used in the clinical work-flow to diagnose patients and is therefore of uttermost importance. The amount of data is rapidly increasing as sensors, such as computed tomography scanners, become capable of measuring more details and gathering more data over time. Unfortunately, the increasing amount of data makes it computationally challenging to interactively apply high quality methods to increase shape and depth perception. Furthermore, methods for exploring volume data has mostly been designed for experts, which prohibits novice users from exploring volume data. This thesis aims to address these challenges by introducing efficient methods for enhancing salient features through high quality illumination as well as methods for intuitive volume data exploration. Humans are interpreting the world around them by observing how light interacts with objects. Shadows enable us to better determine distances while shifts in color enable us to better distinguish objects and identify their shape. These concepts are also applicable to computer generated content. The perception in volume data visualization can therefore be improved by simulating real-world light interaction. This thesis presents efficient methods that are capable of interactively simulating realistic light propagation in volume data. In particular, this work shows how a multi-resolution grid can be used to encode the attenuation of light from all directions using spherical harmonics and thereby enable advanced interactive dynamic light configurations. Two methods are also presented that allow photon mapping calculations to be focused on visually changing areas.The results demonstrate that photon mapping can be used in interactive volume visualization for both static and time-varying volume data. Efficient and intuitive exploration of volume data requires methods that are easy to use and reflect the objects that were measured. A value that has been collected by a sensor commonly represents the material existing within a small neighborhood around a location. Recreating the original materials is difficult since the value represents a mixture of them. This is referred to as the partial-volume problem. A method is presented that derives knowledge from the user in order to reconstruct the original materials in a way which is more in line with what the user would expect. Sharp boundaries are visualized where the certainty is high while uncertain areas are visualized with fuzzy boundaries. The volume exploration process of mapping data values to optical properties through the transfer function has traditionally been complex and performed by expert users. A study at a science center showed that visitors favor the presented dynamic gallery method compared to the most commonly used transfer function editor.
Book Synopsis Visualization and Data Analysis by :
Download or read book Visualization and Data Analysis written by and published by . This book was released on 2006 with total page 416 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Volume Graphics 2001 by : K. Mueller
Download or read book Volume Graphics 2001 written by K. Mueller and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 425 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book contains the proceedings of the International Workshop on Volume Graphics 200 1 (VG'O I) which took place on June 21 and June 22 at Stony Brook, New York. This year's event was the second in the series, following a successful premiere in Swansea, Wales, in March 1999, and was co-sponsored by the IEEE Technical Committee on Visualization and Graphics (TC-VG) as well as EUROGRAPHICS. The Volume Graphics Workshop is held bi-annually and has been created to pro vide a forum for the exploration and advancement of volume-based techniques, beyond the scope of just volume visualization. It brings together researchers and practitioners both from academia and industry, from many parts of the world. Volume graphics is in the process of evolving into a general graphics technology, and the papers included in these proceedings are testimonial to the wide spectrum of unique applications and solu tions that volumetric representations are able to offer.
Book Synopsis Proceedings of the ... IEEE Conference on Visualization by :
Download or read book Proceedings of the ... IEEE Conference on Visualization written by and published by . This book was released on 1990 with total page 620 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Monthly Catalog of United States Government Publications by :
Download or read book Monthly Catalog of United States Government Publications written by and published by . This book was released on 1994 with total page 1016 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book ICASE Semiannual Report written by and published by . This book was released on 1998 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Advances in Information Technology Research and Application: 2012 Edition by :
Download or read book Advances in Information Technology Research and Application: 2012 Edition written by and published by ScholarlyEditions. This book was released on 2012-12-26 with total page 5246 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advances in Information Technology Research and Application / 2012 Edition is a ScholarlyEditions™ eBook that delivers timely, authoritative, and comprehensive information about Information Technology. The editors have built Advances in Information Technology Research and Application / 2012 Edition on the vast information databases of ScholarlyNews.™ You can expect the information about Information Technology in this eBook to be deeper than what you can access anywhere else, as well as consistently reliable, authoritative, informed, and relevant. The content of Advances in Information Technology Research and Application / 2012 Edition has been produced by the world’s leading scientists, engineers, analysts, research institutions, and companies. All of the content is from peer-reviewed sources, and all of it is written, assembled, and edited by the editors at ScholarlyEditions™ and available exclusively from us. You now have a source you can cite with authority, confidence, and credibility. More information is available at http://www.ScholarlyEditions.com/.
Book Synopsis IEEE/ACM SIGGRAPH Symposium on Volume Visualization and Graphics 2002 by :
Download or read book IEEE/ACM SIGGRAPH Symposium on Volume Visualization and Graphics 2002 written by and published by . This book was released on 2002 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proceedings written by and published by . This book was released on 2002 with total page 154 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Mathematical Foundations of Scientific Visualization, Computer Graphics, and Massive Data Exploration by : Torsten Möller
Download or read book Mathematical Foundations of Scientific Visualization, Computer Graphics, and Massive Data Exploration written by Torsten Möller and published by Springer Science & Business Media. This book was released on 2009-06-12 with total page 348 pages. Available in PDF, EPUB and Kindle. Book excerpt: The goal of visualization is the accurate, interactive, and intuitive presentation of data. Complex numerical simulations, high-resolution imaging devices and incre- ingly common environment-embedded sensors are the primary generators of m- sive data sets. Being able to derive scienti?c insight from data increasingly depends on having mathematical and perceptual models to provide the necessary foundation for effective data analysis and comprehension. The peer-reviewed state-of-the-art research papers included in this book focus on continuous data models, such as is common in medical imaging or computational modeling. From the viewpoint of a visualization scientist, we typically collaborate with an application scientist or engineer who needs to visually explore or study an object which is given by a set of sample points, which originally may or may not have been connected by a mesh. At some point, one generally employs low-order piecewise polynomial approximationsof an object, using one or several dependent functions. In order to have an understanding of a higher-dimensional geometrical “object” or function, ef?cient algorithms supporting real-time analysis and manipulation (- tation, zooming) are needed. Often, the data represents 3D or even time-varying 3D phenomena (such as medical data), and the access to different layers (slices) and structures (the underlying topology) comprising such data is needed.
Download or read book AsiaSim 2013 written by Gary Tan and published by Springer. This book was released on 2013-10-29 with total page 621 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book constitutes the refereed proceedings of the 13th International Conference on Systems Simulation, Asia Simulation 2013, held in Singapore, in November 2013. The 45 revised full papers presented together with 18 short papers were carefully reviewed and selected from numerous submissions. The papers address issues such as agent based simulation, scheduling algorithms, simulation methods and tools, simulation and visualization, modeling methodology, simulation in science and engineering, high performance computing and simulation and parallel and distributed simulation.
Book Synopsis NASA Langley Scientific and Technical Information Output: 1998 by :
Download or read book NASA Langley Scientific and Technical Information Output: 1998 written by and published by . This book was released on 1999 with total page 166 pages. Available in PDF, EPUB and Kindle. Book excerpt:
