检索结果-内蒙古大学图书馆

Perception-motivated multiresolution rendering on sole-cube maps

MULTIMEDIA TOOLS AND APPLICATIONS 2014年第1期72卷 231-252页

作者： Sheng, Bin Meng, Weiliang Sun, Hanqiu Wu, Wen Wu, Enhua Shanghai Jiao Tong Univ Dept Comp Sci & Eng Shanghai 200030 Peoples R China Chinese Acad Sci Inst Software State Key Lab Comp Sci Beijing Peoples R China Chinese Acad Sci Inst Automat LIAMA NLPR Beijing Peoples R China Chinese Univ Hong Kong Hong Kong Hong Kong Peoples R China Univ Macau Macau Peoples R China Chinese Acad Sci Inst Software Beijing Peoples R China

This paper presents a novel GPU-based multiresolution rendering on sole-cube maps (SCMs), which is a variant of geometry images built upon spherical parameterization. Given spherical parametrization of a manifold mesh, the sphere domain is gnomonically projected to a closed cube, which constitutes the 6-chart sole-cube maps. A quadtree structure of SCMs and normal map atlas are then constructed by using the regular re-sampling. Then, by packing the quadtree nodes into the SCMs texture atlas, a new parallel multiresolution rendering is processed on the latest GPU in two rendering passes: the multiresolution node selection in fragment shader;the triangulation in vertex shader followed by the node culling operation in geometry shader. The proposed approach generates adaptive mesh surfaces dynamically, and can be fully implemented in GPU parallelization. The proposed scheme alleviates the computing load of multiresolution mesh refinement on CPU, and our GPU-based multiresolution rendering is demonstrated with a variety of examples. Our user study confirmed that the visual quality of the SCMs multiresolution rendering, in comparison with the meshes/geometry images rendering, is also highly efficient especially for complex models in large-scale virtual environment.

关键词： multiresolution rendering Sole-cube maps GPU processing Mesh refinement

来源：评论

学校读者我要写书评

暂无评论

MCGIM-Based Model Streaming for Realtime Progressive rendering

引用

Journal of Computer Science & Technology 2011年第1期26卷 166-175页

作者：盛斌孟维亮孙汉秋吴恩华 Department of Computer Science and Engineering the Chinese University of Hong Kong State Key Laboratory of Computer Science Institute of SoftwareChinese Academy of Sciences Faculty of Science and Technology University of Macao

While most mesh streaming techniques focus on optimizing the transmission order of the polygon data, few approaches have addressed the streaming problems by using geometry images （GIM）. In this paper, we present a new approach which firstly partitions a mesh into several surface patches, then converts these patches into multi-chart geometry images （MCGIM）. After resampling the MCGIM and normal map atlas are obtained, we hierarchically construct the regular geometry image representation by adopting the quadtree structure. In this way, the encoded nodes can be transmitted in arbitrary order with high transmission flexibility. Also, the rendering quality of the partially transmitted models can be greatly improved by using the normal texture atlas. Meanwhile only the geometry on the silhouette to the current viewpoint are required to be refined and transmitted, therefore the amount of data is minimized for transferring each frame. In particular, our approach also allows users to encode and transmit the mesh data via JPEG2000 technique. Therefore, our mesh streaming method is suitable for transmitting 3D animation models with use of Motion JPEG2000 videos. Experimental results have demonstrated the effectiveness of our approach, which enables one server to stream the MCGIM texture atlas to the clients. Also, the transmitted model can be rendered in a multiresolution manner by GPU acceleration on the client side, due to the regular geometry structure of MCGIM.

关键词： mesh streaming geometry images JPEG2000 multiresolution rendering

来源：评论

学校读者我要写书评

暂无评论

Interactive Multiscale Tensor Reconstruction for multiresolution Volume Visualization

引用

IEEE TRANSACTIONS ON VISUALIZATION AND COMPUTER GRAPHICS 2011年第12期17卷 2135-2143页

作者： Suter, Susanne K. Guitian, Jose A. Iglesias Marton, Fabio Agus, Marco Elsener, Andreas Zollikofer, Christoph P. E. Gopi, M. Gobbetti, Enrico Pajarola, Renato Univ Zurich CH-8006 Zurich Switzerland Univ Calif Irvine Irvine CA USA

Large scale and structurally complex volume datasets from high-resolution 3D imaging devices or computational simulations pose a number of technical challenges for interactive visual analysis. In this paper, we present the first integration of a multiscale volume representation based on tensor approximation within a GPU-accelerated out-of-core multiresolution rendering framework. Specific contributions include (a) a hierarchical brick-tensor decomposition approach for pre-processing large volume data, (b) a GPU accelerated tensor reconstruction implementation exploiting CUDA capabilities, and (c) an effective tensor-specific quantization strategy for reducing data transfer bandwidth and out-of-core memory footprint. Our multiscale representation allows for the extraction, analysis and display of structural features at variable spatial scales, while adaptive level-of-detail rendering methods make it possible to interactively explore large datasets within a constrained memory footprint. The quality and performance of our prototype system is evaluated on large structurally complex datasets, including gigabyte-sized micro-tomographic volumes.

关键词： GPU/CUDA multiscale tensor reconstruction interactive volume visualization multiresolution rendering

来源：评论

学校读者我要写书评

暂无评论

Efficiently computing and updating triangle strips for real-time rendering

引用

COMPUTER-AIDED DESIGN 2000年第13期32卷 753-772页

作者： El-Sana, J Evans, F Kalaiah, A Varshney, A Skiena, S Azanli, E SUNY Stony Brook Dept Comp Sci Stony Brook NY 11794 USA Ben Gurion Univ Negev Dept Math & Comp Sci IL-84105 Beer Sheva Israel Schlumberger Houston TX 77056 USA Univ Maryland Dept Comp Sci College Pk MD 20742 USA

Triangle strips are a widely used hardware-supported data-structure to compactly represent and efficiently render polygonal meshes. In this paper we survey the efficient generation of triangle strips as well as their variants. We present efficient algorithms for partitioning polygonal meshes into triangle strips. Triangle strips have traditionally used a buffer size of two vertices, In this paper we also study the impact of larger buffer sizes and various queuing disciplines on the effectiveness of triangle strips. View-dependent simplification has emerged as a powerful tool for graphics acceleration in visualization of complex environments. However, in a view-dependent framework the triangle mesh connectivity changes at every frame making it difficult to use triangle strips. In this paper we present a novel data-structure, Skip Strip, that efficiently maintains triangle strips during such view-dependent changes. A Skip Strip stores the vertex hierarchy nodes in a skip-list-like manner with path compression. We anticipate that Skip Strips will provide a road-map to combine rendering acceleration techniques for static datasets, typical of retained-mode graphics applications, with those for dynamic datasets found in immediate-mode applications. (C) 2000 Elsevier Science Ltd. All rights reserved.

关键词： triangle strips multiresolution rendering view-dependent rendering graphics acceleration skip lists

来源：评论

学校读者我要写书评

暂无评论

multiresolution visualization of massive black oil reservoir models

引用

VISUAL COMPUTER 2019年第6-8期35卷 837-848页

作者： Abraham, Frederico Celes, Waldemar Pontifical Catholic Univ Rio de Janeiro Dept Comp Sci Tecgraf PUC Rio Inst Rua Marques de Sao Vicente 225 Rio De Janeiro Brazil

Recent advances in parallel architectures for numerical simulation of natural black oil reservoirs have allowed the use of very discretized domains. As a consequence, these simulations produce an unprecedented volume of data, which must be visualized in 3D environments for careful analysis and inspection. Conventional scientific visualization techniques are not viable on such large models, creating a demand for the development of scalable visualization solutions. In this paper, we propose a hierarchical multiresolution technique to render massively large black oil reservoir meshes. A new simplification algorithm specialized for such models is presented, which accurately represents boundary surfaces, while keeping the hexahedral mesh with good quality. Original model properties, wireframe and surface normals are mapped onto the simplified meshes through texture mapping. This allows the system to reuse the structure for different simulations that use the same geometry model. The viewer application is designed to guarantee a minimum refresh rate, allocating geometric detail where it is most needed, given the available hardware. Experimental results, considering up to 1.2 billion cell models, demonstrate the effectiveness of the proposed solution.

关键词： Real-time rendering Reservoir model rendering Mesh simplification algorithm multiresolution rendering Massive model visualization

来源：评论

学校读者我要写书评

暂无评论

Stereoscopic view-dependent visualization of terrain height fields

引用

IEEE TRANSACTIONS ON VISUALIZATION AND COMPUTER GRAPHICS 2002年第4期8卷 330-345页

作者： Güdükbay, U Yilmaz, T Bilkent Univ Dept Comp Engn TR-06533 Bilkent Turkey

Visualization of large geometric environments has always been an important problem of computer graphics. In this paper, we present a framework for the stereoscopic view-dependent visualization of large scale terrain models. We use a quadtree based multiresolution representation for the terrain data. This structure is queried to obtain the view-dependent approximations of the terrain model at different levels of detail. In order not to lose depth information, which is crucial for the stereoscopic visualization, we make use of a different simplification criterion, namely, distance-based angular error threshold. We also present an algorithm for the construction of stereo pairs in order to speed up the view-dependent stereoscopic visualization. The approach we use is the simultaneous generation of the triangles for two stereo images using a single draw-list so that the view frustum culling and vertex activation is done only once for each frame. The cracking problem is solved using the dependency information stored for each vertex. We eliminate the popping artifacts that can occur while switching between different resolutions of the data using morphing. We implemented the proposed algorithms on personal computers and graphics workstations. Performance experiments show that the second eye image can be produced approximately 45 percent faster than drawing the two images separately and a smooth stereoscopic visualization can be achieved at interactive frame rates using continuous multiresolution representation of height fields.

关键词： stereoscopic visualization terrain height fields multiresolution rendering quadtrees

来源：评论

学校读者我要写书评

暂无评论

Modeling of Earth’s Gravity Fields Visualization Based on Quad Tree

引用

Geo-Spatial Information Science 2010年第3期13卷 216-220页

作者： LUO Zhicai LI Zhenhai ZHONG Bo School of Geodesy and Geomatics Wuhan University 129 Luoyu Road Wuhan 430079 China Key Laboratory of Geospace Enviromnent and Geodesy Ministry of Education 129 Luoyu Road Wuhan 430079 China

The problems of the earth's gravity fields' visualization are both focus and puzzle currently. Aiming at multiresolution rendering, modeling of the Earth's gravity fields' data is discussed in the paper by using LOD algorithm based on Quad Tree. First, this paper employed the method of LOD based on Quad Tree to divide up the regional gravity anomaly data, introduced the combined node evaluation system that was composed of viewpoint related and roughness related systems, and then eliminated the T-cracks that appeared among the gravity anomaly data grids with different resolutions. The test results demonstrated that the gravity anomaly data grids' rendering effects were living, and the computational power was low. Therefore, the proposed algorithm was a suitable method for modeling the gravity anomaly data and has potential applications in visualization of the earth's gravity fields.

关键词： LOD Quad Tree earth’s gravity fields multiresolution rendering

来源：评论

学校读者我要写书评

暂无评论

LOD map - A visual interface for navigating multiresolution volume visualization

引用

IEEE TRANSACTIONS ON VISUALIZATION AND COMPUTER GRAPHICS 2006年第5期12卷 1029-1036页

作者： Wang, Chaoli Shen, Han-Wei Ohio State Univ Dept Comp Sci & Engn Columbus OH 43210 USA

In multiresolution volume visualization, a visual representation of level-of-detail (LOD) quality is important for us to examine, compare, and validate different LOD selection algorithms. While traditional methods rely on ultimate images for quality measurement, we introduce the LOD map - an alternative representation of LOD quality and a visual interface for navigating multiresolution data exploration. Our measure for LOD quality is based on the formulation of entropy from information theory. The measure takes into account the distortion and contribution of multiresolution data blocks. A LOD map is generated through the mapping of key LOD ingredients to a treemap representation. The ordered treemap layout is used for relative stable update of the LOD map when the view or LOD changes. This visual interface not only indicates the quality of LODs in an intuitive way, but also provides immediate suggestions for possible LOD improvement through visually-striking features. It also allows us to compare different views and perform rendering budget control. A set of interactive techniques is proposed to make the LOD adjustment a simple and easy task. We demonstrate the effectiveness and efficiency of our approach on large scientific and medical data sets.

关键词： LOD map knowledge representation perceptual reasoning multiresolution rendering large volume visualization

来源：评论

学校读者我要写书评

暂无评论

Adaptive CPU Scheduling to Conserve Energy in Real-Time Mobile Graphics Applications

Adaptive CPU Scheduling to Conserve Energy in Real-Time Mobi...

引用

4th International Symposium on Visual Computing

作者： Wu, Fan Agu, Emmanuel Lindsay, Clifford Worcester Polytech Inst Worcester MA 01609 USA

ISBN: (纸本)9783540896388

Graphics rendering on mobile devices is severely restricted by available battery energy. The frame rate of real-time graphics applications fluctuates clue to continual changes in the LoD, visibility and distance of scene objects, riser interactivity;complexity of lighting and animation, and many other factors. Such frame rate spikes waste precious battery energy. We introduce an adaptive CPU scheduler that predicts the applications workload from frame to frame and allocates just enough CPU cycles to render the scene at a target rate of 25 FPS. Since the applications workload needs to be re-estimated whenever the scenes LoD changes, we integrate our CPU scheduler with LoD management. To further save energy;we try to render scenes at the lowest LoD at which the user does not see visual artifacts on a given screen. Our integrated Energy-efficient Adaptive Real-time rendering (EARR) heuristic reduces energy consumption by up to 60% while maintaining acceptable image duality at interactive frame rates.

关键词： Energy conservation multiresolution rendering Real-time rendering CPU scheduling

来源：评论

学校读者我要写书评

暂无评论

LOD map - A visual interface for navigating multiresolution volume visualization

LOD map - A visual interface for navigating multiresolution ...

引用

IEEE Visualization Conference (Vis 2006)/IEEE Symposium on Information Visualization (InfoVis 2006)

作者： Wang, Chaoli Shen, Han-Wei Ohio State Univ Dept Comp Sci & Engn Columbus OH 43210 USA

关键词： LOD map knowledge representation perceptual reasoning multiresolution rendering large volume visualization

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：