检索结果-南通市图书馆

level-of-detail Rendering of Large-Scale Irregular Volume Datasets Using Particles

Journal of Computer Science & Technology 2010年第5期25卷 905-915页

作者： Takuma Kawamura Naohisa Sakamoto Koji Koyamada Member, IEEE Graduate School of Engineering Kyoto University Kyoto 6068501 Japan Center for the Promotion of Excellence in Higher Education Kyoto University Kyoto 6068501 Japan

This paper describes a level-of-detail rendering technique for large-scale irregular volume *** is well known that the memory bandwidth consumed by visibility sorting becomes the limiting factor when carrying out volume rendering of such *** develop a sorting-free volume rendering technique,we previously proposed a particle-based technique that generates opaque and emissive particles using a density function constant within an irregular volume cell and projects the particles onto an image plane with *** the density function changes significantly in an irregular volume cell,the cell boundary may become prominent,which can cause blocky *** the number of the sub-pixels increases,the required frame buffer tends to be *** solve this problem,this work proposes a new particle-based volume rendering which generates particles using metropolis sampling and renders the particles using the ensemble average. To confirm the effectiveness of this method,we applied our proposed technique to several irregular volume datasets,with the result that the ensemble average outperforms the sub-pixel average in computational complexity and memory usage. In addition,the ensemble average technique allowed us to implement a level of detail in the interactive rendering of a 71-million-cell hexahedral volume dataset and a 26-million-cell quadratic tetrahedral volume dataset.

关键词： large-scale irregular volume level-of-detail volume rendering of unstructured meshes

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Visualization and level-of-detail of metadata for interactive exploration of Sensor Web

引用

International Journal of Digital Earth 2014年第11期7卷 847-869页

作者： Byounghyun Yoo V.Judson Harward Imaging Media Research Center Korea Institute of Science and TechnologySeoulKorea Faculty of Arts and Sciences Harvard UniversityCambridgeMAUSA

There are several issues with Web-based search interfaces on a Sensor Web data *** can be difficult to(1)find the proper keywords for the formulation of queries and(2)explore the information if the user does not have previous knowledge about the particular sensor systems providing the *** investigate how the visualization of sensor resources on a 3D Web-based Digital Earth globe organized by level-of-detail(LOD)can enhance search and exploration of information by easing the formulation of geospatial queries against the metadata of sensor *** case study provides an approach inspired by geographical mashups in which freely available functionality and data are flexibly *** use PostgreSQL,PostGIS,PHP,and X3D-Earth technologies to allow the Web3D standard and its geospatial component to be used for visual exploration and LOD control of a dynamic *** goal is to facilitate the dynamic exploration of the Sensor Web and to allow the user to seamlessly focus in on a particular sensor system from a set of registered sensor networks deployed across the *** present a prototype metadata exploration system featuring LOD for a multiscaled Sensor Web as a Digital Earth application.

关键词： Sensor Web datavisualization Sensor Web data discovery and search level-of-detail metadata visualization Web3D standard extensible 3D graphics X3D geospatial component

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

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

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

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

在线全文

在线全文

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：