| 基于线性八叉树光线投射算法在云可视化方面的应用 |
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| 引用本文： | 谢永华,王畅,袁复兴.基于线性八叉树光线投射算法在云可视化方面的应用[J].科学技术与工程,2014,14(30). |
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| 作者姓名： | 谢永华 王畅 袁复兴 |
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| 作者单位： | 1. 南京信息工程大学计算机与软件学院,南京210044;南京信息工程大学江苏省网络监控中心,南京210044
2. 南京信息工程大学计算机与软件学院,南京,210044 |
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| 基金项目： | 国家高技术研究发展计划（863计划）;国家自然科学基金项目（面上项目，重点项目，重大项目） |
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| 摘 要： | 针对传统体绘制算法采样效率低,内存消耗大,绘制速度慢等缺点,提出了基于线性八叉树的光线投射算法并用于真实云图可视化。该方法首先通过线性八叉树对传统光线投射算法和存储进行优化加速,并结合Blinn-Phong光照模型增强每个体素的色彩渲染;然后采用合成公式求累积像素值。利用明暗计算的效果显示云的边界面,最终实现云数据的可视化。实验仿真结果表明,该算法在增强绘制效果和加快绘制速度方面的有效性。
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| 关 键 词： | 云 线性八叉树 光线投射 光照模型 可视化 |
| 收稿时间： | 2014/5/12 0:00:00 |
| 修稿时间： | 2014/6/18 0:00:00 |
Ray castingSalgorithm based on linear octree structure for cloudvisualization |
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| XIE Yong-hu,and YUAN Fu-xing.Ray castingSalgorithm based on linear octree structure for cloudvisualization[J].Science Technology and Engineering,2014,14(30). |
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| Authors: | XIE Yong-hu and YUAN Fu-xing |
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| Institution: | SchoolSofSComputerSandSSoftware,SNanjingSUniversitySofSInformationSScienceS STechnology,SNanjing S |
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| Abstract: | Aiming at the low efficiency of sampling, big memory consumption, slow speed of drawing shortcomings of traditional volume rendering algorithm, this paper puts forward the light projection algorithm based on linear octree is used for real cloud image visualization. This method first by linear octree optimize traditional casting algorithm and the storage speed, and combining the Blinn-Phong illumination model enhance colour rendering of ividual element , then use the synthesis formula for cumulative pixel values, calculated by use of light and shade effect shows that the boundary of the cloud ,and realize the cloud visualization. Experimental simulation results show that the effectiveness of the proposed algorithm about enhancing rendering effect and rendering speed. |
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| Keywords: | cloud linear octree ray casting illumination model visualization |
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