The solution of data gradient on nonuniform grid in direct volume rendering
文献类型：会议论文
| 作者 | Zhong, Jia; Zou, Ziming |
| 出版日期 | 2017 |
| 会议日期 | July 2, 2017 - July 4, 2017 |
| 会议地点 | Prague, Czech republic |
| 关键词 | Direct Volume Rendering Non-uniform Grid Data Trilinear Interpolation Solution Of Data Gradient Mhd |
| 英文摘要 | It is an important part of extracting the border in volume visualization for computing gradient feature of spatial data accurately and rapidly. The traditional method of volume visualization is to resample the data of model or observation distributing on non-uniform grids of three-dimensional Euclidean space by trilinear interpolation to uniform grids, then calculate gradient features of all grid vertex data. Based on the law of the change of partial derivatives along axis, this paper proposes a new method, to solve the gradient by mapping the partial derivative to a uniform grid space directly after solving it on a non-uniform grid. When the data value in three-dimensional space corresponds to quadratic function distribution, the new method, theoretically, has a higher accuracy than the old method. Finally, this paper verifies the algorithm validity with visualization experiment using the MHD simulation data to extract the magnetopause. Therefore, this paper argues that whether the law of the change of partial derivatives is linear or not and the step of grid along axis are the judgements of sequence of interpolation and feature calculation. © 2017 Association for Computing Machinery. |
| 会议录 | ACM International Conference Proceeding Series
 |
| 语种 | 英语 |
| ISBN号 | 9781450352369 |
| 源URL | [http://ir.nssc.ac.cn/handle/122/6046]  |
| 专题 | 国家空间科学中心_运控部/科学卫星综合运控中心 |
| 推荐引用方式 GB/T 7714 | Zhong, Jia,Zou, Ziming. The solution of data gradient on nonuniform grid in direct volume rendering[C]. 见:. Prague, Czech republic. July 2, 2017 - July 4, 2017. |
入库方式： OAI收割
来源：国家空间科学中心
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