An improved fast algorithm for calculating the gradient of data field

	An improved fast algorithm for calculating the gradient of data field
	Zhong, Jia; Zou, Ziming
作者部门	运控部/科学卫星综合运控中心
会议录名称	ACM International Conference Proceeding Series
	2017
语种	英语
ISBN号	9781450352369
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. This paper designs an improved algorithm, based on properties of equal partial derivatives along axis after data linear interpolation, it removes a large number of repetitive calculations and redundant storage of partial derivatives, in traditional method. Finally, this paper verifies the algorithm validity with visualization experiments using the MHD simulation data to extract the magnetopause. © 2017 Copyright held by the owner/author(s).
关键词	Direct Volume Rendering Non-uniform Grid Data Trilinear Interpolation Gradient Of Data Mhd
会议名称	2017 International Conference on Computer Graphics and Digital Image Processing, CGDIP 2017
会议日期	July 2, 2017 - July 4, 2017
会议地点	Prague, Czech republic
收录类别	EI ; CPCI
文献类型	会议论文
条目标识符	http://ir.nssc.ac.cn/handle/122/6047
专题	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. An improved fast algorithm for calculating the gradient of data field[C],2017.