Automating Transfer Function Design with Valley Cell‐Based Clustering of 2D Density Plots

	Automating Transfer Function Design with Valley Cell‐Based Clustering of 2D Density Plots
	Wang, Yunhai; Zhang, Jian; Lehmann, Dirk J.; Theisel, Holger; Chi, Xuebin
刊名	COMPUTER GRAPHICS FORUM
	2012
英文摘要	Two-dimensional transfer functions are an effective and well-accepted tool in volume classification. The design of them mostly depends on the user's experience and thus remains a challenge. Therefore, we present an approach in this paper to automate the transfer function design based on 2D density plots. By exploiting their smoothness, we adopted the Morse theory to automatically decompose the feature space into a set of valley cells. We design a simplification process based oncell separability to eliminate cells which are mainly caused by noise in the original volume data. Boundary persistence is first introduced to measure the separability between adjacent cells and to suitably merge them. Afterward, a reasonable classification result is achieved where each cell represents a potential feature in the volume data. This classification procedure is automatic and facilitates an arbitrary number and shape of features in the feature space. The opacity of each feature is determined by its persistence and size. To further incorporate the user's prior knowledge, a hierarchical feature representation is created by successive merging ofthe cells. With this representation, the user is allowed to merge or split features of interest and set opacity and color freely. Experiments on various volumetric data sets demonstrate the effectiveness and usefulness of our approach in transfer function generation. © 2012 The Author(s).(31 refs)
收录类别	SCI
原文出处	http://onlinelibrary.wiley.com/doi/10.1111/j.1467-8659.2012.03122.x/epdf
语种	英语
内容类型	期刊论文
源URL	[http://ir.siat.ac.cn:8080/handle/172644/4166]
专题	深圳先进技术研究院_数字所
作者单位	COMPUTER GRAPHICS FORUM
推荐引用方式 GB/T 7714	Wang, Yunhai,Zhang, Jian,Lehmann, Dirk J.,et al. Automating Transfer Function Design with Valley Cell‐Based Clustering of 2D Density Plots[J]. COMPUTER GRAPHICS FORUM,2012.
APA	Wang, Yunhai,Zhang, Jian,Lehmann, Dirk J.,Theisel, Holger,&Chi, Xuebin.(2012).Automating Transfer Function Design with Valley Cell‐Based Clustering of 2D Density Plots.COMPUTER GRAPHICS FORUM.
MLA	Wang, Yunhai,et al."Automating Transfer Function Design with Valley Cell‐Based Clustering of 2D Density Plots".COMPUTER GRAPHICS FORUM (2012).