摘要
为了增强传递函数的特征区分能力并简化交互模式,提出一种基于二维直方图图像分割和特征度量差异性分析的渐进式体绘制传递函数设计方法.通过渐进式地用不同的特征组成传递函数对目标区域进行逐步求精地分离,并在每次分离时采用面向数据分类的特征空间度量差异性的评估方法智能指导二维传递函数数值特征的选取.使用这一系列二维传递函数对目标区域进行多次分离,得到目标区域精确的分离结果;再利用此结果突出目标区域的显示,增强可视化效果.由于该方法借鉴了前人建立在对二维直方图图像进行normalized cut分割和层次聚类的交互方式,使得二维直方图的交互也非常简单便捷.实验结果表明,文中方法是有效的.
In order to strengthen transfer function（TF）＇s ability in identifying meaningful features and simplify interactive mode, we present a TF design method based on 2D histogram image segmentation with the guidance of feature difference evaluation. We compute different features to design 2D TFs and use these TFs to separate interesting structures in volume progressively. We also present a feature difference evaluation method to assist choosing features intelligently when designing 2D TFs. By applying these TFs in series to separate interesting structures in volume, we can get a fine separation result which will be highlighted in visualization to perfect rendering result. Besides, we learn from previous work and use normalized cut method to segment 2D histogram image in order to explore volumes hierarchically, which makes our interaction with transfer function more convenient. Some experimental results demonstrate the effectiveness of our method.
出处
《计算机辅助设计与图形学学报》
EI
CSCD
北大核心
2014年第10期1583-1592,共10页
Journal of Computer-Aided Design & Computer Graphics
基金
国家自然科学基金(61272225
91315302
60773143)
国家"八六三"高技术研究发展计划(2012AA041606)
国家"九七三"重点基础研究发展计划项目(2010CB328001)
关键词
体绘制
传递函数
特征评估
图像分割
volume rendering
transfer function
feature evaluation
image segmentation
