摘要
在三维数据可视化的应用中,经常要求保留体数据外部组织的同时透视内部某一兴趣区,而这一过程的实现通常需要对三维数据进行预处理后才能取得较好的效果。从体绘制的传统光学模型出发,推导出一种可交互调节的体绘制光学模型。通过在分类信息中引入透射光对数据显示作用的计算,建立了基于内部兴趣区的透视光线模型,在保留外部组织半透明的同时,无需对三维数据进行预处理来实现较传统模型更好的透视效果。实验证明:该方法能以大于20 f/s的速度完成交互,且与传统模型相比有着更好的透视效果。本模型可有效提高用户对三维数据的特征识别能力,为三维数据的有效分析提供理论依据。
In the application of 3D data visualization, demands on insight into the inner region-of-interest （ROI） of volume are often made while keeping the outer tissue visible. However, a better effect is usually achieved after 3D data has already been preprocessed. In this paper, according to the traditional optical model of volume rending, an interactive optical model is deduced. The calculations on the transmitted light effect of 3D data are introduced in the classifying information. And a perspective ray model based on inner region of interests is constructed. In this model, a better perspective effect is gotten without any preprocessing while keeping the outer tissues semi-transparent. The experiment proves that this method produced a more intuitive result than the traditional model together keeping the frame rates greater than 20 f/s. Using this model, the ability to recognize the feather of 3D data is improved and the theoretic supports are provided for the effective analysis on 3D data.
出处
《光学学报》
EI
CAS
CSCD
北大核心
2009年第7期1842-1848,共7页
Acta Optica Sinica
基金
国家自然科学基金(60575016)资助项目
关键词
光学模型
体绘制
传递函数
交互
兴趣区
optical model
volume rendering
transfer function
interactive
region of interests
