| 基于光线投射算法的脑血管体绘制技术 |
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| 引用本文： | 解立志,周明全,田沄,赵世凤.基于光线投射算法的脑血管体绘制技术[J].系统仿真学报,2012,24(9):1864-1867,1872. |
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| 作者姓名： | 解立志 周明全 田沄 赵世凤 |
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| 作者单位： | 1. 北京师范大学认知神经科学与学习国家重点实验室,北京,100875
2. 北京师范大学信息科学与技术学院,北京,100875 |
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| 基金项目： | 国家自然科学基金(61003134,61170170);北京市自然科学基金重点项目(4081002) |
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| 摘 要： | 针对分割之后的脑血管体数据场显示问题,在光线投射算法的基础上提出一种全新的体绘制方法。该算法首先对脑血管体数据场进行分类;在光线投射算法的基上,加权考虑脑血管边缘特性、视点与物体之间距离、光源与物体之间距离,提出多因素融合的颜色赋值方法;最后采用CUDA方法进行体绘制加速。实验结果表明,对分割之后的脑血管体数据场,能够实现符合人眼视觉特性的清晰显示,并能进行实时交互。
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| 关 键 词： | 光线投射算法 脑血管 体绘制 颜色赋值 CUDA |
Rendering Technology for Cerebrovascular Medical Volume Data Based on Ray Casting Algorithm |
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| XIE Li-zhi,ZHOU Ming-quan,TIAN Yun,ZHAO Shi-feng.Rendering Technology for Cerebrovascular Medical Volume Data Based on Ray Casting Algorithm[J].Journal of System Simulation,2012,24(9):1864-1867,1872. |
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| Authors: | XIE Li-zhi ZHOU Ming-quan TIAN Yun ZHAO Shi-feng |
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| Institution: | 1.National Key Laboratory of Cognitive Neuroscience and Learning,Beijing Normal University,Beijing 100875,China; 2.College of Information Science and Technology,Beijing Normal University,Beijing 100875,China) |
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| Abstract: | To show the cerebrovascular volume date segmented from medical images,a new integration of multi-factor volume rendering algorithm was proposed.Firstly,the cerebral vascular volume data was classified into vascular and background voxels.Secondly,in the base of Ray-Casting,a new integration of multi-fusion volume rendering algorithm was proposed,considering cerebrovascular edge features,the distance between the viewpoint and the object,and the distance of the light source and the object.Finally,volume rendering was accelerated by using CUDA.The experimental results show that the cerebral vascular volume data can be displayed clearly,which is more coincident with the human vision,and real-time interaction. |
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| Keywords: | Ray Casting cerebrovascular volume rendering color assignment CUDA |
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