应用科学学报 ›› 2009, Vol. 27 ›› Issue (2): 167-171.

• 信号与信息处理 • 上一篇    下一篇

结合面绘制的GPU体绘制加速

葛军 舒华忠 鲍旭东 罗立民   

  1. 东南大学影像科学与技术实验室,南京 210096
  • 收稿日期:2008-07-19 修回日期:2008-11-06 出版日期:2009-04-01 发布日期:2009-04-01
  • 作者简介:葛军,博士生,研究方向: 医学图像处理、科学可视化,E-mail: green21th@163.com; 舒华忠,教授,博导,研究方向:医学图像处理、模式识别、DSP快速算法等,E-mail: shu.list@seu.edu.cn; 罗立民,教授,博导,研究方向:医学影像处理、科学可视化、图像分析、立体定向放射治疗等,E-mail: luo.list@seu.edu.cn

Accelerating GPU-Based Volume Rendering in Conjunction with Surface Rendering

  1. Laboratory of Image Science and Technology, Southeast University, Nanjing 210096, China
  • Received:2008-07-19 Revised:2008-11-06 Online:2009-04-01 Published:2009-04-01

摘要:

提出了一种改进的基于图形运算单元(graphic processing unit, GPU)的体绘制方法, 可用于影像数据的交互级可视化. 利用基于2D轮廓线的面绘制算法, 提取包含用户感兴趣数据的闭合曲面, 并将它作为基于GPU的光线投射算法的代理几何面, 进行快速体绘制. 通过代理几何面的绘制可减少光线的数量及采样长度,节省光线投射算法的时间. 将该方法应用于医学、工业等领域得到的数据结果表明,该方法在保证有效数据不丢失的情况下提高了绘制效率.

关键词: 体绘制, 图形运算单元, 光线投射

Abstract:

An improved GPU-based volume rendering method is presented for interactive visualization of image datasets. The closed 3D surface that warps the user-interested datapart is created using a 2D contour-based surface
rendering algorithm. The 3D surface is then used as proxy geometry for GPU-based ray-casting to achieve fast
volume rendering. With the rendering of proxy geometry, the number and sampling length of rays are reduced, and the ray-casting time saved. We implement the method on medical and industrial datasets, showing improvement of efficiency without any loss of interested dataparts.

Key words: volume rendering, graphic processing unit, ray-casting

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