计算机应用 ›› 2011, Vol. 31 ›› Issue (08): 2221-2224.DOI: 10.3724/SP.J.1087.2011.02221

• 图形图像技术 • 上一篇    下一篇

基于最优化分块的大规模数据体绘制加速方法

彭伟,李建新,闫镔,童莉,陈健,管士勇   

  1. 信息工程大学 信息工程学院,郑州450002
  • 收稿日期:2011-03-03 修回日期:2011-04-28 发布日期:2011-08-01 出版日期:2011-08-01
  • 通讯作者: 彭伟
  • 作者简介:彭伟(1984-),男,江苏启东人,硕士研究生,主要研究方向:科学计算可视化、虚拟现实;李建新(1953-),男,浙江杭州人,教授,主要研究方向:智能信息处理与成像;闫镔(1976-),男,河南内黄人,副教授,博士,主要研究方向:X射线成像、三维图像处理。
  • 基金资助:

    国家863计划项目(2009AA012201)

Volume rendering acceleration method based on optimal bricking for large volume data

Wei PENG,Jian-xi LI,Bin YAN,Li TONG,Jian CHEN,Shi-yong GUAN   

  1. Institute of Information Engineering, University of Information Engineering, Zhengzhou Henan 450002, China
  • Received:2011-03-03 Revised:2011-04-28 Online:2011-08-01 Published:2011-08-01
  • Contact: Wei PENG

摘要: GPU加速体绘制已成为体可视化领域的研究热点,然而超出显存的大规模数据无法直接载入,成为GPU应用的瓶颈。分块技术能够在保证图像质量的条件下解决该问题,但分块数据的频繁加载和访问明显降低了绘制速度。针对上述问题,通过建立最优化分块模型得到了大规模数据的最优分块,并通过构造节点编号纹理和改进距离模板设计的方法进一步提高了基于八叉树的分块体绘制算法的绘制速度。实验结果表明,该方法加速效果明显。

关键词: 体绘制, 最优化分块, 八叉树, 节点编号纹理, 距离模板

Abstract: GPU-based volume rendering has become an active research area in the domain of volume visualization. Large volume data cannot be uploaded directly due to the limitation of GPU memory, which has been a bottleneck of the application of GPU. Bricking method could not only solve this problem, but also maintain the quality of original volume-rendered image. However, the data exchange via the graphics bus is really time consuming and will definitely degrade the render performance. As for these difficulties, the optimal bricking for large volume data was calculated by establishing the model for optimal bricking, and also a 3D texture named node code texture was constructed and distance template was improved to accelerate the octree-based bricking volume rendering. The experimental results illustrate that the proposed method can significantly accelerate the bricking-based volume rendering for large volume data.

Key words: volume rendering, optimal bricking, octree, node code texture, distance template

中图分类号: