基于梯度自适应光照模型的统一计算设备构架实时体绘制技术研究.pdf

文档介绍：2156 南方医科大学学报(J South Med Univ) 2010;30(9)
窑窑
基于梯度自适应光照模型的统一计算设备构架实时体绘制技术研究
龚剑袁贠照强袁秦安袁冯前进(南方医科大学生物医学工程学院袁广东广州 510515)
摘要院医学体绘制技术中在组织轮廓清晰显示的前提下同时显示组织内部和外部结构是非常困难的因为增加透明
袁袁遥
度会造成结构之间的混淆而剖切显示则会带来结构上下文信息的缺失针对上述问题提出了一种基于体素梯度的自
袁遥袁
适应光照模型该模型中环境光等参数根据体素梯度自动调整 pute Unified Device
袁曰
Architecture)技术对算法进行加速实验结果表明该方法在保证实时交互的同时能够达到保留组织上下文信息的效果
遥袁袁遥
关键词院体绘制统一计算设备构架光照模型 GPU
曰曰曰
中图分类号院TP391 文献标识码院A 文章编号院1673-4254 2010 09-2156-05
渊冤
Real-time volume rendering based on gradient adaptive shading
GONG Jian, YUN Zhao-qiang, QIN An, FENG Qian-jin
School of Biomedical Engineering,Southern Medical University, Guangzhou 510515 china
Abstract: For medical image volume rendering, it is very difficult to simultaneously visualize interior and exterior structures
while preserving clear shape cues. Highly transparent transfer functions produce cluttered images with many overlapping
structures, while clipping pletely remove possibly important contextual information. To address this issue, A
gradient adaptive shading based illumination model is proposed and implemented in CUDA architecture. The coefficients of
ambient, diffuse and specular lighting are tuned adaptively according to gradient. The experiments show that our method is
capable of preserving 3-D contextual information in medical image dataset while still show clear boundaries with real-time
interactive s