基于Shear-Warp的预合成体绘制方法  

Pre-Integrated Volume Rendering Based on Shear-Warp

作　　者：李彬[1] 田联房[1] 陈萍[2] 毛宗源[1] 

机构地区：[1]华南理工大学自动化科学与工程学院,广东广州510640 [2]广州医学院第一附属医院核医学科,广东广州510120

出　　处：《华南理工大学学报（自然科学版）》2007年第5期30-34,共5页Journal of South China University of Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目(30570458);广东省自然科学基金资助项目(05006530);广州市番禺区科技攻关项目(2005-Z-55-1)

摘　　要：为提高用Shear-Warp重建的三维医学图像的质量,提出了一种改进的基于Shear-Warp的预合成体绘制算法IPVR.该算法采用预合成体绘制技术,在重采样过程中,结合体绘制方程和光照模型,确定最终的重采样值并合成中间图像,从而消除标准Shear-Warp算法中因欠采样而产生的混淆现象.实验证明该方法满足实时体绘制要求,显示效果较好.In order to improve the quality of the 3D medical image reconstructed via Shear-Warp, an improved pre-integrated volume rendering （IPVR） algorithm based on Shear-Warp is proposed, in which the volume rendering equation and the light model are adopted to determine the final re-sampling value and to construct an intermediate image. Thus, the aliasing artifacts resulting from the under-sampling in the standard Shear-Warp algorithm can be avoided by the pre-integrated volume rendering technology. Experimental results demonstrate that the proposed method meets the requirement of real-time volume rendering with good display performance.

关 键 词：预合成体绘制 SHEAR-WARP 光学模型 光照模型 

分 类 号：TP391.4[自动化与计算机技术—计算机应用技术] R319[自动化与计算机技术—计算机科学与技术]