基于STL格式三维医学模型的可视化研究  

Research of three-dimensional medical model visualization based on the STL file format

作　　者：易法令[1] 徐文华[1] 黄展鹏[1] 

机构地区：[1]广东药学院医药信息工程学院,广州510006

出　　处：《北京生物医学工程》2015年第1期1-6,共6页Beijing Biomedical Engineering

基　　金：广东省科技计划项目(2011B010200043)资助

摘　　要：目的把STL文件格式应用到医学模型的存储,通过设定三维医学模型的不同部分的颜色以提升模型的三维可视化效果。方法针对STL文件格式表示人体解剖模型色彩单一的问题,对STL文件内容进行了修改:在三角形几何位置信息中加入了颜色信息,通过颜色信息来区分人体解剖模型不同组成部分之间的关系。在三维医学模型不同组成部分边界划分过程中,通过建立二维屏幕坐标与三维模型坐标之间的关系,把屏幕上划分的边界映射到三维模型上,并应用连接算法保证三维边界的封闭性,最后采用类种子填充算法,实现边界内区域的颜色填充。结果通过颜色区分后的医学模型能够更准确地描述模型的不同组成部分,有更好的三维可视化效果。结论边界划分与区域填充算法能够很好地实现三维模型的区域着色,经过改进后的STL文件能够有效地存储彩色的三维医学模型。Objective On the basis of the STL file format being applied to store the medical model data, the three-dimensional visualization effect of the medical model can be enhanced by setting the color of the different parts of the model. Methods The STL file format represents object without any color in anatomical models. We add color information in the reserved location of triangle information, so the relations can be distinguished between different components of anatomical model. In the process of partitioning different components on the three-dimensional medical model,two-dimensional screen boundaries of different components are mapped into the three-dimensional model through establishing relationship between two-dimensional screen coordinate and the three-dimensional model coordinate. The join algorithm is employed to ensure the closure of three-dimensional boundary. And an algorithm similar to the seed-filling is applied to fill the color information of the area within the boundaries. Results The model with color information can describe the different components of the medical model more accurately, and possesses better three-dimensional visualization effects. Conclusions The boundary-partitioning and the area-filling algorithm can achieve a three-dimensional model with areas colored, and the enhanced STL file format can efficiently store colored three-dimensional medical model data.

关 键 词：STL文件格式 三维医学模型 可视化 颜色属性表 边界划分 

分 类 号：R318[医药卫生—生物医学工程] TP391.41[医药卫生—基础医学]