基于表层剥离原理的传递函数设计

针对体绘制领域目前存在的计算开销、经验提取和复杂人工干预等几个重要的应用问题，提出了传递函数设定的表层剥离算法。表层剥离算法通过单程交越检测和高梯度比例边缘检测，解决了表层起伏现象导致的分类误差较大，需要复杂的人工干预调整的问题；避免引入高阶偏导等复杂的计算，保持了较低的计算开销；而且形成了一种简单且能发挥用户直觉，具有较高自动化成分的传递函数设定方式，取得了较好的效果。据此开发的普及型医学图像分析系统验证了算法的有效性。

Transfer function design based on principle of stripping surface layer

In order to resolve several important problems existing in volume rendering applications, such as intensive computing cost, difficulty in utilizing users' practical experience and demand for complex manual intervention, a new algorithm for transfer function design, the Stripping Surface Layer Algorithm (SSLA) was proposed.Through adopting detecting across over and detecting with high gradient proportion distribution, firstly, SSLA evidently reduced the errors caused by the fluctuation of the surface layer, ...