一种基于快速直接插值的光线投射法

A Ray-casting Approach Based on Rapid Direct Interpolation

光线投射法是目前医学图像三维可视化领域应用最广泛的体绘制技术。本文通过对光线投射法原理的深入研究,针对传统三线性插值中存在的缺陷,提出了一种快速直接的插值方法,并对两种方法进行了实例验证和比较。实验结果表明本文提出的直接插值方法具有速度快、效率高等优点,在医学图像三维可视化领域具有重要的应用价值。

Ray-casting is the most widely used volume rendering approach in 3-D visualization of medical images. A new rapid and direct interpolation method is presented by deeply researching ray-casting approach and the disadvantage in traditional tri-linear interpolation method. After testing and comparing to the two methods,the results show our direct interpolation method is faster and more efficient than tri-linear interpolation method. It is valuable in application of 3-D visualization of medical images.