At present, the three-dimensional reconstruction method of medical image, there are two main categories: indirect rendering method and direct rendering method.
当前，医学图像的三维重建方法主要有两大类：间接绘制方法和直接绘制方法。
And a new method to estimate the normal vector of the surface in Direct Voltime Rendering in Image Space is introduced.
在象空间中的直接体绘制方法中，本文提出了一种新的估计表面法向量的方法。
To present the structure of three-dimensional magnetosphere, the method of visualization of three-dimensional magnetosphere with the technique of direct volume rendering was promoted.
为了准确表现三维磁层的结构，提出了一种用直接体渲染技术对三维磁层粒子进行可视化的方法。
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