工业CT切片序列任意方向剖面的绘制方法

为获得工业CT切片序列在三维空间任意方向的剖面，提出了一种基于三维纹理映射技术的任意剖面绘制方法。该方法首先把工业CT图片序列存储为体数据，然后使用传递函数对体数据进行分类，并将分类处理后的体数据定义为三维纹理，结合人机交互给出的平面参数计算出剖切多边形各顶点及其对应的纹理坐标，最后进行纹理映射得到剖面图像。该方法的特点是利用图形处理器支持的纹理映射功能完成剖面像素的采样和插值。实验结果表明，该方法成像质量较高，显示速度较快，能够满足人机交互实际应用需要。

Arbitrary planes rendering algorithm of industrial CT serial images

In order to obtain arbitrary planes of industrial CT volume data, a new fast section display algorithm based on 3D texture mapping was proposed. Firstly, industrial CT serial images were loaded in sequence and stored as volume data. Secondly, these data were defined as 3D texture after transforming by the transfer function. Then according to the plane parameters given by the user, the cutting polygon on the section plane was calculated, which made a preparation for the calculation of corresponding 3D texture coordinates. Finally, a section plane was obtained by mapping conducted. The main feature of this method is that it completes sampling and interpolation with texture mapping supported by the graphics processor. The experimental results show the presented algorithm could capture the slice data in arbitrary direction，and also satisfy the speed requirements of the Human-Computer Interaction.