一种基于图像序列轮廓三维重建表面的任意切面图像提取及纹理映射有效方法

Effective Method for Arbitrary Clip Plane Extraction and Texture Mapping Based on Contour Data of Images

针对三维重建后的表面模型的任意剖切,首先通过对象的序列轮廓去掉图像背景,然后计算其模型及图像空间中包围盒和剖切平面的交面,利用向量叠加原理及立方体线性插值方法快速提取交面图像,经Alpha测试后映射到模型空间中相应切面上。实验表明,该方法在克服面绘制技术不能体现内部数据缺点的同时,有效地提高了模型任意剖切时剖面纹理绘制速度。

Targeted to arbitrary cutting of surface model by 3D reconstruction, this paper first removed the object＇ s background by its contour data, and then computed the intersecting polygon of cutting plane and bounding box of the model in model and image spaces. Then fast extracted the texture of section planes with vector superposition principle and cubic linear interpolation. Last the section texture passing alpha test was mapped to the clip section in the model space. Experiments＇ testing shows the method solves the problem that inner data is invisible by surface rendering,effectively improving the texture rendering speed of arbitrary clip.