为了将工业CT与快速原型直接集成, 提出了一种由工业CT切片图像直接生成快速原型层片数据的方法。首先对工业CT切片图像进行边缘提取、去噪、细化、连接和轮廓跟踪, 获取样件的内外结构轮廓点数据; 然后在相邻断层间建立轮廓匹配点对, 线性插值层间轮廓数据,以满足快速原型加工对层片厚度的要求, 并用三次B样条曲线对所有轮廓进行拟合; 最后经过轮廓数据点采样和内外轮廓判断后, 生成通用层接口文件输入快速原型系统。试验验证了该方法的有效性与正确性。

To integrate industrial computed tomography(CT) technology with rapid prototyping(RP) directly, a new method creating an RP slice file directly from industrial CT slicing images is presented. Firstly, through edge extraction and contour de-noising, connecting, thinning and tracing, the basic contour point data of the interior and exterior structure of a sample piece are obtained. Subsequently, matching point pairs between adjacent layers are established, interlayer contours are got by linear interpolation, and then all contours are fitted by cubic B-spline curves. Finally, a CLI file is created after contour point sampling and interior and exterior contour recognizing. The CLI file is then input into an RP system and a product is manufactured. Applications of the method prove that it is effective and feasible.