一种基于CT图像反求技术的实体几何造型方法

A New Method for Solid Modeling Based on Reverse Technology of CT Images

基于 CT图像的反求是反求工程中的重要内容 ,由 CT图像反求重建出的表面模型只包含了表面几何信息 ,而实体几何模型具有完备的几何和拓扑信息。针对 CAD造型系统中实体模型的特点 ,本文提出一种基于 CT图像反求技术的实体几何造型方法。应用 CT图像反求技术重建出物体的三维表面模型 ,在重建出的拟合曲面三角片序列的基础上 ,采用半边结构来表达重建的表面模型 ,并将该过程作为本研究所开发的特征造型原型系统 3D-Modeler2 .

Surface reconstruction from CT images is an important work in reverse engineering. The model reconstructed from CT images is a surface model, and only surface geometry information is included. A solid model includes full geometry and topology information. With a view to the character of solid model in CAD solid modeling system, this paper presents a new method for solid modeling based on reverse technology of CT images. Using reverse technology of CT images, surface model is reconstructed. Based on a series of triangles of reconstructed surface, reconstructed surface model is represented by half edge structure. This is regarded as a new method of solid modeling in feature modeling prototype system-3D Modeler 2.0 which is developed by our laboratory.