There are two key techniques in reverse engineering, the numeralization and surface reconstruction of 3D objects.

三维物体数字化技术及曲面重构技术是逆向工程问题。

Hereinto, the numeralization of 3D prototype is the firstly important process.The accuracy of the objects’ numeralization will influence the quality of the digital reconstruction of the objects.

三维原型数字化技术是逆向工程中首要环节，其得到原型数据精度将直接影响到重建模型质量。