There are two key techniques in reverse engineering, the numeralization and surface reconstruction of 3D objects.
三维物体的数字化技术及曲面重构技术是逆向工程的两个核心问题。
英语百科
Surface reconstruction
Surface reconstruction refers to the process by which atoms at the surface of a crystal assume a different structure than that of the bulk. Surface reconstructions are important in that they help in the understanding of surface chemistry for various materials, especially in the case where another material is adsorbed onto the surface.