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A comprehensive process of reverse engineering from 3D meshes to CAD models

机译：从3D网格到CAD模型的全面反向工程过程

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In an industrial context, most manufactured objects are designed using CAD (Computer-Aided Design) software. For visualization, data exchange or manufacturing applications, the geometric model has to be discretized into a 3D mesh composed of a finite number of vertices and edges. However, the initial model may sometimes be lost or unavailable. In other cases, the 3D discrete representation may be modified, e.g. after numerical simulation, and no longer corresponds to the initial model. A retro-engineering method is then required to reconstruct a 3D continuous representation from the discrete one. In this paper, we present an automatic and comprehensive retro-engineering process dedicated mainly to 3D meshes obtained initially by mechanical object discretization. First, several improvements in automatic detection of geometric primitives from a 3D mesh are presented. Then a new formalism is introduced to define the topology of the object and compute the intersections between primitives. The proposed method is validated on 3D industrial meshes.
机译：在工业环境中，大多数制造对象都是使用CAD（计算机辅助设计）软件进行设计的。对于可视化，数据交换或制造应用，必须将几何模型离散化为由有限数量的顶点和边组成的3D网格。但是，初始模型有时可能会丢失或不可用。在其他情况下，例如，可以修改3D离散表示。经过数值模拟后，不再与初始模型相对应。然后需要一种改造工程方法，以从离散模型中重建3D连续表示。在本文中，我们提出了一种自动且全面的逆向工程流程，该流程主要致力于通过机械对象离散化最初获得的3D网格。首先，提出了从3D网格自动检测几何图元的一些改进。然后引入一种新的形式主义来定义对象的拓扑并计算基元之间的交集。该方法在3D工业网格上得到了验证。

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