Abstract
The correspondence of a stack of planar contours in ICT (industrial computed tomography)-based reverse engineering, a key step in surface reconstruction, is difficult when the contours or topology of the object are complex. Given the regularity of industrial parts and similarity of the inter-layer contours, a specialized shape-based inter-layer contours correspondence method for ICT-based reverse engineering was presented to solve the above problem based on the vectorized contours. In this paper, the vectorized contours extracted from the slices consist of three graphical primitives: circles, arcs and segments. First, the correspondence of the inter-layer primitives is conducted based on the characteristics of the primitives. Second, based on the corresponded primitives, the inter-layer contours correspond with each other using the proximity rules and exhaustive search. The proposed method can make full use of the shape information to handle industrial parts with complex structures. The feasibility and superiority of this method have been demonstrated via the related experiments. This method can play an instructive role in practice and provide a reference for the related research.
Highlights
Surface reconstruction from a stack of planar contours extracted from slices is a significant problem in reverse engineering
In this paper, considering the regularity of industrial parts and the characteristics of vector graphics, we present a shape-based inter-layer contours correspondence method
A novel shape-based inter-layer contours correspondence method was proposed for surface reconstruction in ICT-based reverse engineering
Summary
Surface reconstruction from a stack of planar contours extracted from slices is a significant problem in reverse engineering. In this paper, considering the regularity of industrial parts and the characteristics of vector graphics, we present a shape-based inter-layer contours correspondence method. In this method, inter-layers contours are vectorized, and represented by the primitives that are considered as basic correspondence elements. By lining from the layer center to the circle or arc center, such as SO2 and SO1 The basis of this method is contours vectorization according to the regular shape of industrial parts. The inter-layer correspondence of primitives includes two cases: inter-layer correspondence of a circle or an arc and inter-layer correspondence of a segment, which is elaborated in the following sub-sections
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