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Effective Mean Square Differences: A Matching Algorithm for Highly Similar Sheet Metal Parts
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Effective Mean Square Differences: A Matching Algorithm for Highly Similar Sheet Metal Parts
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Journal Article
Effective Mean Square Differences: A Matching Algorithm for Highly Similar Sheet Metal Parts
2023
Overview
The accurate identification of highly similar sheet metal parts remains a challenging issue in sheet metal production. To solve this problem, this paper proposes an effective mean square differences (EMSD) algorithm that can effectively distinguish highly similar parts with high accuracy. First, multi-level downsampling and rotation searching are adopted to construct an image pyramid. Then, non-maximum suppression is utilised to determine the optimal rotation for each layer. In the matching, by re-evaluating the contribution of the difference between the corresponding pixels, the matching weight is determined according to the correlation between the grey value information of the matching pixels, and then the effective matching coefficient is determined. Finally, the proposed effective matching coefficient is adopted to obtain the final matching result. The results illustrate that this algorithm exhibits a strong discriminative ability for highly similar parts, with an accuracy of 97.1%, which is 11.5% higher than that of the traditional methods. It has excellent potential for application and can significantly improve sheet metal production efficiency.
Publisher
MDPI AG,MDPI
