Irregular Workpiece Template-Matching Algorithm Using Contour Phase

The current template-matching algorithm can match the target workpiece but cannot give the position and orientation of the irregular workpiece. Aiming at this problem, this paper proposes a template-matching algorithm for irregular workpieces based on the contour phase difference. By this, one can f...

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Bibliographic Details
Published inAlgorithms Vol. 15; no. 9; p. 331
Main Authors Su, Shaohui, Wang, Jiadong, Zhang, Dongyang
Format Journal Article
LanguageEnglish
Published Basel MDPI AG 01.09.2022
Subjects
Accuracy
Algorithms
Contour matching
contour phase difference
Efficiency
irregular workpiece
Mathematical analysis
Phase matching
Robots
Rotation
rotation angle
Template matching
Vision systems
Workpieces
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Summary:The current template-matching algorithm can match the target workpiece but cannot give the position and orientation of the irregular workpiece. Aiming at this problem, this paper proposes a template-matching algorithm for irregular workpieces based on the contour phase difference. By this, one can firstly gain the profile curve of the irregular workpiece by measuring its radius in orderly fashion and then, calculate the similarity of the template workpiece profile and the target one by phase-shifting and finally, compute the rotation measure between the two according to the number of phase movements. The experimental results showed that in this way one could not only match the shaped workpiece in the template base accurately, but also accurately calculate the rotation angle of the irregular workpiece relative to the template with the maximum error controlled within 1%.
ISSN:1999-4893
1999-4893
DOI:10.3390/a15090331