Advances in Production Engineering & Management
Volume 18 | Number 1 | March 2023 | pp 49–65
https://doi.org/10.14743/apem2023.1.456
Spatial position recognition method of semi-transparent and flexible workpieces: A machine vision based on red light assisted
Bi, Q.L.; Lai, M.L.; Chen, K.; Liu, J.M.; Tang, H.L.; Teng, X.B.; Guo, Y.Y.
ABSTRACT AND REFERENCES (PDF) |
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A B S T R A C T
In the automatic sorting process, overlapping translucent and flexible workpieces on the conveyor belt, blurring the imaging edge features of translucent and flexible workpieces is a challenge to locate the upper and lower workpieces spatially, we propose a method for locating translucent and flexible workpieces spatially under the overlapping environment in conjunction with the most common automatic sorting of translucent and flexible workpieces such as infusion tube drip buckets. Firstly, we propose a rectangular surface light source based on 650 nm band and monocular CCD for imaging translucent workpieces such as infusion tube drip buckets and optimize the imaging parameters. Secondly, we study a feature matching recognition algorithm for flexible workpieces that are prone to deformation, construct a mapping relationship between the position of overlapping layers and imaging quality of translucent and flexible workpieces such as infusion tube drip buckets based on clarity and information entropy, and establish The mapping relationship between the position of the overlapping layers and the imaging quality of translucent and flexible workpieces such as infusion tube drip buckets is constructed based on clarity and information entropy, and a local spatial coordinate conversion model is established. Finally, the spatial positioning coordinates of overlapping and non-overlapping translucent and flexible workpieces in the local coordinate system are identified, and the results show that the imaging method and theory can be effectively applied to the identification of overlapping and spatial positioning coordinates in the automatic sorting of translucent workpieces such as infusion tube drip buckets.
A R T I C L E I N F O
Keywords • Machine vision; Image processing; Visual recognition; Feature matching; Imaging quality; Red light; Translucent and flexible workpieces; Infusion tube drip bucket; Smart manufacturing
Corresponding author • Lai, M.L.
Article history • Received 14 March 2023, Revised 12 April 2023, Accepted 15 April 2023
Published on-line • 29 April 2022
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