pp. 1539-1547
S&M2908 Letter https://doi.org/10.18494/SAM3792 Published: April 14, 2022 Detection and Localization of Small Defects in Large Glass-ceramics by Hybrid Macro and Micro Vision in Large Glass-ceramics by Hybrid Macro and Micro Vision [PDF] Weixian Li, Zhen Wang, Jie Deng, and Sijin Wu (Received January 6, 2022; Accepted February 22, 2022) Keywords: defect detection, 3D localization, glass-ceramic, optical imaging
A method of hybrid macro and micro vision to detect and locate sub-millimeter defects in meter-sized glass-ceramics is proposed. A 3D localization model of defects with dual camera imaging and triaxial linear motion is established mathematically. The system is calibrated using a coarse-fine chessboard. A macroscopic camera with a large field of view is used to detect the 2D planar coordinates of possible defects in a large glass-ceramic, then a microscope with a small field of view is utilized to obtain the depth coordinates of these defects by image sharpness evaluation using the triaxial linear stage. Experiments show that the calibrated defect detection and localization system with hybrid macro and micro vision can detect and locate sub-millimeter defects in large glass-ceramics.
Corresponding author: Weixian LiThis work is licensed under a Creative Commons Attribution 4.0 International License. Cite this article Weixian Li, Zhen Wang, Jie Deng, and Sijin Wu, Detection and Localization of Small Defects in Large Glass-ceramics by Hybrid Macro and Micro Vision in Large Glass-ceramics by Hybrid Macro and Micro Vision, Sens. Mater., Vol. 34, No. 4, 2022, p. 1539-1547. |