A. Halim, M.A., N.I.R. Ruhaiyem, E.R.I. Fauzi, M.S.C. Jamil, and A.S.A. Mohamed. “Automatic Laser Welding Defect Detection and Classification Using Sobel-Contour Shape Detection”. Journal of Telecommunication, Electronic and Computer Engineering (JTEC) 8, no. 6 (September 1, 2016): 157–160. Accessed December 15, 2025. https://jtec.utem.edu.my/jtec/article/view/1266.