A. Halim, M., Ruhaiyem, N., Fauzi, E., Jamil, M., & Mohamed, A. (2016). Automatic Laser Welding Defect Detection and Classification using Sobel-Contour Shape Detection. Journal of Telecommunication, Electronic and Computer Engineering (JTEC), 8(6), 157–160. Retrieved from https://jtec.utem.edu.my/jtec/article/view/1266