Hsu, Wei-Chih, Tsan-Ying Yu, and Kuan-Liang Chen. “A Binarization Approach for Wafer ID Based on Star-Shape Filter”. International Journal of Engineering and Technology Innovation 2, no. 3 (July 1, 2012): 172-183. Accessed April 19, 2021. https://ojs.imeti.org/index.php/IJETI/article/view/76.