Seok Han, Dong, Ronnie O. Serfa Juan, Min Woo Jung, Hyeong Woo Cha, and Hi Seok Kim. “Development of a Novel Fast Rotation Angle Detection Algorithm Using a Quasi-Rotation Invariant Feature Based on Sobel Edge”. Journal of Telecommunication, Electronic and Computer Engineering (JTEC) 9, no. 2-6 (June 1, 2017): 33–36. Accessed May 1, 2024. https://jtec.utem.edu.my/jtec/article/view/2430.