Cheng, Du, and Leng Biao. “Tunnel Face Image Segmentation Optimization”. International Journal of Recent Contributions from Engineering, Science & IT (iJES) 2, no. 2 (May 3, 2014): pp. 32–35. Accessed April 19, 2024. https://online-journals.org/index.php/i-jes/article/view/2739.