Yunhang Shen, Rongrong Ji, Donglin Cao, Min Wang. Hacking Chinese Touclick CAPTCHA by Multi-Scale Corner Structure Model with Fast Pattern Matching. In Kien A. Hua, Yong Rui, Ralf Steinmetz, Alan Hanjalic, Apostol Natsev, Wenwu Zhu, editors, Proceedings of the ACM International Conference on Multimedia, MM '14, Orlando, FL, USA, November 03 - 07, 2014. pages 853-856, ACM, 2014. [doi]
Abstract is missing.