Calibrating effective focal length for central catadioptric cameras using one space line.

Fuqing Duan Fuchao Wu Mingquan Zhou Xiaoming Deng Yun Tian Calibrating effective focal length for central catadioptric cameras using one space line. 646-653 2012 33 Pattern Recognition Letters 5 http://dx.doi.org/10.1016/j.patrec.2011.05.012 db/journals/prl/prl33.html#DuanWZDT12