[IEEE 2016 23rd International Conference on Pattern Recognition (ICPR) - Cancun, Mexico (2016.12.4-2016.12.8)] 2016 23rd International Conference on Pattern Recognition (ICPR) - Edge chain detection by applying Helmholtz principle on gradient magnitude mapLu, Xiaohu; Yao, Jian; Li, Li; Yahui Liu, ; Wei Zhang, · 2016