@article{chen2020siameseccr,
  title={SiameseCCR: a novel method for one-shot and few-shot Chinese CAPTCHA recognition using deep Siamese network},
  author={Chen, Zhe and Ma, Weifeng and Xu, Nanfan and Ji, Caoting and Zhang, Yulai},
  journal={IET Image Processing},
  volume={14},
  number={12},
  pages={2855--2859},
  year={2020},
  publisher={IET}
}