@inproceedings{oai:shizuoka.repo.nii.ac.jp:00014261,
 author = {Terada, Takamichi and Vo Ngoc, Khoi Nguyen and Nishigaki, Masakatsu and Ohki, Tetsushi},
 book = {Advanced Information Networking and Applications. Lecture Notes in Networks and Systems},
 month = {Mar},
 note = {The 36th International Conference on Advanced Information Networking and Applications (AINA-2022)
Conference Location: University of Technology Sydney (UTS), Sydney, Australia
Date of Conference: April 13-15, 2022, application/pdf},
 pages = {586--597},
 publisher = {Springer, Cham},
 title = {Improving Robustness and Visibility of Adversarial CAPTCHA Using Low-frequency Perturbation},
 volume = {450},
 year = {2022}
}