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"A sigma-lognormal model for character level CAPTCHA generation."
Chetan Ramaiah, Rejean Plamondon, Venu Govindaraju (2015)
- Chetan Ramaiah, Rejean Plamondon, Venu Govindaraju:
A sigma-lognormal model for character level CAPTCHA generation. ICDAR 2015: 966-970
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