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"Breaking text-based CAPTCHAs with variable word and character orientation."
Oleg Starostenko et al. (2015)
- Oleg Starostenko, Claudia Cruz-Perez, Fernando Uceda-Ponga, Vicente Alarcón Aquino:
Breaking text-based CAPTCHAs with variable word and character orientation. Pattern Recognit. 48(4): 1101-1112 (2015)
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