In this paper, we propose a Sigma-Lognormal based approach to generate character level CAPTCHAs. Next, we increase the robustness of the model by applying ideas ...

In this paper, we propose a Sigma-Lognormal based approach to generate character level CAPTCHAs. Next, we increase the robustness of the model by applying ideas ...

A Sigma-Lognormal based approach to generate character level CAPTCHAs which are resistant to a dictionary based attack and increase the robustness of the ...

Ramaiah and Govindaraju [52] proposed asigma lognormal model for character level CAPTCHA. The author designed a new character level CAPTCHA because word level ...

In this work, we present a automated handwritten CAPTCHA generation system by adding distortions to the Sigma-Lognormal representation of a handwritten word.

In this work, we present a automated handwritten CAPTCHA generation system by adding distortions to the Sigma-Lognormal representation of a handwritten word ...

A sigma-lognormal model for character level CAPTCHA generation ; 13th International Conference on Document Analysis and Recognition (ICDAR 2015) · Tunis, Tunesia.

A sigma-lognormal model for character level CAPTCHA generation. C Ramaiah, R Plamondon, V Govindaraju. 2015 13th International Conference on Document Analysis ...

A sigma-lognormal model for character level CAPTCHA generation. C Ramaiah, R Plamondon, V Govindaraju. 2015 13th International Conference on Document Analysis ...

Oct 30, 2024 · A sigma-lognormal model for character level CAPTCHA generation. ICDAR 2015: 966-970; 2014. [j58]. view. electronic edition via DOI; unpaywalled ...