1. CAPTCHA recognition using deep learning with attached binary images;Thobhani;Electronics,2020
2. A simple generic attack on text captchas;Gao,2016
3. A generative vision model that trains with high data efficiency and breaks text-based CAPTCHAs
4. The end is nigh: Generic solving of text-based CAPTCHAs;Bursztein,2014
5. Recognition of merged characters in text based CAPTCHAs;Hussain,2016