1. Captcha Breaker 技巧很強壯的大叔隊

2. Workflow Outline Segmentation – Human Visual System Segmentation – Color Filling Segmentation – Distortion Estimation Optical Character Recognition – Template Matching – Machine Learning / Pattern Recognition Vulnerability Hacking – (depend on dataset)

3. Segmentation Human Visual System Segmentation – Lin et al., Bio-Inspired Unified Model of Visual Segmentation System For Captcha Character Recognition, [NTU Master Thesis] Color-Filling Segmentation – Jeff et al., A low-cost attack on a Microsoft captcha, [ACM CCS 08] Distortion Estimation – G. Moy et al., Distortion Estimation Techniques in Solving Visual CAPTCHAs [IEEE CVPR 04]

4. Optical Character Recognition Template Matching http://en.wikipedia.org/wiki/Template_matching Machine Learning / Pattern Recognition Machine Learning Approaches to CAPTCHA Recognition Requiring Minimal Image Processing, [www.cs.ou.edu/~amy/courses/cs5033_fall2008/Tidwell_S hadoan.pdf] Breaking Visual CAPTCHAs with Naïve Pattern Recognition Algorithms [ACSAC 07] Using Machine Learning to Break Visual Human Interaction Proofs [NIPS 04]

5. Template matching

6. Dataset Xun6 reCaptcha Gmail application website China Websites – http://code.google.com/p/captcha-recognition/ http://code.google.com/p/captcha-recognition/ Free file host – http://en.wikipedia.org/wiki/JDownloader#Suppo rt_of_common_one-click_hosters http://en.wikipedia.org/wiki/JDownloader#Suppo rt_of_common_one-click_hosters