![]() Several somewhat naive approaches (in my opinion) were proposed in the HAD comments to solve this captcha, based on looking for straight lines. You must adjust a slider to select the undistorted version of the image. The image version of the CAPTCHA looked interesting and so I thought it might be fun to try and break it.įor those unfamiliar with MintEye, the image based CAPTCHAs look as follows: Posted in Uncategorized | 1 Reply Breaking the MintEye image CAPTCHA in 23 lines of PythonĪs an avid reader of HAD I was intrigued by this post explaining how someone had broken MintEye’s audio based CAPTCHA. In fact, the only non-trivial maths imported from OpenCV previously are the DCTs to decode the JPEGs. The point I’m trying to make is that Sobel is a very simple operator – that’s why it was created, as a crude approximation of the derivative of a 2D signal. #convert to grayscale (ITU-R 601-2 luma transform) So, here’s a solution in 34 lines of Python: Several people have suggested that importing OpenCV is cheating and as such the claim that MintEye was broken in 23 lines of Python is disingenuous.
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