1 / 1

Over looks inquiry

Captcha Breaker. Recaptcha Image.

enye
Download Presentation

Over looks inquiry

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. CaptchaBreaker Recaptcha Image A CAPTCHA is a type of challenge-response test used in computing as an attempt to ensure that the response is generated by a person. Because other computers are supposedly unable to solve the CAPTCHA, any user entering a correct solution is presumed to be human. Our project aims to crack the CAPTCHA system design, that is , to be able to analyze and recognize the CAPTCHA challenge image and return a text answer to the question. Template matching postprocessing ? Input captcha • reCaptcha Website - Preprocessing If the CAPTCHA image is colored, we will convert it to a grey-level image. Any other preprocessing attempts such as initial answer guessing and useful segmentation methods may be added preprocessing • Pre-processing - Template Matching Engine template matching is simply use a template image in a database, scan through the CAPTCHA image and find the area that is most similar to the template. segmentation • Template matching • - Post-processing • It is a step that refining our CAPTCHA answer returned by our template matching engine. Here we may adopt some machine earning / global optimization techniques such as stimulated annealing, genetic programming, pattern recognition algorithms to solve the CAPTCHA. A B C Recognition Over looks inquiry • Post-processing S overlooks inquiry Result

More Related