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Algorithm for a de-captcha project

Scheduled Pinned Locked Moved Algorithms
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  • S Offline
    S Offline
    Sepirothftw
    wrote on last edited by
    #1

    Hello all, first of all im sorry if its the wrong place for this question. I am trying to decaptcha the following captcha: [IMG]http://i26.tinypic.com/wrazt.png\[/IMG\] what i am trying to do is removing the letters from the rest of the image. I am using Matlab atm but will do it in C# i think. its where i stucked, since all texture on background and letters are same, i can't find a proper way of doing it. Im looking for your suggestions, thanks in advance ps: its not a hacking project or so, never will be used for spamming or other purposes.

    L T 4 Replies Last reply
    0
    • S Sepirothftw

      Hello all, first of all im sorry if its the wrong place for this question. I am trying to decaptcha the following captcha: [IMG]http://i26.tinypic.com/wrazt.png\[/IMG\] what i am trying to do is removing the letters from the rest of the image. I am using Matlab atm but will do it in C# i think. its where i stucked, since all texture on background and letters are same, i can't find a proper way of doing it. Im looking for your suggestions, thanks in advance ps: its not a hacking project or so, never will be used for spamming or other purposes.

      L Offline
      L Offline
      Lost User
      wrote on last edited by
      #2

      After blurring it and turning up the contrast a bit it suddenly looked much easier to do OCR on, so that may help

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      • S Sepirothftw

        Hello all, first of all im sorry if its the wrong place for this question. I am trying to decaptcha the following captcha: [IMG]http://i26.tinypic.com/wrazt.png\[/IMG\] what i am trying to do is removing the letters from the rest of the image. I am using Matlab atm but will do it in C# i think. its where i stucked, since all texture on background and letters are same, i can't find a proper way of doing it. Im looking for your suggestions, thanks in advance ps: its not a hacking project or so, never will be used for spamming or other purposes.

        L Offline
        L Offline
        Lost User
        wrote on last edited by
        #3

        Write an algorithm that finds the largest blocks of white. Once you got that list, start coloring those blocks using the floodfill-algo. Lastly, drop all other colors :)

        Some things Man was never meant to know. For everything else, there's Google.

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        • S Sepirothftw

          Hello all, first of all im sorry if its the wrong place for this question. I am trying to decaptcha the following captcha: [IMG]http://i26.tinypic.com/wrazt.png\[/IMG\] what i am trying to do is removing the letters from the rest of the image. I am using Matlab atm but will do it in C# i think. its where i stucked, since all texture on background and letters are same, i can't find a proper way of doing it. Im looking for your suggestions, thanks in advance ps: its not a hacking project or so, never will be used for spamming or other purposes.

          L Offline
          L Offline
          Lost User
          wrote on last edited by
          #4

          that is probably the best captcha i've ever seen!

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          • L Lost User

            that is probably the best captcha i've ever seen!

            E Offline
            E Offline
            ely_bob
            wrote on last edited by
            #5

            I know right..? the only thing that could be better would be a well know object (instead of the grid) .. but yes brilliant.:thumbsup:

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            • S Sepirothftw

              Hello all, first of all im sorry if its the wrong place for this question. I am trying to decaptcha the following captcha: [IMG]http://i26.tinypic.com/wrazt.png\[/IMG\] what i am trying to do is removing the letters from the rest of the image. I am using Matlab atm but will do it in C# i think. its where i stucked, since all texture on background and letters are same, i can't find a proper way of doing it. Im looking for your suggestions, thanks in advance ps: its not a hacking project or so, never will be used for spamming or other purposes.

              T Offline
              T Offline
              TAREQ F ABUZUHRI
              wrote on last edited by
              #6

              do you found the solution ??? i have same issue http://www.codeproject.com/Questions/127525/image-procesing-get-text-from-image.aspx please help if you can

              Palestine

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