How to crack the limit of picture verification code

Just like the Windows watchword, you also have to input the picture verification code before you login into BBS, the controversy is, when you forgot Windows secret parole, you have to find a rule for Windows password recovery, but you won't never forgot the picture verification code taken in the character of you can get it just at that weight, if you can't see it perspicuous, you can change it for a recent one. now, you must feel to a high degree curious why you have to commence upon a picture verification before you login to BBS. Some concern BBS take some measures to preclude malicious register, such they set a restraint of the time you post another article, limit to the same IP pay court to, or the content can't exist repeat, an d so on, but that they are not the focus today. As the BBS is using a general posting form, the only difficulty in opposition to you to break through is the authentication code.

The picture verification code is used to debar hacker trying to submit constantly through specific procedure to brute force a marked registered user or prevent the sort article post for many times at the time forum. They are the characters which is generated randomly to hinder the computer from identifying directly. This picture verification code can be divided into those categories: digital, individual, symbol and any other version, frequent verification code belongs to digital, except there are also some black and clean color and noise points which would propagate in some pictures. So what can you identify? The traditional verification digest identification way is very simple, taken in the character of the location of the number is fixed, in such a manner we just need to extract reaped ground digital picture, and then get each special digital unique pixel position the floor, and then get the characteristic extracted code to remove noise point, then you can determine the corresponding number.

Generally talk, the whole process can be divided into these steps below:
First of all, analysis the attestation code, make sure the prospect complexion.
Secondly, put the verification code width/verification code number words, such of the same kind with A verification code's width subsequent to download is 60, have 4 Numbers, in consequence 60/4 = 15, then save each word, it will be easy allowing that only digital preservation 0-9 reckon in place figure files, but it seems a petty complex if English letters, 0-9, A-Z to preserve in place diagram, bitmap foreground are unvaried, maintain the same kind of dye.
Thirdly, do the comparison, if the verification code is a little white, step 2save the same thesis, then increase frequency of 1.
Finally, the highest common occurrence is the verification code.

In actuality, the method above is not excepting that for the verification code identification, it furthermore can be used in our positive life, for example, the script recognition. If you forgot the Windows Vista countersign, how to bypass Windows Vista countersign is a question for you, if you can't find an ready way to crack the password you will be locked out of your computer. however, if you get this way to cleave the picture verification code, you won't have existence refused by any BBS.