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Community => Random => Topic started by: Will on May 04, 2012, 12:02:43 am

Title: OCR with a really tricky captcha..
Post by: Will on May 04, 2012, 12:02:43 am

Struggling with  http://barafranca.nl/im-no-cheater/ (http://barafranca.nl/im-no-cheater/" onclick="window.open(this.href);return false;) (Press refresh for diff catpcha)

Working with imagemagick and managed to find a good library of useful functions.
Got the image camera perspective working mostly:

(http://i45.tinypic.com/r8iivr.png)

Now Gunna try finding the standard diviation of the area within each square and filter out everything except the top 5% and bottom 5%. Hopefully this will leave an outline of the characters within the captcha.

If this doesnt work i figured Hough transformation and flood fill algorithms would be the obvious next things to look into.
Any ideas? (php only)

Title: Re: OCR with a really tricky captcha..
Post by: Steff on May 04, 2012, 06:14:33 am

What hase his to do with wow modding?

Title: Re: OCR with a really tricky captcha..
Post by: schlumpf on May 04, 2012, 09:17:49 am

Quote from: "Steff"

What hase his to do with wow modding?

Nothing. That's why it is in the random category.

Title: Re: OCR with a really tricky captcha..
Post by: Will on May 04, 2012, 11:27:56 am

There aren't many forums where the community are willing to share ideas for stuff like this. It's a long shot posting here, but if it isn't appropriate, i'll take it down.

Anyway, nobody has any ideas how to tackle it? :S

Title: Re: OCR with a really tricky captcha..
Post by: Steff on May 04, 2012, 12:13:59 pm

As we are no hacker Forum but a modder forum I dont think so.