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| This one is written with the current state of captcha-defeating research (as of 2007) in mind. Apart from a mathematical letter distortion algorithm that is more than just rotating the letters, the clutter is designed to make segmentation of the image into separate letter glyphs hard to do automatically. Finally, the images contain the name of the originating website to discourage re-using them on adult sites.
Requirements
PHP GD and truetype library (these are normally installed by webhosting providers. Otherwise look for the package php-gd) You will need to know some PHP in order to adapt your forum or guestbook software. |
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