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- The (so-called) "Security Images" are so popular. Most internet
- software use these in their registration screens to block robot programs
- (which may register tons of fake member accounts). Security images are
- basically graphical CAPTCHAs (Completely Automated Public Turing Test to
- Tell Computers and Humans Apart). This module gives you a basic
- interface to create such an image. The final output is the actual
- graphic data, the mime type of the graphic and the created random
- string. The module also has some "styles" that are used to create the
- background (or foreground) of the image.
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