[magick-users] Generate Yahoo's Captcha like graphic?

[Gabe Schaffer]

On 1/1/07, Anthony Thyssen <anthony at griffith.edu.au> wrote:
...
> Note that as a catchpa it is reasonable. But not good enough.  Your
> catcha generator needs to be more sever, and may need to process
> individual letters seperatally.  It also needs multiple styles of
> catchpa so a 'decoder' has to deal with multiple situations not just
> one.

This may not be readily obvious, but you want to randomize the
parameters to the various image effects. Not only that, you want to
make sure you give it ranges that give perturbed output but is still
legible.

For example, you want a swirl parameter greater than zero, but less
than something that makes the text illegible in combination with the
other effects.

GNS