To my knowledge, there is no single IM command to do this. However, 
it can be scripted using a combination of text to image creation 
using one of the functions like annotate on a character by character 
basis, rotating each character image, merging them together with 
+append, then drawing some line or curves through the merged image.

See -annotate, -rotate, -append, -draw on the options page

http://www.imagemagick.org/script/command-line-options.php

and examples at

http://www.imagemagick.org/Usage/
http://www.imagemagick.org/Usage/reference.html





>Hello,
>
>Are there any example command which can generate Yahoo like captcha
>text image, or similar?
>
>E.g.
>
>http://libcaca.zoy.org/browser/pwntcha/testsuite/yahoo/yahoo_053.jpeg
>
>Howard
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