libtholoura is a text-image distortion library,
which is useful for sites that want to ensure that
a human (and not a bot) is viewing pages. It is
optimized to produce images of strings distorted
in a way that makes it impossible for an OCR to
read, but humans can. The library takes a string
(preferably ASCII) string and is able to
dynamically produce PNG indexed images. The
distortion filters are external plugins.
