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资源说明：A steganography tool for lossless message hiding in images.
Stega
=====
Stega is a simple `steganography`_ tool that allows you to losslessly embed
messages into images. The image that comes back is same as the original.
The only requirement is that you use a lossless image format, so no jpeg
images will work.
This implementation was adapted from a `paper`_ titled "Lossless Data Hiding
in the Spatial Domain for High Quality Images", written by Hong Lin Jin,
Masaaki Fujiyoshi, and Hitoshi Kiya
.. _paper: http://203.64.187.41/htdocs-41/em/771.pdf
.. _steganography: http://en.wikipedia.org/wiki/Steganography
Usage::
image = Image.new('RGB', (111, 111))
msg = "What hath God wrought. "
s = Stega(image)
s.add_message(msg)
im, message = s.extract()
assert message == msg
Run tests::
$ ./runtests
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