def unhide(image, length, decode, size, chunksize): ''' Recovers hidden data in an image. ''' return (decode(unbitchunks(chunk, size, chunksize)) for chunk in islice(chunks(list(bitstream(image.load(), chunksize, image.size)), size//chunksize), 0, length))
def unhide(image, length, decode, size, chunksize):
'''
Recovers hidden data in an image.
'''
return (decode(unbitchunks(chunk, size, chunksize)) for chunk in islice(
chunks(list(bitstream(image.load(), chunksize, image.size)), size //
chunksize), 0, length))
def bitchunkSuite():
'''
Some tests I wrote to visually inspect a few bit-twiddling functions defined in this module.
'''
#
n = 123 # Number to be smeared out
chunksize = 2 # Size of each chunk (in bits)
size = 8 # Size of the number (in bits)
#
# TODO: Clean this up
print(*(('{:>%d}' % chunksize).format(str(n)) for n in range(size//chunksize)))
print(*chunks(('{:0%sb}' % size).format(n), chunksize))
print(*(('{:0%sb}' % chunksize).format(bits) for bits in bitchunks(n, size, chunksize)))
for n, c in enumerate(chain(*(bitchunks(ord(c), size, chunksize) for c in 'Hello World!'))):
print(('{:0%sb}' % chunksize).format(c), end='|' if ((n+1) % (size//chunksize)) is 0 else '')
print()
def bitchunkSuite():
'''
Some tests I wrote to visually inspect a few bit-twiddling functions defined in this module.
'''
#
n = 123 # Number to be smeared out
chunksize = 2 # Size of each chunk (in bits)
size = 8 # Size of the number (in bits)
#
# TODO: Clean this up
print(*(('{:>%d}' % chunksize).format(str(n))
for n in range(size // chunksize)))
print(*chunks(('{:0%sb}' % size).format(n), chunksize))
print(*(('{:0%sb}' % chunksize).format(bits)
for bits in bitchunks(n, size, chunksize)))
for n, c in enumerate(
chain(*(bitchunks(ord(c), size, chunksize)
for c in 'Hello World!'))):
print(('{:0%sb}' % chunksize).format(c),
end='|' if ((n + 1) % (size // chunksize)) is 0 else '')
print()
