def decode_nth_bit(inp, stegobit):
"""Retrieves a text message in a specific colour value bit of an image"""
assert os.path.isfile(inp), '%s is not a file.' % inp
assert 0 <= stegobit <= 7, '%d is an invalid bit value.' % stegobit
img = read_img(inp)
res = decode_msg_from_bit(img, stegobit)
print res
return res
def decode_nth_bit(inp, stegobit):
"""Retrieves a text message in a specific colour value bit of an image"""
assert os.path.isfile(inp), '%s is not a file.' % inp
assert 0 <= stegobit <= 7, '%d is an invalid bit value.' %stegobit
img = read_img(inp)
res = decode_msg_from_bit(img, stegobit)
print res
return res
def encode_nth_bit(inp, out, msg, stegobit):
"""Hides a text message in one bit of each colour value of an image."""
assert os.path.isfile(inp), '%s is not a file.' % inp
assert 0 <= stegobit <= 7, '%d is an invalid bit value.' % stegobit
img = read_img(inp)
#while writing an jpg image, compression destroys the steganographic message
ext = os.path.splitext(out)[1].lower()
assert ext != '.jpeg' and ext != '.jpg', 'jpg/jpeg is currently not a valid extension for output images.'
write_img(out, encode_msg_in_bit(img, msg, stegobit))
def decode_patchwork(inp, key_array_A, key_array_B):
"""Retrieves a text message which is hidden by patchwork steganography"""
assert os.path.isfile(inp), '%s is not a file.' % inp
img = read_img(inp)
key_array_A = json.loads(key_array_A)
key_array_B = json.loads(key_array_B)
res = decode_msg_with_patchwork(img, key_array_A, key_array_B)
print res
return res
def decode_patchwork(inp, key_array_A, key_array_B):
"""Retrieves a text message which is hidden by patchwork steganography"""
assert os.path.isfile(inp), '%s is not a file.' % inp
img = read_img(inp)
key_array_A = json.loads(key_array_A)
key_array_B = json.loads(key_array_B)
res = decode_msg_with_patchwork(img, key_array_A, key_array_B)
print res
return res
def encode_nth_bit(inp, out, msg, stegobit):
"""Hides a text message in one bit of each colour value of an image."""
assert os.path.isfile(inp), '%s is not a file.' % inp
assert 0 <= stegobit <= 7, '%d is an invalid bit value.' %stegobit
img = read_img(inp)
#while writing an jpg image, compression destroys the steganographic message
ext = os.path.splitext(out)[1].lower()
assert ext != '.jpeg' and ext != '.jpg', 'jpg/jpeg is currently not a valid extension for output images.'
write_img(out, encode_msg_in_bit(img, msg, stegobit))
def encode_patchwork(inp, out, msg):
"""Hides a text message in pixels of two key streams."""
assert os.path.isfile(inp), '%s is not a file.' % inp
img = read_img(inp)
A = get_random_pos(len(msg), img)
B = get_random_pos(len(msg), img, A)
print "A: %s" % json.dumps(A)
print "B: %s" % json.dumps(B)
#while writing an jpg image, compression destroys the steganographic message
ext = os.path.splitext(out)[1].lower()
assert ext != '.jpeg' and ext != '.jpg', 'jpg/jpeg is currently not a valid extension for output images.'
save_image(out, encode_msg_with_patchwork(img, msg, A, B))
def encode_patchwork(inp, out, msg):
"""Hides a text message in pixels of two key streams."""
assert os.path.isfile(inp), '%s is not a file.' % inp
img = read_img(inp)
A = get_random_pos(len(msg), img)
B = get_random_pos(len(msg), img, A)
print "A: %s" %json.dumps(A)
print "B: %s" %json.dumps(B)
#while writing an jpg image, compression destroys the steganographic message
ext = os.path.splitext(out)[1].lower()
assert ext != '.jpeg' and ext != '.jpg', 'jpg/jpeg is currently not a valid extension for output images.'
save_image(out, encode_msg_with_patchwork(img, msg, A, B))
def decode_patchwork(inp):
"""Retrieves a text message which is hidden by patchwork steganography"""
assert os.path.isfile(inp), '%s is not a file.' % inp
img = read_img(inp)
#Truyen gia tri toa do x,y cua 2 mang A,B
key_array_A = [[61, 293], [37, 159], [127, 110], [66, 235], [17, 229], [226, 58], [185, 328]]
key_array_B = [[210, 230], [21, 517], [126, 263], [126, 564], [111, 503], [110, 255], [38, 179]]
#key_array_A = json.loads(key_array_A)
#key_array_B = json.loads(key_array_B)
res = decode_msg_with_patchwork(img, key_array_A, key_array_B)
print res
return res
from scipy.misc import imsave as save_image import numpy as np import random def diff_methode(img_array, msg): msg_len = len(msg) x = random.randint(0, img_array.shape[0]) y = random.randint(0, img_array.shape[1]) key_array_A = [] key_array_B = [] while len(key_array_A) < msg_len: rand_pix = img_array[(random.randint(0, img_array.shape[0] - 1), random.randint(0, img_array.shape[1] - 1))] for p in img_array: if rand_pix.all(p) and p not in key_array_A and rand_pix not in key_array_A and rand_pix not in key_array_B: key_array_A.append[rand_pix] key_array_B.append[p] print key_array_A print key_array_B ### TESTING ### path = "C:\\Users\\Public\\Pictures\\Sample Pictures\\Koala.jpg" path2 = "C:\\Users\\Public\\Pictures\\Sample Pictures\\KoalaTESTX.jpg" img = read_img(path) print img msg = "This is a new diff methode for stego" diff_methode(img, msg)
def diff_methode(img_array, msg):
msg_len = len(msg)
x = random.randint(0, img_array.shape[0])
y = random.randint(0, img_array.shape[1])
key_array_A = []
key_array_B = []
while len(key_array_A) < msg_len:
rand_pix = img_array[(random.randint(0, img_array.shape[0] - 1),
random.randint(0, img_array.shape[1] - 1))]
for p in img_array:
if rand_pix.all(
p
) and p not in key_array_A and rand_pix not in key_array_A and rand_pix not in key_array_B:
key_array_A.append[rand_pix]
key_array_B.append[p]
print key_array_A
print key_array_B
### TESTING ###
path = "C:\\Users\\Public\\Pictures\\Sample Pictures\\Koala.jpg"
path2 = "C:\\Users\\Public\\Pictures\\Sample Pictures\\KoalaTESTX.jpg"
img = read_img(path)
print img
msg = "This is a new diff methode for stego"
diff_methode(img, msg)