Spaces:
Running
Running
File size: 2,530 Bytes
059deb6 df35102 059deb6 |
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 |
def to_bin(data):
"""Convert `data` to binary format as string"""
if isinstance(data, str):
return ''.join([ format(ord(i), "08b") for i in data ])
elif isinstance(data, bytes):
return ''.join([ format(i, "08b") for i in data ])
elif isinstance(data, np.ndarray):
return [ format(i, "08b") for i in data ]
elif isinstance(data, int) or isinstance(data, np.uint8):
return format(data, "08b")
else:
raise TypeError("Type not supported.")
def decode(image_name,txt=None):
msg=""
BGRimage = cv2.imread(image_name)
image = cv2.cvtColor(BGRimage, cv2.COLOR_BGR2RGB)
binary_data = ""
for row in image:
for pixel in row:
r, g, b = to_bin(pixel)
binary_data += r[-1]
binary_data += g[-1]
binary_data += b[-1]
all_bytes = [ binary_data[i: i+8] for i in range(0, len(binary_data), 8) ]
decoded_data = ""
for byte in all_bytes:
decoded_data += chr(int(byte, 2))
if decoded_data[-5:] == "=====":
break
this = decoded_data[:-5].split("#####",1)[0]
this = eval(this)
enc_in=this
return this,msg
def encode(image_name, secret_data,txt=None):
msg=""
BGRimage = cv2.imread(image_name)
image = cv2.cvtColor(BGRimage, cv2.COLOR_BGR2RGB)
n_bytes = image.shape[0] * image.shape[1] * 3 // 8
print("[*] Maximum bytes to encode:", n_bytes)
secret_data1=secret_data
while True:
if len(secret_data1)+5 < (n_bytes):
secret_data1 = f'{secret_data1}#####'
elif len(secret_data1)+5 >= (n_bytes):
break
secret_data = secret_data1
if len(secret_data) > n_bytes:
msg ="Watermark is too large for Image Size"
return image_name,msg
secret_data += "====="
data_index = 0
binary_secret_data = to_bin(secret_data)
data_len = len(binary_secret_data)
for row in image:
for pixel in row:
r, g, b = to_bin(pixel)
if data_index < data_len:
pixel[0] = int(r[:-1] + binary_secret_data[data_index], 2)
data_index += 1
if data_index < data_len:
pixel[1] = int(g[:-1] + binary_secret_data[data_index], 2)
data_index += 1
if data_index < data_len:
pixel[2] = int(b[:-1] + binary_secret_data[data_index], 2)
data_index += 1
if data_index >= data_len:
break
return image,msg |