Omnibus commited on
Commit
7a5ce4e
1 Parent(s): 117f0b0

Create stegan2.py

Browse files
Files changed (1) hide show
  1. stegan2.py +106 -0
stegan2.py ADDED
@@ -0,0 +1,106 @@
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1
+ import base64
2
+ import cv2
3
+ import numpy as np
4
+ #import pandas as pd
5
+ from PIL import Image
6
+ import os
7
+ import uuid as uniq
8
+ from qr import make_qr
9
+ import math
10
+
11
+
12
+ def to_bin(data):
13
+ """Convert `data` to binary format as string"""
14
+ if isinstance(data, str):
15
+ return ''.join([ format(ord(i), "08b") for i in data ])
16
+ elif isinstance(data, bytes):
17
+ return ''.join([ format(i, "08b") for i in data ])
18
+ elif isinstance(data, np.ndarray):
19
+ return [ format(i, "08b") for i in data ]
20
+ elif isinstance(data, int) or isinstance(data, np.uint8):
21
+ return format(data, "08b")
22
+ else:
23
+ raise TypeError("Type not supported.")
24
+ def decode(image_name,txt=None):
25
+ BGRimage = cv2.imread(image_name)
26
+ image = cv2.cvtColor(BGRimage, cv2.COLOR_BGR2RGB)
27
+ binary_data = ""
28
+ for row in image:
29
+ for pixel in row:
30
+ r, g, b = to_bin(pixel)
31
+ binary_data += r[-1]
32
+ binary_data += g[-1]
33
+ binary_data += b[-1]
34
+ all_bytes = [ binary_data[i: i+8] for i in range(0, len(binary_data), 8) ]
35
+ decoded_data = ""
36
+ for byte in all_bytes:
37
+ decoded_data += chr(int(byte, 2))
38
+ if decoded_data[-5:] == "=====":
39
+ break
40
+ this = decoded_data[:-5].split("#####",1)[0]
41
+ this = eval(this)
42
+ enc_in=this
43
+ return this
44
+
45
+ def encode(image_name, secret_data,txt=None):
46
+ BGRimage = cv2.imread(image_name)
47
+ image = cv2.cvtColor(BGRimage, cv2.COLOR_BGR2RGB)
48
+ n_bytes = image.shape[0] * image.shape[1] * 3 // 8
49
+ print("[*] Maximum bytes to encode:", n_bytes)
50
+ secret_data1=secret_data
51
+ #secret_data1=f'{secret_data}#{resultp}'
52
+
53
+ while True:
54
+ if len(secret_data1)+5 < (n_bytes):
55
+ secret_data1 = f'{secret_data1}#####'
56
+ elif len(secret_data1)+5 >= (n_bytes):
57
+ break
58
+ secret_data = secret_data1
59
+ if len(secret_data) > n_bytes:
60
+ return image_name, gr.Markdown.update("""<center><h3>Input image is too large""")
61
+ secret_data += "====="
62
+ data_index = 0
63
+ binary_secret_data = to_bin(secret_data)
64
+ data_len = len(binary_secret_data)
65
+ for row in image:
66
+ for pixel in row:
67
+ r, g, b = to_bin(pixel)
68
+ if data_index < data_len:
69
+ pixel[0] = int(r[:-1] + binary_secret_data[data_index], 2)
70
+ data_index += 1
71
+ if data_index < data_len:
72
+ pixel[1] = int(g[:-1] + binary_secret_data[data_index], 2)
73
+ data_index += 1
74
+ if data_index < data_len:
75
+ pixel[2] = int(b[:-1] + binary_secret_data[data_index], 2)
76
+ data_index += 1
77
+ if data_index >= data_len:
78
+ break
79
+ return image
80
+ def conv_im(qr_link,data):
81
+ uniqnum = uniq.uuid4()
82
+
83
+ byte_size = len(data)
84
+ print (f'bytes:{byte_size}')
85
+ data_pixels = byte_size*4
86
+ print (f'pixels:{data_pixels}')
87
+ #data_sq=data_pixels/2
88
+ data_sq = int(math.sqrt(data_pixels))
89
+ data_pad = data_sq+100
90
+ print (f'square image:{data_pad}x{data_pad}')
91
+
92
+ qr_im = make_qr(txt=qr_link)
93
+ img1 = Image.open(qr_im)
94
+ imgw = img1.size[0]
95
+ imgh = img1.size[1]
96
+ print (f'qr Size:{img1.size}')
97
+ #img1.thumbnail((imgw*4,imgh*4), Image.Resampling.LANCZOS)
98
+ img1 = img1.resize((int(data_pad),int(data_pad)), Image.Resampling.LANCZOS)
99
+ print (img1.size)
100
+ img1.save(f'tmpim{uniqnum}.png')
101
+
102
+ with open(f'tmpim{uniqnum}.png', "rb") as image_file:
103
+ encoded_string = base64.b64encode(image_file.read())
104
+ image_file.close()
105
+ im_out = encode(f'tmpim{uniqnum}.png',data)
106
+ return im_out