Create stegan.py

stegan.py

@@ -0,0 +1,115 @@
+import base64
+import gradio as gr
+import cv2
+import numpy as np
+import pandas as pd
+from PIL import Image
+import hashlib
+import os
+import uuid as uniq
+from qr import make_qr
+import math
+
+
+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):
+    BGRimage = cv2.imread(image_name)
+    image = cv2.cvtColor(BGRimage, cv2.COLOR_BGR2RGB)   
+    #resultd = hashlib.sha256(txt.encode('utf-8')).hexdigest()
+    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
+    p = decoded_data[:-5].split("#",1)[1].split("#",1)[0]
+    #if p == resultd:
+    this = decoded_data[:-5].split("#",1)[0].split("'",1)[1]
+    #base = bytes(this, 'utf-8')
+    #with open(f"finished_im{uniqnum}.png", "wb") as fh:
+    #    fh.write(base64.decodebytes(bytes(this, 'utf-8')))
+    #fh.close
+    #return f"finished_im{uniqnum}.png"
+    return this
+
+def encode(image_name, secret_data,txt=None):
+    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)
+    #resultp = hashlib.sha256(txt.encode('utf-8')).hexdigest() 
+    secret_data1=secret_data
+    #secret_data1=f'{secret_data}#{resultp}'
+    
+    while True:
+        if len(secret_data1) < (n_bytes):
+            secret_data1 = f'{secret_data1}#'
+        elif len(secret_data1) >= (n_bytes):
+            break    
+    secret_data = secret_data1    
+    if len(secret_data) > n_bytes:
+        return image_name, gr.Markdown.update("""<center><h3>Input image is too large""")
+    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
+def conv_im(qr_link,data):
+    uniqnum = uniq.uuid4()
+
+    byte_size = len(data)
+    print (f'bytes:{byte_size}')
+    data_pixels = byte_size*4
+    print (f'pixels:{data_pixels}')
+    #data_sq=data_pixels/2
+    data_sq = int(math.sqrt(data_pixels))
+    data_pad = data_sq+100
+    print (f'square image:{data_pad}x{data_pad}')
+    
+    qr_im = make_qr(txt=qr_link)
+    img1 = Image.open(qr_im)
+    imgw = img1.size[0] 
+    imgh = img1.size[1]
+    print (f'qr Size:{img1.size}')
+    #img1.thumbnail((imgw*4,imgh*4), Image.Resampling.LANCZOS)
+    img1 = img1.resize((int(data_pad),int(data_pad)), Image.Resampling.LANCZOS)
+    print (img1.size)
+    img1.save(f'tmpim{uniqnum}.png')
+    
+    with open(f'tmpim{uniqnum}.png', "rb") as image_file:
+        encoded_string = base64.b64encode(image_file.read())
+        image_file.close()
+    im_out = encode(f'tmpim{uniqnum}.png',data)
+    return im_out