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message_encoder.py

+from PIL import Image
+import numpy as np
+
+secret = "Hello, World"
+bin_secret_list = []
+
+# convert secret string to byte string
+for letter in secret:
+    ASCII = ord(letter)
+    bin_secret_list.append(format(ASCII, '08b'))
+bin_secret = ''.join(bin_secret_list)
+bin_secret += "00000000"
+
+image = Image.open('beemovie.png')
+img = np.array(image)
+
+# encode secret byte string in the red color of the image
+i = 0
+for row in img:
+    for col in row:
+        if i < len(bin_secret):
+            R = col[0]
+            col[0] = int(format(R, '08b')[:-1] + bin_secret[i], 2)
+            i += 1
+
+save_image = Image.fromarray(img)
+save_image.save('encoded_beemovie.png')
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