mirror of
https://github.com/cedricbonhomme/Stegano.git
synced 2025-05-12 17:18:30 +02:00
50 lines
No EOL
1.6 KiB
Python
50 lines
No EOL
1.6 KiB
Python
#! /usr/local/bin/python
|
|
#-*- coding: utf-8 -*-
|
|
|
|
__author__ = "Cedric Bonhomme"
|
|
__version__ = "$Revision: 0.1 $"
|
|
__date__ = "$Date: 2010/10/01 $"
|
|
|
|
from PIL import Image
|
|
|
|
def steganalyse(img):
|
|
"""
|
|
Find a message in an image
|
|
(with the LSB technique).
|
|
"""
|
|
encoded = img.copy()
|
|
width, height = img.size
|
|
bits = ""
|
|
for row in range(height):
|
|
for col in range(width):
|
|
r, g, b = img.getpixel((col, row))
|
|
if r % 2 == 0:
|
|
r = 0
|
|
else:
|
|
r = 255
|
|
if g % 2 == 0:
|
|
g = 0
|
|
else:
|
|
g = 255
|
|
if b % 2 == 0:
|
|
b = 0
|
|
else:
|
|
b = 255
|
|
encoded.putpixel((col, row), (r, g , b))
|
|
return encoded
|
|
|
|
if __name__ == '__main__':
|
|
# Point of entry in execution mode
|
|
original_image_file = "./pictures/2010-08-04T15:42:06.png"
|
|
encoded_image_file = "./pictures/2010-08-04T15:42:06_enc.png"
|
|
original_image_file_steganalysed = "./pictures/2010-08-04T15:42:06_steganalysed.png"
|
|
encoded_image_file_steganalysed = "./pictures/2010-08-04T15:42:06_enc_steganalysed.png"
|
|
|
|
img_original_image_file = Image.open(original_image_file)
|
|
img_encoded_image_file = Image.open(encoded_image_file)
|
|
|
|
img_original_image_steganalysde = steganalyse(img_original_image_file)
|
|
img_encoded_image_steganalysed = steganalyse(img_encoded_image_file)
|
|
|
|
img_original_image_steganalysde.save(original_image_file_steganalysed)
|
|
img_encoded_image_steganalysed.save(encoded_image_file_steganalysed) |