LSB Image Steganography Using Python

Overview

Understanding-Steganography-With-Python

LSB Image Steganography Using Python

📗 Description:

💣 WHAT IS STEGANOGRAPHY?

Steganography is the science that involves communicating secret data in an appropriate multimedia carrier, e.g., image, audio, and video files. It comes under the assumption that if the feature is visible, the point of attack is evident, thus the goal here is always to conceal the very existence of the embedded data.

💣 WHAT IS LSB IMAGE STEGANOGRAPHY?

LSB Steganography is an image steganography technique in which messages are hidden inside an image by replacing each pixel’s least significant bit with the bits of the message to be hidden.

🏹 Encode Part:

1.Step:

Firstly, we write the code to convert the source image into a NumPy array of pixels and store the size of the image. if image mode equal RGB n value will be 3 or if image mode RGBA n value equal 4 or is not equal any mode n value will be zero. Calculate Total pixel of image.

def encode(src, message, dest):

img = Image.open(src, 'r')
width, height = img.size
array = np.array(list(img.getdata()))

if img.mode == 'RGB':
    n = 3
elif img.mode == 'RGBA':
    n = 4
else:
    n =0
total_pixels = array.size//n

2.Step:

Secondly, we add a delimiter (“$t3g0") at the end of the secret message, so that when the program decodes, it knows when to stop.

 message += "$t3g0"
 b_message = ''.join([format(ord(i), "08b") for i in message])
 req_pixels = len(b_message)

3.Step:

Thirdly, we make a check if the total pixels available is sufficient for the secret message or not.

 if req_pixels > total_pixels:
print("ERROR: Need larger file size")

else:
   index=0
   for p in range(total_pixels):
      for q in range(0, 3):
          if index < req_pixels:
              array[p][q] = int(bin(array[p][q])[2:9] + b_message[index], 2)
              index += 1

4.Step:

Finally, we have the updated pixels array and we can use this to create and save it as the destination output image.

                    array=array.reshape(height, width, n)
                    enc_img = Image.fromarray(array.astype('uint8'), img.mode)
                    enc_img.save(dest)
                    print("Image Encoded Successfully")

🏹 Decode Part:

1.Step: Firstly, we repeat a similar procedure of saving the pixels of the source image as an array, figuring out the mode, and calculating the total pixels.

def Decode(src):

img = Image.open(src, 'r')
array = np.array(list(img.getdata()))

if img.mode == 'RGB':
    n = 3
elif img.mode == 'RGBA':
    n = 4

total_pixels = array.size//n

2.Step:

Secondly, we need to extract the least significant bits from each of the pixels starting from the top-left of the image and store it in groups of 8.

               hidden_bits = ""
              for p in range(total_pixels):
                    for q in range(0, 3):
                        hidden_bits += (bin(array[p][q])[2:][-1])

               hidden_bits = [hidden_bits[i:i+8] for i in range(0, len(hidden_bits), 8)]

                message = ""
                for i in range(len(hidden_bits)):
                      if message[-5:] == "$t3g0":
                          break
                       else:
                          message += chr(int(hidden_bits[i], 2))

Last Step:

Finally, we do a check if the delimiter was found or not. If not, that means there was no hidden message in the image.

🥇 Congrats!! Let's call the function:

            encode("TARGET_IMAGE_PATH","YOUR_MESSAGE","DESTINATION_IMAGE_PATH")
            decode("DESTINATION_IMAGE_PATH")
Owner
Mahmut Can Gönül
Software Engineer
Mahmut Can Gönül
Convert a DOS Punk image to text

DOS Punk Text Inspired by MAX CAPACITY's DOS Punks & the amazing DOS Punk community. DOS Punk Text is a Python 3 script that renders a DOS Punk image

4 Jan 13, 2022
:rocket: A minimalist comic reader

Pynocchio A minimalist comic reader Features | Installation | Contributing | Credits This screenshots contains a page of the webcomic Pepper&Carrot by

Michell Stuttgart 73 Aug 02, 2022
Image Compression GUI APP Python: PyQt5

Image Compression GUI APP Image Compression GUI APP Python: PyQt5 Use : f5 or debug or simply run it on your ids(vscode , pycham, anaconda etc.) socia

Sourabh Dhalia 1 May 21, 2022
A GUI-based (PyQt5) tool used to design 2D linkage mechanism.

Pyslvs-UI A GUI-based (PyQt5) tool used to design 2D linkage mechanism. Planar Linkages Simulation Python-Solvespace: Kernel from Solvespace with Cyth

Yuan Chang 141 Dec 13, 2022
Create a static HTML/CSS image gallery from a bunch of images.

gallerize Create a static HTML/CSS image gallery from a bunch of images.

Jochen Kupperschmidt 19 Aug 21, 2022
A simple plugin to view APR images in napari

napari-apr-viewer A simple plugin to view APR images in napari This napari plugin was generated with Cookiecutter using @napari's cookiecutter-napari-

5 Jan 24, 2022
Image Reading, Metadata Conversion, and Image Writing for Microscopy Images in Python

AICSImageIO Image Reading, Metadata Conversion, and Image Writing for Microscopy Images in Pure Python Features Supports reading metadata and imaging

Allen Institute for Cell Science - Modeling 137 Dec 14, 2022
Extracts dominating colors from an image and presents them as a palette.

ColorPalette A simple web app to extract dominant colors from an image. Demo Live View it live at : https://colorpalettedemo.herokuapp.com/ You can de

Mayank Nader 214 Dec 29, 2022
This projects aim is to simulate flowers(Gerbera Daisy) phyllotaxis.

phyllotaxis This projects aim is to simulate flowers(Gerbera Daisy) phyllotaxis. Take a look at the arrangement of this flower's seeds, this project's

amirsalar 3 Dec 10, 2021
Program for analyzing shadows from Cassini images

Moons: An Analysis Module for Vicar Files General This packages/program was created for my bachelor's thesis for the Astronomy department at Universit

Joni 1 Jul 16, 2021
SGTL - Spectral Graph Theory Library

SGTL - Spectral Graph Theory Library SGTL is a python library of spectral graph theory methods. The library is still very new and so there are many fe

Peter Macgregor 6 Oct 01, 2022
HTML2Image is a lightweight Python package that acts as a wrapper around the headless mode of existing web browsers to generate images from URLs and from HTML+CSS strings or files.

A package acting as a wrapper around the headless mode of existing web browsers to generate images from URLs and from HTML+CSS strings or files.

176 Jan 01, 2023
Convert any image into greyscale ASCII art.

Image-to-ASCII Convert any image into greyscale ASCII art.

Ben Smith 12 Jan 15, 2022
A quick and dirty QT Statusbar implementation for grabbing GIFs from Tenor, since there is no offical or unofficial one I found. This was intended for use under Linux, however it was also functional enough on MacOS.

Statusbar-TenorGIF App for Linux A quick and dirty QT Statusbar implementation for grabbing GIFs from Tenor, since there is no offical one and I didnt

Luigi DaVinci 1 Nov 01, 2021
An python script to convert images to upscaled versions made out of one-colour emojis.

ABOUT This is an python script to convert png, jpg and gif(output isnt animated :( ) images to scaled versions made out of one-colour emojis. Please n

0 Oct 19, 2022
A sketch like(?) effect for images

lineArt A sketch like(?) effect for images How to run main.py [filename] [option {1,2}] option 1 retains colour option 2 gives gray image #results ori

1 Oct 28, 2021
A 3D structural engineering finite element library for Python.

An easy to use elastic 3D structural engineering finite element analysis library for Python.

Craig 220 Dec 27, 2022
The following program is used to swap the faces from two images.

Face-Swapping The following program is used to swap the faces from two images. In today's world deep fake technology has become really popular . As a

1 Jan 19, 2022
Script For Importing Image sequences into scrap mechanic via blueprints

To use dowload and extract "video makes.zip" Python has to be installed https://www.python.org/ (may not work on version lower than 3.9) Has to be run

2 Oct 30, 2021
Detecting haze image with hazer.

hazer-py Detecting haze image with hazer. What is hazer Hazer is a lib for getting "haze degree". This repository is python version of hazer: https://

Joey777210 2 Dec 27, 2021