Encode string as image & vice-versa

How it works:

• Each character in the file can be represented as a numeric value from 0 to 255
  • because each byte can be numerically represented using its Decimal ASCII code
• Creates a numpy array from each character's numeric value
• Each value can be taken as a rbg value since the values range from 0 to 255
• Reshape the array as a 3-dimensional array of shape: h * w * 3
  • h: height of the output image
  • w: width of the output image
  • 3: for R, G, & B
• This array can now be converted to image

Example:

If we have a text file with content:

Hello I am just a string! Nothing fancy!!!

This will be encoded into image as such:

since the text content is very less, the resulting image size is very very small(8 * 2 in this case)

You can also see the sample.txt & its encoded file sample.png in the directory

How to use:

• Clone the repo

• Install requirements with pip install -r requirements.txt

• Encoding

  • Note: Make sure you don't have too little string data
  • Create a .txt file with the content that you want to encode as image
  • Run python encode.py my-text.txt

• After completion you should see a new image on current directory as my-text.png

• Decoding:

  • Make sure you have an encoded image
  • Run python decode.py my-text.png
  • After completion you should see a new text file with decoded data as decoded-my-text.txt