image-scramble 1.1.1

Split image into tiles and scramble/unscramble it with seed.

Pycasso

Image obfuscation tool with seed.

Example

Scramble

Using scramble mode on export on this sample image will produce the following output:

Unscramble

To revert the image to its original state, use the same seed and slice_size on unscramble mode:

img = 'examples/en_Pepper-and-Carrot_by-David-Revoy_E05P01_p2_pycasso.png'
slice_size = 30
seed = 'Pycasso'

Credits

• Pycasso is a Python version of webcaetano/image-scramble and webcaetano/shuffle-seed. This also uses a stripped-down port of davidbau/seedrandom. Hence, this module now replicates the same output from the original JS module, in contrast with the first release where the random module from the Python standard library was used to initialize the PRNG.

• Sample image is taken from Pepper & Carrot by David Revoy licensed under CC BY 4.0.

Getting Started

Prerequisites

• Python 3.8+

Setup

• First, you should get a copy of this project in your local machine by either downloading the zip file or cloning the repository. git clone https://github.com/catsital/pycasso.git
• cd into pycasso directory.
• Run python setup.py install to install package.

Install from development

Install directly from the development source with pip by python -m pip install git+https://github.com/catsital/pycasso@develop

Usage

After installing, you can get started by using the command-line utility to scramble or unscramble an image by:

$ pycasso image_input.png scramble

This will produce a scrambled image with seed based on your current system time. Hence, the output will be completely unpredictable and irreversible. Use the options -n for slice_size and -s for seed to fine-tune your desired output, like so:

$ pycasso image_input.png scramble -n 50 -s seed -o image_output.png

To use this in a script, initialize a Canvas and use scramble on export by:

from pycasso import Canvas
img = 'image_input.png'
slice_size = 50
seed = 'seed'
pycasso = Canvas(img, slice_size, seed)
pycasso.export(mode='scramble', path='image_output.png')

This can be also achieved in a one-liner:

Canvas('image_input.png', 50, 'seed').export('scramble', 'image_output.png')

Params

img

• Path to image source

slice_size

• Size of each slice

seed

• Seed to shuffle in same sequence

output

• Output file name and format

Modes

scramble default

• Splits and scrambles image into tiles

unscramble

• Reverts the image to its original form given the same seed

Modes can be used interchangeably and conversely perform their original functions. (i.e. If you use unscramble to scramble an image, it will scramble the image. Consequently you should use scramble to unscramble the image to its original form.)

License

Copyright (c) 2021 Julia Torres
Copyright (c) 2015 Andre Caetano

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.