Rubie's Steganography

This code implements the paper "Digital Image Steganography: An FFT Approach" by Tamer Rabie. It is a way to embedding two images to one carrier image.

Encoding Algorithm

flowchart LR
A(Carrier Image)
B(Split to\nLAB components)
C[FFT]
D[FFT]
E(Add secret magnitudes to high\nfrequencies' magnitude)
F(Add secret magnitudes to high\nfrequencies' magnitude)
I(Secret Image A)
K(Secret Image B)
J(Grayscale Conversion)
L(Grayscale Conversion)
G[iFFT]
H[iFFT]
M(Combine to\nLAB components)
N(Encoded Image)
O(Scale and\nadd offset)
P(Scale and\nadd offset)
A --> B
B --> |Chrom-A| C
B --> |Chrom-B| D
B --> |Luminance| M
C --> E
D --> F
E --> G
F --> H
I --> J --> O --> E
K --> L --> P --> F
G --> |New Chrom-A| M
H --> |New Chrom-B| M
M --> N

Loading

Installation

~$ pip install rubies

Usage

Within the examples below, you will be completely understand all the functionality of rubies package.

Encode Two Images into an Image

# Import Rubie's Encoder.fromrubiesimportEncoder# Create an encoder instance with carrier image.encoder=Encoder("carrier_image.png", secret_size=(500, 500))
# Encode the secret images onto carrier. Return value can be also used.encoded_image=encoder.encode("secret_image_a.png", "secret_image_b.png")
# Save the image.encoder.save("encoded_image.png")

Decode an Image with Unknown Secret Size

# Import Rubie's Decoder.fromrubiesimportAutoDecoder# Create a decoder instance with encoded image and carrier image.decoder=AutoDecoder("encoded_image.png")
# Decode the secret images from the encoded image. Return values can be also used.secret_image_a, secret_image_b=decoder.decode()
# Save the secret images.decoder.save("secret_image_a.png", "secret_image_b.png")

Decode an Image with Known Secret Size

# Import Rubie's Decoder.fromrubiesimportSimpleDecoder# Create a decoder instance with encoded image and carrier image.decoder=SimpleDecoder("encoded_image.png")
# Decode the secret images from the encoded image. Return values can be also used.secret_image_a, secret_image_b=decoder.decode(secret_image_sizes=(500, 500))
# Save the secret images.decoder.save("secret_image_a.png", "secret_image_b.png")