Steganography project for Signal Processing class
Two main methods of concealing a secret in a carrier data were implemented:
- image-in-audio
- text-in-image
Image-in-audio is implemented using a basic LSB encoding and it is used to demonstrate the ease of embedding a grayscale image into an audio file, without any perceptible differences when replaying the altered audio track.
Text-in-image is implemented using a slightly modified algorithm presented in a paper (see doc/). This method uses the 2D Discrete Wavelet Transform (DWT) on the Cb channel of a YCbCr image to delimit regions of detail and then embeds the text into those regions that are imperceptible to the human eye.