Image hiding using discrete cosine transform

الملخص EN

Steganography is a mean of hiding information within a more obvious form of communication.

It exploits the use of host data to hide a piece of information in such a way that it is imperceptible to human observer.

The major goals of effective Steganography are High Embedding Capacity, Imperceptibility and Robustness.

This paper introduces a scheme for hiding secret images that could be as much as 25% of the host image data.

The proposed algorithm uses orthogonal discrete cosine transform for host image.

A scaling factor (a) in frequency domain controls the quality of the stego images.

Experimented results of secret image recovery after applying JPEG coding to the stego-images are included.