DCT based Robust Steganographic Scheme to Hide a Secret Image
The steganography research has grown rapidly since last decade. This technique has been used to hide different types of information, such as medical, personal and business information and also in some cases it was used in criminal act. This paper presents a robust steganographic scheme focused on the embedding of a secret image into a cover image in the DCT domain using quantization based embedding algorithm. The experimental results show the robustness of the proposed scheme against the JPEG compression and noise contamination, while keeping an imperceptibility of hidden data. The proposed scheme also is robust to commercial stego analyzers, which cannot detect the presence of the hidden data in the stegoimage generated by the proposed scheme. The better performance of the proposed scheme is shown comparing with a previously reported steganography algorithm with same objective of the proposed one. Key Words: Steganography, DCT, JPEG, Quantization based embedding, payload, robustness