On this page, you can download a MATLAB implementation of the Perturbed Quantization (PQ) steganography. It includes both original PQ [1] and its modified versions PQt and PQe as described in [2]. Detailed information about the installation and the usage can be found in the enclosed Readme file.
This program is available for public use. Please, do not forget to give us credit by citing either this webpage or the appropriate publication.
Thank you.
[1] J. Fridrich, M. Goljan, and D. Soukal, Perturbed quantization steganography. ACM Multimedia System Journal, 11(2):98–107, 2005. [ paper ], [ bib ]
[2] J. Fridrich, T. Pevny, and J. Kodovsky, Statistically undetectable JPEG steganography: Dead ends, challenges, and opportunities. Proceedings of the 9th ACM Multimedia & Security Workshop, pages 3-14, Dallas, TX, September 20-21, 2007. [ paper ], [ bib ]