Estimation of primary quantization matrix for steganalysis of double-compressed JPEG images

Tomáš Pevný; Jessica Fridrich

doi:10.1117/12.759155

18 March 2008 Estimation of primary quantization matrix for steganalysis of double-compressed JPEG images

Tomáš Pevný, Jessica Fridrich

Proceedings Volume 6819, Security, Forensics, Steganography, and Watermarking of Multimedia Contents X; 681911 (2008) https://doi.org/10.1117/12.759155
Event: Electronic Imaging, 2008, San Jose, California, United States

Abstract

A JPEG image is double-compressed if it underwent JPEG compression twice, each time with a different quantization matrix but with the same 8 × 8 grid. Some popular steganographic algorithms (Jsteg, F5, OutGuess) naturally produce such double-compressed stego images. Because double-compression may signficantly change the statistics of DCT coefficients, it negatively influences the accuracy of some steganalysis methods developed under the assumption that the stego image was only single-compressed. This paper presents methods for detection of double-compression in JPEGs and for estimation of the primary quantization matrix, which is lost during recompression. The proposed methods are essential for construction of accurate targeted and blind steganalysis methods for JPEG images, especially those based on calibration. Both methods rely on support vector machine classifiers with feature vectors formed by histograms of low-frequency DCT coefficients.

Citation Download Citation

Tomáš Pevný and Jessica Fridrich "Estimation of primary quantization matrix for steganalysis of double-compressed JPEG images", Proc. SPIE 6819, Security, Forensics, Steganography, and Watermarking of Multimedia Contents X, 681911 (18 March 2008); https://doi.org/10.1117/12.759155

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available