Spatio-temporal Rich Model Based Video Steganalysis on Cross Sections of Motion Vector Planes

Kasim Tasdemir, Fatih Kurugollu, Sakir Sezer

Research output: Contribution to journalArticle

14 Citations (Scopus)
271 Downloads (Pure)

Abstract

A rich model based motion vector steganalysis benefiting from both temporal and spatial correlations of motion vectors is proposed in this work. The proposed steganalysis method has a substantially superior detection accuracy than the previous methods, even the targeted ones. The improvement in detection accuracy lies in several novel approaches introduced in this work. Firstly, it is shown that there is a strong correlation, not only spatially but also temporally, among neighbouring motion vectors for longer distances. Therefore, temporal motion vector dependency along side the spatial dependency is utilized for rigorous motion vector steganalysis. Secondly, unlike the filters previously used, which were heuristically designed against a specific motion vector steganography, a diverse set of many filters which can capture aberrations introduced by various motion vector steganography methods is used. The variety and also the number of the filter kernels are substantially more than that of used in previous ones. Besides that, filters up to fifth order are employed whereas the previous methods use at most second order filters. As a result of these, the proposed system captures various decorrelations in a wide spatio-temporal range and provides a better cover model. The proposed method is tested against the most prominent motion vector steganalysis and steganography methods. To the best knowledge of the authors, the experiments section has the most comprehensive tests in motion vector steganalysis field including five stego and seven steganalysis methods. Test results show that the proposed method yields around 20% detection accuracy increase in low payloads and 5% in higher payloads.
Original languageEnglish
Number of pages13
JournalIEEE Trans. on Image Processing
Volume25
Issue number7
Early online date11 May 2016
DOIs
Publication statusEarly online date - 11 May 2016

Keywords

  • Steganalysis
  • steganography
  • video
  • motion vector
  • Comparison

ASJC Scopus subject areas

  • Signal Processing

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