Loading...

A proper transform for satisfying benford's law and its application to double JPEG image forensics

Taimori, A ; Sharif University of Technology | 2012

444 Viewed
  1. Type of Document: Article
  2. DOI: 10.1109/ISSPIT.2012.6621294
  3. Publisher: 2012
  4. Abstract:
  5. This paper presents a new transform domain to evaluate the goodness of fit of natural image data to the common Benford's Law. The evaluation is made by three statistical fitness criteria including Pearson's chi-square test statistic, normalized cross correlation and a distance measure based on symmetrized Kullback-Leibler divergence. It is shown that the serial combination of variance filtering and block 2-D discrete cosine transform reveals the best goodness of fit for the first significant digit. We also show that the proposed transform domain brings reasonable fit for the second, third and fourth significant digits. As an application, the proposed transform domain is utilized to detect image manipulation by distinguishing single compressed images from doubly compressed ones
  6. Keywords:
  7. Discrete cosine transform ; Image forensics ; Significant digits statistics ; Benford's law ; Double JPEG ; Image forensics ; Significant digits ; Variance filter ; Information technology ; Signal processing ; Statistical tests ; Discrete cosine transforms
  8. Source: 2012 IEEE International Symposium on Signal Processing and Information Technology, ISSPIT 2012, 12 December 2012 through 15 December 2012 ; 2012 , Pages 240-244 ; 9781467356060 (ISBN)
  9. URL: http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=6621294