Title :
Image tamper detection based on the DCT coefficients model
Author :
Jiang Wenfeng ; Zhang Rul ; Liu Jianyi
Author_Institution :
Inf. Security Center, Beijing Univ. of Posts & Telecommun., Beijing, China
Abstract :
The statistical model of the image DCT coefficients will change because of some operations on the image. This paper compares a variety of common functions distribution and the image DCT coefficients statistical model fitting degree, found that the eigenvalue of which the stable distribution fit with the statistical model of DCT coefficients has good regularity, and may reflect changes in the statistical model of DCT coefficients for image tampering operation, so it can become a reference characteristic to identify the image tampering.
Keywords :
discrete cosine transforms; image coding; security of data; DCT coefficient model; eigenvalue; function distribution; image DCT coefficient; image tamper detection; image tampering operation; stable distribution fit; statistical model fitting degree; DCT coefficients; SVM; image tamper detection; symmetric alpha stable distribution model;
Conference_Titel :
Computer Science and Network Technology (ICCSNT), 2012 2nd International Conference on
Conference_Location :
Changchun
Print_ISBN :
978-1-4673-2963-7
DOI :
10.1109/ICCSNT.2012.6526051
