Journal of Applied Sciences ›› 2015, Vol. 33 ›› Issue (3): 290-298.doi: 10.3969/j.issn.0255-8297.2015.03.007

• Signal and Information Processing • Previous Articles     Next Articles

Adaptive JPEG Steganography Based on New Distortion Cost Function

XU Miao1, CHENG Hang1,2, YU Jiang1, ZHANG Xin-peng1   

  1. 1. School of Communication and Information Engineering, Shanghai University,
    Shanghai 200444, China
    2. College of Mathematics and Computer Science, Fuzhou University,
    Fuzhou 350108, China
  • Received:2014-12-03 Revised:2014-12-16 Online:2015-05-30 Published:2014-12-16

Abstract: To improve security of steganography, this paper proposes an adaptive steganographic
scheme for JPEG images based on a new distortion cost function. As texture areas
in a cover image are more suitable for information embedding, the sum of absolute values
of all non-zero quantized DCT coefficients in a DCT block is used to measure texture of
the block. Combining the previous uniform embedding scheme, a new distortion cost function
is defined. With syndrome trellis codes, embedding modification spreads uniformly
over DCT coefficients of all possible magnitudes, embedding secret data adaptively into
the texture areas in the cover. Experimental results show that the proposed scheme out
performs the prior arts in terms of security with the same low payload.

Key words:  distortion cost function, quantized DCT coefficient, syndrome trellis codes, steganography

CLC Number: