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.
XU Miao1, CHENG Hang1,2, YU Jiang1, ZHANG Xin-peng1
. Adaptive JPEG Steganography Based on New Distortion Cost Function[J]. Journal of Applied Sciences, 2015
, 33(3)
: 290
-298
.
DOI: 10.3969/j.issn.0255-8297.2015.03.007
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