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Erschienen in:
2006 | OriginalPaper | Buchkapitel
Multiple Messages Embedding Using DCT-Based Mod4 Steganographic Method
verfasst von : KokSheik Wong, Kiyoshi Tanaka, Xiaojun Qi
Erschienen in: Multimedia Content Representation, Classification and Security
Verlag: Springer Berlin Heidelberg
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This paper proposes an extension of DCT-based Mod4 steganographic method to realize
m
ultiple
m
essages
e
mbedding (MME). To implement MME, we utilize the structural feature of Mod4 that uses vGQC (
v
alid
g
roup of 2 ×2 adjacent quantized DCT
c
oefficients) as message carrier. vGQC’s can be partitioned into several disjoint sets by differentiating the parameters where each set could serve as an individual secret communication channel. A maximum number of 14 independent messages can be embedded into a cover image without interfering one message and another. We can generate stego images with image quality no worse than conventional Mod4. Results for blind steganalysis are also shown.