An Agent based Image Steganography using Information Theoretic ...

MASAUM Journal of Computing, Volume 1 Issue 2, September 2009 263
- The goal of steganography is to avoid attacker from
discovering the secret images embedded in the
cover image. To improve security level we must
obtain acceptable STEGO image quality. Overall,
the proposed system matches the requirements to
obtain acceptable STEGO image.
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TABLE 1. THE OBJECTIVE MEASURES FOR S1.BMP &
C1.BMP CHOSEN BY STEGANORGRAPHY AGENT
ACCORDING TO IMAGE FEATURE.
Block size Quantize value R PSNR(db) Correlation
2 0.1 30.5913 0.998366
4 0.1 25.1837 0.994315
8 0.1 22.2076 0.988698
TABLE 2. C1.BMP FEATURES
Mean 111.5858
Entropy 7.763618
Energy 5.252129e-
003
Variance 4918.591
Contrast 70.13267
Secret image ( S1.bmp) Cover image (C1.bmp )
STEGO Image
Fig. (3) The Secret image (s1), the cover image C1,
and the resulted stego image used in example.
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