Steganography with Least Histogram Abnormality - Computer Network Security - page 406

resist this type of attacks, a more balanced scheme is introduced in which both F 1 and
F − 1 are used to preserve the image histogram so that some abnormal features are ef-
fectively avoided. Although modifications are no longer confined to the least signifi-
cant bit plane, the new method does not introduce any additional visual distortion to the
cover image. Extraction of the embedded data can still be accomplished by simply
extracting the LSBs of the stego-image. The proposed approach is also applicable to the
LSB modification of transform domain coefficients, and a detectable signature of
histogram shrinkage introduced by techniques such as F5 is avoided.

Acknowledgments

This work was supported by the National Natural Science Foundation of China (No.
60072030) and Key Disciplinary Development Program of Shanghai (2001-44).

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