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Application of QIM with dead zone for histogram preserving JPEG steganography
Noda, H.; Niimi, M.; Kawaguchi, E.;
Image Processing, 2005. ICIP 2005. IEEE International Conference on
Volume 2,
11-14 Sept. 2005
Page(s):II
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1082-5
Abstract:
This paper presents two histogram preserving JPEG steganographic methods aiming at secure JPEG steganography against histogram-based attacks. The first one is a histogram quasi-preserving method, which uses quantization index modulation (QIM) at quantization step of DCT coefficients. Since a straightforward application of QIM causes a significant histogram change, a device is introduced in order not to change the after-embedding histogram excessively. The second one is a histogram preserving method based on histogram matching using two quantizers with a dead zone. In comparison with F5 as a representative JPEG steganography, the two methods show high performance with regard to embedding rate, PSNR of stego image, and particularly histogram preservation.
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