Improved exploiting modification direction method by modulus operation
Journals/International Journals 2010. 1. 6. 12:02The EMD method proposed by Zhang and Wang fully exploited modification directions. Modifications in different directions were used to represent different secret data, where only one secret digit is embedded for each two pixels. To improve an embedding capacity, Chang et al. proposed two-stage EMD method, Lee et al. restricted to 8-ary embedding for the EMD method, and also Lee et al. segmented the pair of cover data into two parts to embed higher secret data. But still have a room for hiding more secret data. This paper proposes an improved method of the EMD method to hide more secret data while maintaining a high PSNR value. The proposed method can embed secret bit on every pixel of cover data.
International Journal of Signal Processing, Image Processing and Pattern, Vol. 2, No.1, March, 2009. pp. 79-88
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