Fig. 1. Coefficients of DB-8 wavelets. (a) One-dimensional low-pass filter; (b) one-dimensional high-pass filter

Fig. 2. Decomposition of cover image by using WOW algorithm. (a) Cover image; (b) horizontal direction; (c) vertical direction; (d) diagonal direction

Fig. 3. Process of STC

Fig. 4. Decomposition of cover image by using proposed algorithm. (a) Cover image; (b) horizontal direction; (c) vertical direction; (d) diagonal direction

Fig. 5. Comparison of security performance using Daubechies wavelets under different embedding rates. (a) SRM-0.05 bit/pixel; (b) SRM-0.1 bit/pixel; (c) SRM-0.2 bit/pixel; (d) SRM-0.3 bit/pixel; (e) SRM-0.4 bit/pixel; (f) SRM-0.5 bit/pixel; (g) SRMQ1-0.05 bit/pixel; (h) SRMQ1-0.1 bit/pixel; (i) SRMQ1-0.2 bit/pixel; (j) SRMQ1-0.3 bit/pixel; (k) SRMQ1-0.4 bit/pixel; (l) SRMQ1-0.5 bit/pixel

Fig. 6. Security of H?lder norm parameters

Fig. 7. Experimental results of proposed algorithm and other famous steganographic algorithms. (a) SRM features; (b) SRMQ1 features

Table 1. Experimental results of different orders'filter

Table 2. Experimental results under SRM characteristics

Table 3. Experimental results under SRMQ1 characteristics