From: Steganalysis of JSteg algorithm using hypothesis testing theory
Inspected images index | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|
No.1 | No.2 | No.3 | No.4 | No.5 | No.6 | No.7 | No.8 | No.9 | No.10 | On average | |
Cover channel selection ratio | 0.23 | 0.17 | 0.56 | 0.61 | 0.21 | 0.03 | 0.87 | 0.41 | 1.23 | 0.33 | 0.63 |
Stego channel selection ratio | 0.23 | 0.17 | 0.56 | 0.62 | 0.21 | 0.04 | 0.88 | 0.42 | 1.22 | 0.34 | 0.64 |
Cover DCT coefs. std | 0.98 | 1.01 | 1.06 | 1.03 | 0.90 | 1.07 | 1.02 | 0.93 | 1.26 | 1.03 | 7.45 |
Stego DCT coefs. std | 0.98 | 1.00 | 1.06 | 1.03 | 0.89 | 1.07 | 1.03 | 0.90 | 1.27 | 1.03 | 7.52 |
Cover JSteg selection ratio | 1.12 | 0.81 | 2.46 | 2.49 | 0.80 | 0.08 | 5.07 | 2.42 | 7.56 | 0.34 | 1.44 |
Stego JSteg selection ratio | 4.48 | 2.85 | 7.63 | 7.60 | 2.27 | 1.07 | 17.1 | 7.92 | 20.5 | 1.04 | 4.95 |
Cover and stego selection similarity | 89.5 | 91.5 | 94.2 | 93.0 | 80.7 | 80.7 | 93.9 | 93.7 | 93.3 | 93.9 | 92.8 |