Research Article
A Secure Steganographic Algorithm Based on Frequency Domain for the Transmission of Hidden Information
Table 2
Values of histogram similarity.
| Keys | Proposed method | Soria method | Velasco method |
| Airplane | 1 | 0.002534 | 0.002496 | 0.002033 | 2 | 0.002377 | 0.002860 | 0.002033 | 3 | 0.002256 | 0.002476 | 0.002033 | 4 | 0.002457 | 0.002557 | 0.002033 | 5 | 0.002444 | 0.002573 | 0.002033 | 6 | 0.002271 | 0.002406 | 0.002033 | 7 | 0.002387 | 0.002439 | 0.002033 |
| City | 1 | 0.000965 | 0.001002 | 0.000954 | 2 | 0.000901 | 0.001031 | 0.000954 | 3 | 0.000968 | 0.000987 | 0.000954 | 4 | 0.001051 | 0.000951 | 0.000954 | 5 | 0.000989 | 0.000947 | 0.000954 | 6 | 0.001067 | 0.001072 | 0.000954 | 7 | 0.001104 | 0.000893 | 0.000954 |
| Leaves | 1 | 0.001501 | 0.001622 | 0.001224 | 2 | 0.001755 | 0.001649 | 0.001224 | 3 | 0.001634 | 0.001568 | 0.001224 | 4 | 0.001648 | 0.001475 | 0.001224 | 5 | 0.001680 | 0.001652 | 0.001224 | 6 | 0.001788 | 0.001631 | 0.001224 | 7 | 0.001643 | 0.001469 | 0.001224 |
| Lenna | 1 | 0.002055 | 0.002050 | 0.001408 | 2 | 0.002204 | 0.002098 | 0.001408 | 3 | 0.002075 | 0.001983 | 0.001408 | 4 | 0.002003 | 0.002027 | 0.001408 | 5 | 0.001925 | 0.001944 | 0.001408 | 6 | 0.002152 | 0.001948 | 0.001408 | 7 | 0.002068 | 0.001855 | 0.001408 |
| Peppers | 1 | 0.004432 | 0.004207 | 0.002718 | 2 | 0.004313 | 0.004803 | 0.002718 | 3 | 0.004288 | 0.004031 | 0.002718 | 4 | 0.004490 | 0.004672 | 0.002718 | 5 | 0.004433 | 0.004226 | 0.002718 | 6 | 0.004416 | 0.004138 | 0.002718 | 7 | 0.004485 | 0.004093 | 0.002718 |
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