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