## 4 Experimental Results and Discussion
### Security Test
\begin{table}
\begin{tabular}{l c c c c c c c c} \hline \hline \multirow{2}{*}{**Attacks**} & \multicolumn{2}{c}{**With ISF**} & \multicolumn{2}{c}{**With GA**} & \multicolumn{2}{c}{**With ABC**} & \multicolumn{2}{c}{**With FO**} \\  & **(Alpha = 1.0341)** & \multicolumn{2}{c}{**(Alpha = 9.18619)**} & \multicolumn{2}{c}{**(Alpha = 4.2647)**} & \multicolumn{2}{c}{**(Alpha = 4.4752)**} \\ \cline{2-9}  & **NC** & **BER** & **NC** & **BER** & **NC** & **BER** & **NC** & **BER** \\ \hline Original & 1 & 0.0004 & 1 & 0 & 1 & 0 & 1 & 0 \\ Salt and Pepper (0.002) & 0.6954 & 0.5710 & **0.8592** & 0.5610 & 0.7701 & 0.5706 & 0.6859 & 0.5708 \\ Gaussian Noise (0.0002) & 0.9472 & 0.5710 & **0.9671** & 0.5551 & 0.9601 & 0.5640 & 0.9538 & 0.5701 \\ Speckle Noise (0.0002) & 0.9426 & 0.5710 & **0.9676** & 05624 & 0.9602 & 0.5668 & 0.9539 & 0.5702 \\ Poisson Noise & 0.9460 & 0.5710 & **0.9679** & 0.5590 & 0.9599 & 0.5623 & 0.9556 & 0.5689 \\ Cropping (25 \% ) & 0.9378 & 0.5102 & **0.9566** & 0.4956 & 0.9500 & 0.5083 & 0.9439 & 0.4934 \\ Rotate \_45 (clockwise) & 0.9703 & 0.0332 & **0.9958** & 0.0012 & 0.9897 & 0.0146 & 0.9909 & 0.0104 \\ Rotate \_10 (clockwise) & 0.9993 & 0.0031 & **0.9997** & 0.0004 & 0.9994 & 0.0007 & 0.9994 & 0.0004 \\ Translate (24.3, 10.1) & 0.9905 & 0.0078 & **0.9990** & 0.0007 & 0.9983 & 0.0012 & 0.9982 & 0.0012 \\ Resize (256) & 0.9410 & 0.0078 & **0.9725** & 0.0007 & 0.9594 & 0.0012 & 0.9542 & 0.0010 \\ Resize (320) & 0.9835 & 0.0400 & **0.9950** & 0.0048 & 0.9905 & 0.0266 & 0.9910 & 0.0263 \\ Jpeg Compression (60\%) & 0.9880 & 0.0183 & **0.9989** & 0.0004 & 0.9961 & 0.0065 & 0.9957 & 0.0041 \\ Sharpening & 0.9973 & 0.1269 & **0.9991** & 0.1054 & 0.9987 & 0.1293 & 0.9990 & 0.1396 \\ Gaussian Filter (3 by 3) & 1 & 0.0004 & 1 & 0 & 1 & 0.0004 & 1 & 0 \\ Median Filter (3 by 3) & 0.9952 & 0.0017 & **0.9976** & 0.0007 & 0.9973 & 0.0004 & 0.9970 & 0.0003 \\ Average Filter (3 by 3) & 0.9608 & 0.3940 & **0.9853** & 0.4416 & 0.9764 & 0.4118 & 0.9725 & 0.3950 \\ Average Filter (5 by 5) & 0.8555 & 0.4206 & 0.9119 & 0.3798 & 0.9027 & 0.3999 & **0.9922** & 0.0009 \\ Weiner Filter (3 by 3) & 0.9745 & 0.0146 & **0.9986** & 0.0004 & 0.9966 & 0.0034 & 0.9783 & 0.0144 \\ Butter worth Filter & 0.9602 & 0.5710 & **0.9895** & 0.4523 & 0.9854 & 0.4610 & 0.9876 & 0.4598 \\ (Threshold = 20, Grade = 1) & 0.9983 & 0.0021 & **0.9993** & 0.0004 & 0.9990 & 0.0012 & 0.9992 & 0.0009 \\ Gamma Correction (0.3) & 0.9983 & 0.0021 & **0.9994** & 0.0008 & 0.9991 & 0.0008 & 0.9990 & 0.0012 \\ Shear (x = 1, y = 0.2) & 0.9972 & 0.0009 & **0.9983** & 0.0004 & 0.9981 & 0.0004 & 0.9980 & 0.0004 \\ \hline \hline \end{tabular}
\end{table} 
Table 5: NC, BER with adaptive ISF (alpha), GA, ABC and FO under common attacks for Lena Image. Figure 12: Attacked watermarked images and corresponding extracted watermark images with NC and BER values under different attacks. Figure 13: Attacked watermarked images and corresponding extracted watermark images with NC and BER values under different attacks. \begin{table}
\begin{tabular}{l c c c c c c} \hline \hline \multirow{2}{*}{**Test Images**} & \multicolumn{3}{c}{**Correlation of Original and Encrypted Images**} & \multicolumn{3}{c}{**Correlation of Original and Decrypted Images**} \\ \cline{2-6}
**(Binary)** & **Horizontal** & **Vertical** & **Diagonal** & **Horizontal** & **Vertical** & **Diagonal** \\ \hline Cameraman & 0.1185 & 0.1263 & 0.0721 & 1 & 1 & 1 \\ Trishool & 0.1238 & 0.1628 & 0.1828 & 1 & 1 & 1 \\ Koala & 0.1472 & 0.1577 & 0.0165 & 1 & 1 & 1 \\ Lena & 0.1294 & 0.1376 & 0.0938 & 1 & 1 & 1 \\ Penguins & 0.1435 & 0.1237 & 0.1171 & 1 & 1 & 1 \\ \hline \hline \end{tabular}
\end{table} 
Table 6: CC between original, encrypted images and original, decrypted images. Figure 14: Original, Encrypted and Decrypted watermark images.