# Fine-Tuning of Pre-Trained Deep Face Sketch Models Using Smart Switching Slime Mold Algorithm
## 4 Experimental Results and Analysis
### Evaluation on Face Sketch Recognition
\begin{table}
\begin{tabular}{c c c c c c c c} \hline \hline \multirow{2}{*}{**Deep-Face Model**} & \multirow{2}{*}{**Fitness**} & \multicolumn{6}{c}{**Algorithm**} \\ \cline{3-8}  & & \(\mathbf{S^{2}SMA}\) & \(\mathbf{SSMA}\) & \(\mathbf{ESMA}\) & \(\mathbf{LSMA}\) & \(\mathbf{AOSMA}\) & \(\mathbf{AOA}\) \\ \hline \multirow{8}{*}{FaceNet} & Best & \(-9.53\times 10^{-2}\) & \(-5.94\times 10^{-2}\) & \(-5.91\times 10^{-2}\) & \(-8.28\times 10^{-2}\) & \(-8.17\times 10^{-2}\) & \(-7.02\times 10^{-2}\) \\ \cline{2-8}  & Median & \(-9.42\times 10^{-2}\) & \(-5.72\times 10^{-2}\) & \(-5.79\times 10^{-2}\) & \(-7.95\times 10^{-2}\) & \(-7.92\times 10^{-2}\) & \(-6.51\times 10^{-2}\) \\ \cline{2-8}  & Worst & \(-9.16\times 10^{-2}\) & \(-5.61\times 10^{-2}\) & \(-5.59\times 10^{-2}\) & \(-7.63\times 10^{-2}\) & \(-7.77\times 10^{-2}\) & \(-6.37\times 10^{-2}\) \\ \cline{2-8}  & Mean & \(\mathbf{-9.41\times 10^{-2}}\) & \(-5.74\times 10^{-2}\) & \(-5.77\times 10^{-2}\) & \(-7.92\times 10^{-2}\) & \(-7.95\times 10^{-2}\) & \(-6.61\times 10^{-2}\) \\ \cline{2-8}  & Std & \(1.04\times 10^{-3}\) & \(1.03\times 10^{-3}\) & \(1.16\times 10^{-3}\) & \(2.24\times 10^{-3}\) & \(1.25\times 10^{-3}\) & \(2.23\times 10^{-3}\) \\ \hline \multirow{8}{*}{ArcFace} & Best & \(-7.95\times 10^{-2}\) & \(-5.16\times 10^{-2}\) & \(-5.27\times 10^{-2}\) & \(-5.92\times 10^{-2}\) & \(-6.08\times 10^{-2}\) & \(-5.62\times 10^{-2}\) \\ \cline{2-8}  & Median & \(-7.79\times 10^{-2}\) & \(-5.09\times 10^{-2}\) & \(-5.14\times 10^{-2}\) & \(-5.60\times 10^{-2}\) & \(-5.77\times 10^{-2}\) & \(-5.38\times 10^{-2}\) \\ \cline{2-8}  & Worst & \(-7.69\times 10^{-2}\) & \(-5.05\times 10^{-2}\) & \(-5.10\times 10^{-2}\) & \(-5.34\times 10^{-2}\) & \(-5.58\times 10^{-2}\) & \(-5.23\times 10^{-2}\) \\ \cline{2-8}  & Mean & \(\mathbf{-7.80\times 10^{-2}}\) & \(-5.10\times 10^{-2}\) & \(-5.17\times 10^{-2}\) & \(-5.60\times 10^{-2}\) & \(-5.78\times 10^{-2}\) & \(-5.41\times 10^{-2}\) \\ \cline{2-8}  & Std & \(8.60\times 10^{-4}\) & \(4.02\times 10^{-4}\) & \(6.74\times 10^{-4}\) & \(2.04\times 10^{-3}\) & \(1.56\times 10^{-3}\) & \(1.14\times 10^{-3}\) \\ \hline \multirow{8}{*}{VGG-Face} & Best & \(-2.57\times 10^{-2}\) & \(-1.65\times 10^{-2}\) & \(-1.64\times 10^{-2}\) & \(-1.72\times 10^{-2}\) & \(-1.75\times 10^{-2}\) & \(-1.73\times 10^{-2}\) \\ \cline{2-8}  & Median & \(-2.54\times 10^{-2}\) & \(-1.60\times 10^{-2}\) & \(-1.61\times 10^{-2}\) & \(-1.67\times 10^{-2}\) & \(-1.69\times 10^{-2}\) & \(-1.70\times 10^{-2}\) \\ \cline{2-8}  & Worst & \(-2.51\times 10^{-2}\) & \(-1.58\times 10^{-2}\) & \(-1.59\times 10^{-2}\) & \(-1.62\times 10^{-2}\) & \(-1.65\times 10^{-2}\) & \(-1.67\times 10^{-2}\) \\ \cline{2-8}  & Mean & \(\mathbf{-2.54\times 10^{-2}}\) & \(-1.61\times 10^{-2}\) & \(-1.61\times 10^{-2}\) & \(-1.67\times 10^{-2}\) & \(-1.69\times 10^{-2}\) & \(-1.70\times 10^{-2}\) \\ \cline{2-8}  & Std & \(2.25\times 10^{-4}\) & \(2.29\times 10^{-4}\) & \(1.88\times 10^{-4}\) & \(2.86\times 10^{-4}\) & \(3.34\times 10^{-4}\) & \(2.05\times 10^{-4}\) \\ \hline \multirow{8}{*}{DeepFace} & Best & \(-1.34\times 10^{-2}\) & \(-6.82\times 10^{-3}\) & \(-6.84\times 10^{-3}\) & \(-7.65\times 10^{-3}\) & \(-7.69\times 10^{-3}\) & \(-7.93\times 10^{-3}\) \\ \cline{2-8}  & Median & \(-1.31\times 10^{-2}\) & \(-6.46\times 10^{-3}\) & \(-6.54\times 10^{-3}\) & \(-7.01\times 10^{-3}\) & \(-7.20\times 10^{-3}\) & \(-7.46\times 10^{-3}\) \\ \cline{2-8}  & Worst & \(-1.28\times 10^{-2}\) & \(-6.21\times 10^{-3}\) & \(-6.30\times 10^{-3}\) & \(-6.50\times 10^{-3}\) & \(-6.79\times 10^{-3}\) & \(-7.33\times 10^{-3}\) \\ \cline{2-8}  & Mean & \(\mathbf{-1.31\times 10^{-2}}\) & \(-6.47\times 10^{-3}\) & \(-6.54\times 10^{-3}\) & \(-7.01\times 10^{-3}\) & \(-7.19\times 10^{-3}\) & \(-7.53\times 10^{-3}\) \\ \cline{2-8}  & Std & \(1.63\times 10^{-4}\) & \(1.72\times 10^{-4}\) & \(1.67\times 10^{-4}\) & \(4.01\times 10^{-4}\) & \(3.10\times 10^{-4}\) & \(1.77\times 10^{-4}\) \\ \hline \multirow{4}{*}{Multiple-model} & Best & \(-2.37\times 10^{-1}\) & \(-1.85\times 10^{-1}\) & \(-1.84\times 10^{-1}\) & \(-2.20\times 10^{-1}\) & \(-2.26\times 10^{-1}\) & \(-1.87\times 10^{-1}\) \\ \cline{2-8}  & Median & \(-2.33\times 10^{Figure 13: The convergence curves for several single-model and multiple-model approaches.