# Face Spoofing Detection with Stacking Ensembles in Work Time Registration System
## Appendix A
\begin{table}
\begin{tabular}{c c c c c c} \hline \hline
**Combination** & **Small** & **Spoofing** & **Large** & **CelebA** & **Rank** \\ \hline C,N,E,V (stacking) & 91.19 \(\pm\) 4.28 & 96.30 \(\pm\) 1.62 & 98.89 \(\pm\) 0.21 & 98.96 \(\pm\) 0.18 & 27 \\ \hline C,N,E (stacking) & 91.18 \(\pm\) 3.95 & 96.35 \(\pm\) 1.69 & 98.89 \(\pm\) 0.22 & 98.94 \(\pm\) 0.17 & 27 \\ \hline S,C,N (stacking) & 90.65 \(\pm\) 2.99 & 95.81 \(\pm\) 1.32 & 98.94 \(\pm\) 0.23 & 99.04 \(\pm\) 0.10 & 29 \\ \hline B,C,N,X (stacking) & 89.75 \(\pm\) 3.80 & 94.43 \(\pm\) 1.97 & 98.96 \(\pm\) 0.16 & 98.98 \(\pm\) 0.10 & 38.25 \\ \hline B,C,N,X,V (stacking) & 89.40 \(\pm\) 4.05 & 94.33 \(\pm\) 2.00 & 98.97 \(\pm\) 0.15 & 98.98 \(\pm\) 0.10 & 40.25 \\ \hline B,S,C,X,E,V (stacking) & 90.02 \(\pm\) 4.15 & 95.97 \(\pm\) 1.74 & 96.53 \(\pm\) 0.41 & 99.03 \(\pm\) 0.12 & 41.25 \\ \hline B,S,N,X,E (stacking) & 91.74 \(\pm\) 3.22 & 95.62 \(\pm\) 1.88 & 98.37 \(\pm\) 0.29 & 97.15 \(\pm\) 0.28 & 41.25 \\ \hline B,S,C,X,E (stacking) & 90.11 \(\pm\) 4.12 & 95.80 \(\pm\) 1.78 & 96.57 \(\pm\) 0.42 & 99.01 \(\pm\) 0.12 & 43.75 \\ \hline B,S,N,X,E,V (stacking) & 91.60 \(\pm\) 3.46 & 95.55 \(\pm\) 2.12 & 98.37 \(\pm\) 0.32 & 97.10 \(\pm\) 0.26 & 43.75 \\ \hline S,N,X,E,V (stacking) & 91.55 \(\pm\) 3.90 & 95.58 \(\pm\) 2.25 & 98.37 \(\pm\) 0.31 & 97.09 \(\pm\) 0.27 & 44 \\ \hline B,S,N,E (stacking) & 92.16 \(\pm\) 3.28 & 95.74 \(\pm\) 2.12 & 98.30 \(\pm\) 0.36 & 96.68 \(\pm\) 0.34 & 44.75 \\ \hline S,N,X,E (stacking) & 91.40 \(\pm\) 3.70 & 95.68 \(\pm\) 1.96 & 98.35 \(\pm\) 0.32 & 97.10 \(\pm\) 0.28 & 45.25 \\ \hline B,S,N,E,V (stacking) & 92.12 \(\pm\) 3.24 & 95.69 \(\pm\) 2.19 & 98.31 \(\pm\) 0.34 & 96.63 \(\pm\) 0.35 & 45.75 \\ \hline C,N,X (stacking) & 87.78 \(\pm\) 4.20 & 94.43 \(\pm\) 2.01 & 98.96 \(\pm\) 0.16 & 99.00 \(\pm\) 0.13 & 47.75 \\ \hline C,N,X,V (stacking) & 87.97 \(\pm\) 3.85 & 94.33 \(\pm\) 2.05 & 98.96 \(\pm\) 0.15 & 98.99 \(\pm\) 0.10 & 47.75 \\ \hline B,C,N (stacking) & 89.76 \(\pm\) 3.96 & 94.38 \(\pm\) 1.92 & 98.90 \(\pm\) 0.22 & 98.84 \(\pm\) 0.13 & 47.75 \\ \hline B,C,N,V (stacking) & 89.73 \(\pm\) 3.87 & 94.31 \(\pm\) 1.99 & 98.91 \(\pm\) 0.21 & 98.87 \(\pm\) 0.12 & 48.5 \\ \hline S,C,X,E,V (stacking) & 88.75 \(\pm\) 5.02 & 95.87 \(\pm\) 1.80 & 96.46 \(\pm\) 0.39 & 99.01 \(\pm\) 0.13 & 50.5 \\ \hline S,N,E,V (stacking) & 91.74 \(\pm\) 3.86 & 95.59 \(\pm\) 2.18 & 98.29 \(\pm\) 0.37 & 96.64 \(\pm\) 0.34 & 50.5 \\ \hline S,C,E,V (stacking) & 89.16 \(\pm\) 4.38 & 96.04 \(\pm\) 1.83 & 96.13 \(\pm\) 0.35 & 98.93 \(\pm\) 0.18 & 50.75 \\ \hline S,C,X,E (stacking) & 88.80 \(\pm\) 4.70 & 95.86 \(\pm\) 1.80 & 96.49 \(\pm\) 0.43 & 98.99 \(\pm\) 0.11 & 51 \\ \hline B,S,C,E,V (stacking) & 89.60 \(\pm\) 4.38 & 95.84 \(\pm\) 1.78 & 96.13 \(\pm\) 0.37 & 98.93 \(\pm\) 0.17 & 52 \\ \hline S,C,N,E (voting) & 91.92 \(\pm\) 3.47 & 96.27 \(\pm\) 1.54 & 94.67 \(\pm\) 1.30 & 98.02 \(\pm\) 0.35 & 53.25 \\ \hline B,S,C,N,E (voting) & 92.04 \(\pm\) 3.26 & 94.61 \(\pm\) 2.19 & 96.70 \(\pm\) 0.40 & 97.37 \(\pm\) 0.51 & 54 \\ \hline S,N,E (stacking) & 91.21 \(\pm\) 3.81 & 95.66 \(\pm\) 2.08 & 98.29 \(\pm\) 0.36 & 96.66 \(\pm\) 0.36 & 54 \\ \hline B,S,C,E (stacking) & 89.44 \(\pm\) 4.38 & 95.84 \(\pm\) 1.73 & 96.08 \(\pm\) 0.37 & 98.91 \(\pm\) 0.16 & 54.5 \\ \hline S,C,N (voting) & 90.48 \(\pm\) 2.19 & 94.87 \(\pm\) 1.71 & 97.14 \(\pm\) 0.34 & 98.69 \(\pm\) 0.17 & 56.25 \\ \hline S,C,E (stacking) & 88.70 \(\pm\) 5.00 & 95.93 \(\pm\) 1.93 & 96.11 \(\pm\) 0.37 & 98.92 \(\pm\) 0.15 & 56.5 \\ \hline C,N (stacking) & 88.02 \(\pm\) 3.58 & 94.43 \(\pm\) 1.94 & 98.89 \(\pm\) 0.22 & 98.83 \(\pm\) 0.13 & 57 \\ \hline B,S,N,X,V (stacking) & 91.10 \(\pm\) 2.11 & 93.98 \(\pm\) 1.43 & 98.36 \(\pm\) 0.32 & 97.01 \(\pm\) 0.34 & 57.75 \\ \hline B,N,X,E,V (stacking) & 91.24 \(\pm\) 4.21 & 94.71 \(\pm\) 2.19 & 98.31 \(\pm\) 0.31 & 96.42 \(\pm\) 0.25 & 58.75 \\ \hline C,N,V (stacking) & 87.88 \(\pm\) 3.68 & 94.33 \(\pm\) 2.00 & 98.88 \(\pm\) 0.22 & 98.86 \(\pm\) 0.14 & 59 \\ \hline B,N,X,E (stacking) & 90.58 \(\pm\) 4.79 & 94.73 \(\pm\) 2.11 & 98.31 \(\pm\) 0.34 & 96.39 \(\pm\) 0.30 & 61.75 \\ \hline B,S,N,X (stacking) & 90.42 \(\pm\) 2.91 & 93.67 \(\pm\) 1.68 & 98.36 \(\pm\) 0.32  
\begin{table}
\begin{tabular}{c c c c c c} \hline \hline
**Combination** & **Small** & **Spoofing** & **Large** & **CelebA** & **Rank** \\ \hline B,N,E,V (stacking) & 91.51 \(\pm\) 3.91 & 94.64 \(\pm\) 2.27 & 98.26 \(\pm\) 0.33 & 95.59 \(\pm\) 0.66 & 66.5 \\ \hline B,S,N (stacking) & 91.38 \(\pm\) 2.85 & 93.45 \(\pm\) 1.70 & 98.30 \(\pm\) 0.36 & 96.39 \(\pm\) 0.25 & 67 \\ \hline S,N,X (stacking) & 88.64 \(\pm\) 3.23 & 93.72 \(\pm\) 1.76 & 98.37 \(\pm\) 0.30 & 96.98 \(\pm\) 0.36 & 68.75 \\ \hline N,X,E (stacking) & 89.26 \(\pm\) 5.36 & 94.75 \(\pm\) 2.25 & 98.28 \(\pm\) 0.33 & 96.39 \(\pm\) 0.27 & 69.25 \\ \hline B,C,X,E,V (stacking) & 86.50 \(\pm\) 6.03 & 95.15 \(\pm\) 2.09 & 96.10 \(\pm\) 0.42 & 98.93 \(\pm\) 0.12 & 70 \\ \hline B,N,E (stacking) & 91.38 \(\pm\) 4.29 & 94.60 \(\pm\) 2.23 & 98.24 \(\pm\) 0.35 & 95.58 \(\pm\) 0.67 & 70 \\ \hline B,S,C,X,V (stacking) & 87.37 \(\pm\) 3.25 & 93.47 \(\pm\) 1.93 & 96.42 \(\pm\) 0.42 & 98.98 \(\pm\) 0.10 & 70.75 \\ \hline B,C,X,E (stacking) & 86.08 \(\pm\) 6.03 & 95.17 \(\pm\) 2.04 & 96.11 \(\pm\) 0.44 & 98.91 \(\pm\) 0.10 & 71.25 \\ \hline C,N (voting) & 85.89 \(\pm\) 3.65 & 94.49 \(\pm\) 1.73 & 98.20 \(\pm\) 0.23 & 98.89 \(\pm\) 0.14 & 71.25 \\ \hline B,S,C,X (stacking) & 87.01 \(\pm\) 3.52 & 93.37 \(\pm\) 1.96 & 96.41 \(\pm\) 0.44 & 98.95 \(\pm\) 0.11 & 73.75 \\ \hline N,E,V (stacking) & 89.70 \(\pm\) 4.87 & 94.75 \(\pm\) 2.26 & 98.25 \(\pm\) 0.34 & 95.57 \(\pm\) 0.67 & 74.25 \\ \hline C,X,E,V (stacking) & 84.62 \(\pm\) 6.93 & 95.29 \(\pm\) 1.92 & 96.03 \(\pm\) 0.46 & 98.95 \(\pm\) 0.10 & 75.25 \\ \hline S,N,V (stacking) & 89.07 \(\pm\) 2.95 & 93.94 \(\pm\) 1.56 & 98.28 \(\pm\) 0.37 & 96.39 \(\pm\) 0.27 & 75.75 \\ \hline S,N (stacking) & 89.05 \(\pm\) 3.03 & 93.53 \(\pm\) 1.78 & 98.30 \(\pm\) 0.37 & 96.35 \(\pm\) 0.23 & 76.25 \\ \hline B,C,E,V (stacking) & 86.78 \(\pm\) 5.80 & 95.15 \(\pm\) 2.04 & 95.61 \(\pm\) 0.44 & 98.63 \(\pm\) 0.36 & 77.75 \\ \hline N,E (stacking) & 89.31 \(\pm\) 5.31 & 94.56 \(\pm\) 2.28 & 98.25 \(\pm\) 0.34 & 95.57 \(\pm\) 0.70 & 78 \\ \hline S,C,X,V (stacking) & 85.36 \(\pm\) 3.77 & 93.50 \(\pm\) 1.83 & 96.32 \(\pm\) 0.43 & 98.96 \(\pm\) 0.11 & 78.25 \\ \hline S,C,X (stacking) & 85.29 \(\pm\) 3.33 & 93.44 \(\pm\) 1.94 & 96.33 \(\pm\) 0.44 & 98.94 \(\pm\) 0.11 & 80.75 \\ \hline C,X,E (stacking) & 84.14 \(\pm\) 7.19 & 95.29 \(\pm\) 2.00 & 95.98 \(\pm\) 0.44 & 98.89 \(\pm\) 0.14 & 81.5 \\ \hline B,C,E (stacking) & 86.45 \(\pm\) 5.89 & 95.07 \(\pm\) 2.18 & 95.57 \(\pm\) 0.47 & 98.59 \(\pm\) 0.34 & 81.5 \\ \hline B,S,C,N (voting) & 90.14 \(\pm\) 3.04 & 91.05 \(\pm\) 2.07 & 98.06 \(\pm\) 0.23 & 97.22 \(\pm\) 0.31 & 81.5 \\ \hline B,S,C,V (stacking) & 86.59 \(\pm\) 3.06 & 93.46 \(\pm\) 1.98 & 95.89 \(\pm\) 0.37 & 98.84 \(\pm\) 0.13 & 83.25 \\ \hline B,S,C (stacking) & 86.97 \(\pm\) 3.06 & 93.43 \(\pm\) 1.98 & 95.84 \(\pm\) 0.37 & 98.79 \(\pm\) 0.13 & 84.25 \\ \hline S,C,N,X,E (voting) & 89.00 \(\pm\) 3.80 & 94.19 \(\pm\) 2.23 & 94.27 \(\pm\) 1.32 & 97.30 \(\pm\) 0.38 & 84.25 \\ \hline S,N,E (voting) & 91.24 \(\pm\) 3.92 & 94.94 \(\pm\) 2.10 & 93.40 \(\pm\) 1.45 & 95.73 \(\pm\) 0.54 & 84.75 \\ \hline B,N,X,V (stacking) & 89.10 \(\pm\) 3.89 & 91.46 \(\pm\) 1.99 & 98.32 \(\pm\) 0.32 & 96.01 \(\pm\) 0.56 & 85.75 \\ \hline C,E,V (stacking) & 84.71 \(\pm\) 7.06 & 95.11 \(\pm\) 2.08 & 95.53 \(\pm\) 0.45 & 98.62 \(\pm\) 0.35 & 87 \\ \hline S,C,N,E,V (voting) & 89.06 \(\pm\) 2.95 & 94.29 \(\pm\) 2.30 & 92.78 \(\pm\) 1.63 & 97.37 \(\pm\) 0.37 & 88 \\ \hline C,E (stacking) & 84.57 \(\pm\) 6.90 & 94.98 \(\pm\) 2.24 & 95.50 \(\pm\) 0.46 & 98.58 \(\pm\) 0.33 & 89 \\ \hline B,C,N,E (voting) & 89.11 \(\pm\) 2.67 & 93.30 \(\pm\) 2.63 & 95.49 \(\pm\) 3.40 & 96.64 \(\pm\) 0.81 & 89.5 \\ \hline S,C,V (stacking) & 85.22 \(\pm\) 3.65 & 93.44 \(\pm\) 1.89 & 95.89 \(\pm\) 0.34 & 98.83 \(\pm\) 0.09 & 90 \\ \hline S,C,E (voting) & 88.00 \(\pm\) 4.21 & 95.36 \(\pm\) 2.18 & 92.54 \(\pm\) 1.12 & 96.92 \(\pm\) 0.46 & 90 \\ \hline S,C (stacking) & 85.08 \(\pm\) 3.71 & 93.40 \(\pm\) 1.97 & 95.82 \(\pm\) 0.35 & 98.78 \(\pm\) 0.14 & 93 \\ \hline B,N,X (stacking) & 88.37 \(\pm\) 4.42 & 91.35 \(\pm\) 1.88 & 98.31 \(\pm\) 0.33 & 95.99 \(\pm\) 0.55 & 93.5 \\ \hline N,X,V (stacking) & 86.73