\section{results}

\subsection{Overall ROC}
The overall ROC can be found in Figure \ref{fig:overallROC}. With a false acceptance rate of 0,05, The recognition performance is above 99,88\%
\begin{figure}[ht]
\centering
\includegraphics[width=.8\linewidth]{image/final_ROC_log}
\caption{ The overall ROC}
\label{fig:overallROC}
\end{figure}

\subsection{Individual ROC’s}
18 out of the 31 individuals have a perfect ROC. Which means that the highest impostor score is lower than the lowest genuine score. An example of a perfect ROC can be found in Figure \ref{fig:nd1S04934_ROC}. All images from these 18 individuals are analyzed. In all of these images the person looks direct into the camera.  A part of the eyes is visible and no parts of the face are covered. All images have a relative high resolution of 1704~by~2272 pixels. 
\begin{figure}[ht]
\centering
\includegraphics[width=.8\linewidth]{image/nd1S04934_ROC}
\caption{A perfect ROC}
\label{fig:nd1S04934_ROC}
\end{figure}
Not all ROC’s are perfect. In Figure \ref{fig:nd1S04341_ROC} is the ROC of subject nd1S04341. This deviation is caused by one matching score of zero. In figure \ref{fig:nd1S04341} are the corresponding pictures. The main difference between this pictures is the visibility of the ears. 
\begin{figure}[ht]
\centering
\includegraphics[width=.8\linewidth]{image/nd1S04341_ROC}
\caption{ROC of subject nd1S04341}
\label{fig:nd1S04341_ROC}
\end{figure}
\begin{figure}[ht]
\begin{minipage}[th]{.45\linewidth}
\centering
\vspace{0pt}
\includegraphics[width=\linewidth]{image/04341d147}
\end{minipage}\hfill
\begin{minipage}[th]{.45\linewidth}
\centering
\vspace{0pt}
\includegraphics[width=\linewidth]{image/04341d154}
\end{minipage}\hfill
\caption{Pictures of subject nd1S04341}
\label{fig:nd1S04341}
\end{figure}
Another interesting result is the visibility of the face. In Figure 6 is the ROC of subject nd1S04406. There are a few genuine which a relative low. One of these matching scores in the matching score between the pictures in Figure 6. There are a few differences between these pictures. The first is the visibility of the left part of the face. In the left picture a bigger part of the face is covered with hair. Furthermore, only in the left picture, the teeth are shown.
\begin{figure}[ht]
\centering
\includegraphics[width=.8\linewidth]{image/nd1S04406_ROC}
\caption{ROC of subject nd1S04406}
\label{fig:nd1S04406_ROC}
\end{figure}
\begin{figure}[ht]
\begin{minipage}[th]{.45\linewidth}
\centering
\vspace{0pt}
\includegraphics[width=\linewidth]{image/04341d147}
\end{minipage}\hfill
\begin{minipage}[th]{.45\linewidth}
\centering
\vspace{0pt}
\includegraphics[width=\linewidth]{image/04341d154}
\end{minipage}\hfill
\caption{Pictures of subject nd1S04341}
\label{fig:nd1S04341}
\end{figure}
