Finger identification: subtitles and figures

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@@ -538,6 +538,40 @@ FingerCuts \cite{goguey14,goguey14a,goguey17}
 
 Leverages finger identification for command selection and direct manipulation of parameters.
 
+\subsubsection{Input vocabulary}
+
+\begin{figure}[htb]
+  \centering
+  \includegraphics[width=\columnwidth]{figures/hotfingers}
+  \label{fig:hotfingers}
+  \caption[Command selection with finger identification.]{Command senection with finger identification. A chord with the left hand whows a crib sheet of commands users can select with the right hand. The user selects a command and adjusts the parameters with direct manipulation. The user can lift the left hand while adjusting the command parameters. The user can invoke additional constraints on the command parameters with the left hand.}
+\end{figure}
+
+\subsubsection{Prototyping apparatus}
+
+\begin{figure}[htb]
+  \centering
+  \includegraphics[height=3.9cm]{figures/hotfingers-setup}
+  \hfill
+  \includegraphics[height=3.9cm]{figures/hotfingers-tablette}
+  \hfill
+  \includegraphics[height=3.9cm]{figures/hotfingers-phone}
+  \label{fig:hotfingers-prototypes}
+  \caption[Finger identification prototypes.]{Three implementations of finger identification prototypes. The first one uses gametracks to locate fingers on a tabletop. The two other ones use color markers with a camera to track fingers on a tablet and a smartphone.}
+\end{figure}
+
+\subsubsection{Discoverability}
+
+\begin{figure}[htb]
+  \centering
+  \includegraphics[height=3.3cm]{figures/hotfingers-help}
+  \hfill
+  \includegraphics[height=3.3cm]{figures/hotfingers-lefthand}
+  \hfill
+  \includegraphics[height=3.3cm]{figures/hotfingers-lefthand2}
+  \label{fig:hotfingers-helps}
+  \caption[Discoverability features for FingerCuts.]{Discoverability features for FingerCuts. Users can see all the available commands when touching the surface with all their fingers. Crib sheets show the avaiable commands and constraints when fingers of the left hand are touching the surface.}
+\end{figure}
 
 \subsection{Interaction in VR}
 \label{sec:interactionvr}