Improve figure situation

doc/paper/rotohsm_paper.tex

@@ -96,10 +96,10 @@ This work contains the following contributions:
 
 \begin{figure}
     \center
-    \includegraphics[width=8cm]{prototype_pic.jpg}
-    \caption{The protoype when we first achieved reliable power transfer and bidirectional communication between stator
-    and rotor. In the picture, the prototype was communicating reliably up to the maximum $\approx\SI{1500}{rpm}$ that
-    we could get out of its hobby quadcopter parts.}
+    \includegraphics[width=12cm]{prototype_pic2.jpg}
+    \caption{The protoype as we used it to test power transfer and bidirectional communication between stator
+    and rotor. In the picture, the prototype is missing the vertical security mesh struts connecting the circular top
+    and bottom outer meshes that rotate around the stationary payload in the center.}
     \label{prototype_picture}
 \end{figure}
 
@@ -512,30 +512,38 @@ We consider the quality of the plugin's output sufficient for practical applicat
 plugin, this results in an efficient toolchain from mechanical CAD design to production-ready PCB files.
 
 \begin{figure}
-    \begin{subfigure}{0.45\textwidth}
+    \begin{subfigure}{0.35\textwidth}
         \center
         \includegraphics[height=7cm]{proto_3d_design.jpg}
         \caption{The 3D CAD design of the prototype.}
         \label{proto_3d_design}
     \end{subfigure}
     \hfill
-    \begin{subfigure}{0.45\textwidth}
-        \vfil
-        \includegraphics[width=6cm]{mesh_scan_crop.jpg}
-        \vfil
-        \caption{Part of the security mesh PCB we produced with our toolchain for the prototype HSM.}
-        \label{mesh_gen_sample}
+    \begin{subfigure}{0.6\textwidth}
+        \includegraphics[width=8cm]{rotor_stator.jpg}
+        \center 
+        \caption{Assembled mechanical prototype rotor (left) and stator (right) PCB components.}
     \end{subfigure}
     \caption{Our prototype IHSM's PCB security mesh design}
 \end{figure}
 
 \begin{figure}
-    \center
-    \includegraphics[width=9cm]{mesh_gen_viz.pdf}
-    \caption{Overview of the automatic security mesh generation process. 1 - the blob is the example target area. 2 - A
-    grid is overlayed. 3 - Grid cells outside of the target area are removed. 4 - A random tree covering the remaining
-    cells is generated. 5 - The mesh traces are traced along a depth-first walk of the tree. 6 - Result.}
-    \label{mesh_gen_viz}
+    \begin{subfigure}{\textwidth}
+        \center
+        \includegraphics[width=9cm]{mesh_gen_viz.pdf}
+        \caption{Overview of the automatic security mesh generation process. 1 - the blob is the example target area. 2 - A
+        grid is overlayed. 3 - Grid cells outside of the target area are removed. 4 - A random tree covering the remaining
+        cells is generated. 5 - The mesh traces are traced along a depth-first walk of the tree. 6 - Result.}
+        \label{mesh_gen_viz}
+    \end{subfigure}
+    \begin{subfigure}{\textwidth}
+        \center
+        \includegraphics[width=6cm]{mesh_scan_crop.jpg}
+        \caption{Detail of a PCB produced with a generated mesh.}
+        \label{mesh_gen_sample}
+    \end{subfigure}
+    \label{mesh_gen_fig}
+    \caption{Our automatic security mesh generation process}
 \end{figure}
 
 \subsection{Power transmission through the rotating joint}