viz.md

+Visualisation tools for HRI
+===========================
+
+:speech_balloon: what visualisation would be useful? add your ideas below
+
+- display human skeletons
+- display meshed humans
+- display a face without the skeleton
+
+> what about audio/dialogue?
+
+References
+----------
+
+- How to write a new RViz display: http://docs.ros.org/lunar/api/rviz_plugin_tutorials/html/display_plugin_tutorial.html 
+
+- TF frames produced by `openni_ros`:
+
+![openni_ros](https://git.brl.ac.uk/uploads/echos/ros4hri/bb7ec282e6/openni_ros.jpg)
+
+- Speech bubble in Choregraphe:
+
+![choregraphe-speech-bubble](https://git.brl.ac.uk/uploads/echos/ros4hri/34b5cde02c/choregraphe-speech-bubble.png)
+