ROS Wrapper for Openface 2.1.0

This is a ROS wrapper for OpenFace 2.1.0. In particular, given an image of a face, it will output:

• Eye Gaze Vectors
• Head Pose
• 2D Landmarks
• 3D Landmarks
• Action Units
• Debug Visualization (optional)

ROS Parameters

Required

• ~image_topic - The topic the image is provided on (e.g. /usb_cam/image_raw).

Optional

• ~publish_viz - Set to true to publish a debug visualization (default: false).

Installation

• Clone the OpenFace project release 2.1.0 : git clone https://github.com/TadasBaltrusaitis/OpenFace/tree/OpenFace_2.1.0
• Download model : Model download · TadasBaltrusaitis/OpenFace Wiki · GitHub
• Install OpenFace, following this instruction : Unix Installation · TadasBaltrusaitis/OpenFace Wiki · GitHub (don't forget to sudo make install at the end)
• Download openface2_ros to your catkin src folder and cd .. && catkin make
• Clone usb_cam ros node or other ros node of your choice for interfacing with USB camera

Running

• roscore
• rosrun usb_cam usb_cam_node
• roslaunch openface2_ros openface2_ros.launch

Notes

This node requires cv_bridge and OpenCV 3. You must ensure that cv_bridge is also linked against OpenCV 3. If you get a warning during compilation, you may have to manually clone the vision_opencv repository and re-build cv_bridge.

Issues

If running openface2_ros results in a segfault or you see the following lines when running catkin_make:

/usr/bin/ld: warning: libopencv_imgproc.so.2.4, needed by /opt/ros/indigo/lib/libcv_bridge.so, may conflict with libopencv_imgproc.so.3.1
/usr/bin/ld: warning: libopencv_highgui.so.2.4, needed by /opt/ros/indigo/lib/libcv_bridge.so, may conflict with libopencv_highgui.so.3.1
/usr/bin/ld: warning: libopencv_calib3d.so.2.4, needed by /usr/lib/x86_64-linux-gnu/libopencv_contrib.so.2.4.8, may conflict with libopencv_calib3d.so.3.1

then openface2 ros is linking against OpenCV2 instead of OpenCV3. To fix this: update cmake to at least 3.6.2, rebuild OpenCV3, clone vision_opencv into the src folder of your catkin workspace, then recompile cv_bridge. Remake your catkin workspace, and the segfault and warnings should have been resolved.

Published Topics

• /openface2/faces ( openface2_ros/faces )
• /openface2/image ( sensor_msgs/Image )

Messages

Faces

std_msgs/Header header

openface_ros/Face[] faces
uint32 count```

FaceFeatures

geometry_msgs/Vector3 left_gaze
geometry_msgs/Vector3 right_gaze
geometry_msgs/Vector3 gaze_angle

geometry_msgs/Pose head_pose

geometry_msgs/Point[] landmarks_3d
geometry_msgs/Point[] landmarks_2d

openface_ros/ActionUnit[] action_units

ActionUnit

string name
float64 presence
float64 intensity

Changelog

• Accommodate major changes in openface 2.0.6 (functions and classes naming & grouping)
• Add eye gaze angle in the Face message type
• Add Faces message type (an array of Face message type) in order to accommodate the new multiple face detection in openface 2.0