problem in use pi_face_tracker
I want to run the pi_face_tracker on my ROS, however, in the step of "rosdep install pi_vision", I always get error like: ERROR: the following packages/stacks could not have their rosdep keys resolved to system dependencies: pi_face_tracker_gui: Missing resource rosbridge
ROS path [0]=/opt/ros/groovy/share/ros ROS path [1]=/home/tishiba/catkin_ws/src/beginner_tutorials/rosbridge_suite ROS path [2]=/home/tishiba/catkin_ws/src/beginner_tutorials/pi_vision ROS path [3]=/home/tishiba/catkin_ws/src/beginner_tutorials/pi_vision ROS path [4]=/home/tishiba/catkin_ws/src/beginner_tutorials/pi_vision ROS path [5]=/home/tishiba/catkin_ws/src/beginner_tutorials/uvc_cam ROS path [6]=/home/tishiba/catkin_ws/src/beginner_tutorials ROS path [7]=/home/tishiba/catkin_ws/src ROS path [8]=/opt/ros/groovy/share ROS path [9]=/opt/ros/groovy/stacks anybody know how to solve the problem?