cv_bridge converter tutorial not compiling

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buildtool_depend must only be catkin. The others mentioned there have to be build_depend

E.g.:

  <buildtool_depend>catkin</buildtool_depend>

  <build_depend>roscpp</build_depend>
  <build_depend>rospy</build_depend>
  <build_depend>std_msgs</build_depend>
  <build_depend>image_transport</build_depend>
  <build_depend>cv_bridge</build_depend>

  <run_depend>roscpp</run_depend>
  <run_depend>rospy</run_depend>
  <run_depend>std_msgs</run_depend>
  <run_depend>image_transport</run_depend>
  <run_depend>cv_pridge</run_depend>

Further, you have to find_package them in your CMakeLists.txt (in case you not yet have):

find_package(catkin REQUIRED COMPONENTS roscpp rospy std_msgs image_transport cv_bridge)