Cannot create package with opencv2 dependency using ROS Groovy

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You are trying to create a package that depends on opencv2 and it seems that you don't have opencv2 installed yet.

However, I would suggest you to create a catkin package, as you are using Groovy and you are inside a catkin workspace. This tutorial seems to have been last edited before Groovy was released, and that is why it is not creating a catkin package.

To make sure you have opencv2 installed, try:

$ sudo apt-get install ros-groovy-opencv2

Retry creating your package after that. You can either follow the tutorial or create a catking package:

$ catkin_create_pkg learning_image_transport image_transport opencv2 cv_bridge