Problem building package that needs opencv

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Hi, I'm getting an error during catkin make that I can't seem to get past.

I made sure to install ros-groovy-opencv2, yet I don't seem to have the opencv2Config.cmake file.

Thanks in advance!

Here is the error:

==> add_subdirectory(img_sender)
CMake Error at /opt/ros/groovy/share/catkin/cmake/catkinConfig.cmake:72 (find_package): Could not find a configuration file for package opencv2.

Set opencv2_DIR to the directory containing a CMake configuration file for opencv2.  The file will have one of the following names:

opencv2Config.cmake
opencv2-config.cmake