Camera Calibration fails to run

edit

I am running ROS Indigo on Ubuntu 14.04. I am trying to follow the camera calibration tutorial on the ROS Wiki.

http://wiki.ros.org/camera_calibration

I give the following command

rosrun camera_calibration cameracalibrator.py --size 8x6 --square 0.108 image:=/my_camera/image camera:=/my_camera

I get the following error

ImportError: numpy.core.multiarray failed to import Traceback (most recent call last): File "/opt/ros/indigo/lib/camera_calibration/cameracalibrator.py", line 47, in <module> import cv2 ImportError: numpy.core.multiarray failed to import

I thought it was to do with updating numpy and did a rosdep update but no differnce.

What is a possible way to solve this problem.