Camera Calibration on Nao Robot

edit

hello there,

I would like to use Camera calibration that is already implemented in ROS, to get the images of my robot Nao, and then use the information of the calibration to calculate the real world coordinate..

http://www.ros.org/wiki/camera_calibr...

I don't know how would I do it with the robot camera, they have example of Monocular Camera...

Any help?

EDIT

here what I would like to do, and I thought camera calibration would do it for me:

I want to define a zero point in the environment or what they call it a reference point in which that point will have (0,0,0) values I want to take some picture of the environment where I have objects set on some places I want to measure the coordinates of the object in real life "I will do that manually with a meter" I want to feed a method "I don't know what method" with these values so it will be able to compare between real life coordinate and pixel coordinate anytime it needs to assume the real life coordinate any idea how can I do that ?

Regards,

Shamma