How to determine world coordinates of a camera?

Question

I have a rectangular target of known dimensions and location on a wall, and a mobile camera on a robot. As the robot is driving around the room, I need to locate the target and

Answer 1

It took me forever to understand it, but the pose meaning is the rotation over each axes - x,y,z. It is in radians. The values are between Pie to minus Pie (-3.14 - 3.14)

Edit: I've might been mistaken. I read that the pose is the vector which indicates the direction of the camera, and the length of the vector indicates how much to rotate the camera around that vector.