Hello Forum
I am trying to determine the camera matrix so that I can extract the position of the camera in world coordinates. I have an image (below) and have all the points in world (meters) and pixel coordinates.

The problem is, all the points have the same height ie. Z = 0 and hence the matrix is singular. 
Is there another way for me to obtain the camera matrix ?
Regards,
Haziq
EDIT: In short, I would like to determine the location of the camera in world coordinates and this website http://ksimek.github.io/2012/08/14/decompose/ extracts the camera location from the camera matrix. Is there any other way for me to get the location of the camera ??
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