Get a image target global position unity,vuforia,kinect.

Hi!.

Im work with unity, vuforia and kinect. I would like track my head position with kinect, it give me global position of my head/camera. I track image target with vuforia it give me local position relative to camera. But i need a global position of my image target. In vuforia when you set camera as world center global position is always the same as local position relative to camera.

To sum up. I need global position image target on scene.

Any sugestions ?