We are designing a self controlling active camera system for a 3D video of a moving object (mainly human body). We made up our system of cameras with long focal length lenses for high resolution input images. However, such cameras can get only partial views of the object. We present, in this paper, a multiple active (pan-tilt) camera assignment scheme. The goal is to assign each camera to a specific part of the moving object so as to allow the best visibility of the whole object. For each camera, we evaluate the visibility to the different regions of the object, corresponding to different camera orientations and with respect to the field of view of the camera in question. Thereafter, we assign each camera to one orientation in such a way to maximize the visibility to the whole object.