1. A method of identifying an object of interest in a controlled area surrounded by at least two pairs of 3D sensors, the method comprising: collecting first 3D image data representing the controlled area using at least two pairs of 3D sensors surrounding the controlled area; detecting a zone of interest within the controlled area based on the first 3D image data; collecting second image data representing the detected zone of interest utilizing at least one pair of 3D sensors; and identifying an object of interest in the controlled area based on the second 3D image data.