1. A method for specifying an area of interest in a 3D imaging system including a plurality of cameras that include at least first and second cameras wherein each camera has a field of view arranged along a camera distinct trajectory, the method comprising the steps of: presenting a part at a location within the fields of view of the plurality of cameras; indicating on the part an area of interest that is within the field of view of each of the plurality of cameras; for each of the plurality of cameras: (i) acquiring at least one image of the part including the area of interest; (ii) identifying a camera specific field of interest within the field of view of the camera associated with the area of interest in the at least one image; and (iii) storing the field of interest for subsequent use.