A system includes a three-dimensional camera and a processor communicatively coupled to the three-dimensional camera. The processor is operable to determine a first and second edge of a dairy livestock. The first edge includes an inner portion of a first hind leg and a first portion of an udder of the dairy livestock. The second edge includes an inner portion of a second hind leg and a second portion of the udder of the dairy livestock. The processor calculates a reference point associated with the udder of the dairy livestock based at least in part upon the first edge and the second edge. A robotic attacher moves toward the udder of the dairy livestock based at least in part upon the calculated reference point.