1. A method for training a vision system, the method comprising: instructing the vision system to enter a region of interest training mode by showing a region of interest training mode key to the vision system, the vision system entering the region of interest training mode based on the showing the region of interest training mode key; indicating a contour of a region of interest to the vision system by showing the region of interest to the vision system using a training key, the training key graphically indicating the contour of the region of interest; and instructing the vision system to enter a run mode by showing a run mode key to the vision system, the vision system entering the run mode based on the showing the run mode key.