1. A method of refining a vision system comprising: obtaining image intensity data of a field of view and a depth map of objects within the field of view; determining if the image intensity data and the depth map include information related to a target; searching for the top of the target in the image intensity data using information in the depth map; searching for vertical edges of the target in the image intensity data using information in the depth map; and searching for the bottom of the target in the image intensity data using information in the depth map.