1. An image system comprising: a light source configured to illuminate at least one portion of an object; an image sensing device configured to generate an object image produced by the object; a computing apparatus configured to determine an intensity value of light from the light source representing the object image and to determine a distance between the object and the image sensing device using the intensity value of the light and a dimension of the object image, wherein the computing apparatus is further configured to determine the intensity value of the light based on an intensity of the light from the light source that is reflected from the object, and the dimension of the object image is based on a distance of the object from the image sensing device; and a visible light image sensing device configured to generate a visible light picture of the object, wherein the computing apparatus is further configured to determine a position of the visible light picture and a dimension of the object based on the visible light picture.