1. An image forming system comprising: a photographing apparatus to photograph an image of an object; a detecting apparatus to detect a region of the object corresponding to an object model from a difference image of the object using the object model, wherein the object model is learned from a feature population extracted from a difference image of positive and negative samples of the object; a status parameter computing apparatus to compute status parameters based on the detected object region where the object exists in the image of the object, so as to enable the object to be in the central region of the image; a controller to receive the status parameters and adjust the status of the image; a storing apparatus to store the image of the object; and a display apparatus to display the image of the object.