In an image processing apparatus which generates an input signal when a mobile information terminal contacts a display surface and makes a wireless communication with the contacting mobile information terminal, it is difficult to make an appropriate display by discriminating whether a contact object is a mobile information terminal or a user's finger. To accomplish this, when a mobile information terminal (200) is placed on a touch panel (104), this placement is recognized based on a wireless communication response (701), and a processing menu for the terminal is displayed. On the other hand, if the user's finger (300) is placed, since no wireless communication response (701) is detected, it is recognized that the contact object is not the mobile information terminal (200), and a general manipulation menu is displayed.