Patent ID: 8140998

Claim:
An imaging device comprising: a camera unit constructed to take an image in a predetermined imaging area; a display unit used for image display; an image input module constructed to input an image; a command display module configured to display a menu image including multiple command icons, which are to be selected for device setting, on the display unit; a command operation unit operated to select one of the multiple command icons included in the menu image, which is displayed on the display unit by the command display module; and a processor configured to perform a processing operation specified by the selected command icon, wherein the command display module displays the menu image in a hierarchical manner, a top menu image on an uppermost layer in the hierarchy includes a camera image command icon activated to set a camera image taken with the camera unit to a display image on the display unit and an external image command icon activated to set an external input image input by the image input module to the display image on the display unit, and some of command icons included in a lower-layer menu image displayed on the display unit in response to selection of the camera image command icon in the top menu image by an operation of the command operation unit are different from some of command icons included in a lower-layer menu image displayed on the display unit in response to selection of the external image command icon in the top menu image by an operation of the command operation unit; wherein any menu image displayed by the command display module on any layer in the hierarchy has a command icon specifying deletion of the menu image and a return to a menu image non-display mode where the menu image is not displayed on the display unit.