A portable terminal includes a display control unit, an extraction unit, and a compositing unit. The display control unit displays a specifying frame for specifying a specified region which is a partial region in a display image displayed on a touch panel display, and a color designation mark for designating a reference color from colors included in an image of the specified region in the specifying frame, in superposition with the display image. The extraction unit extracts an image corresponding to the reference color designated by the color designation mark from the image of the specified region in the specifying frame, as a compositing target image. The compositing unit generates a composite image in which the compositing target image is composited in a selection image selected by a user.