Apparatus and method for displaying image

An apparatus and a corresponding method for displaying image are provided. The apparatus includes a physical camera, a display and a processor. The physical camera takes a first image. The processor is coupled to the physical camera and the display. The processor determines the position of a viewer relative to the display according to the first image, determines the position of a virtual camera relative to a three-dimensional (3D) scene model according to the position of the viewer relative to the display, and controls the display to display a second image of the 3D scene model taken by the virtual camera.