A method of identifying and scaling a region of interest on a display device is presented. The region of interest is detected based on the rate of change between frames. A size of the display area of the display device and aspect ratio are determined. The detected region of interest is scaled to fit the display area in full screen mode based on the display area and the aspect ratio. The region of interest may be, for example, an active video region. In full screen mode, any static or slow-moving images are hidden.