1. An image display apparatus, comprising: a display unit; a camera unit configured to capture a subject, and to acquire a depth image from the captured subject; and a controller operatively connected to the display unit and the camera unit, the controller configured to extract a dead pixel from depth information of the depth image, to form a first region having a predetermined similarity to the extracted the dead pixel based on light intensity information of the depth image, and to restore pixel value of the dead pixel based on pixel values within the formed first region, wherein when the dead pixel is restored, the display unit displays an indicator corresponding to a shape of the restored depth image, wherein the controller controls the displayed indicator to be moved or controls a predetermined function to be carried out according to the movement of the subject, and wherein when detecting continuous movements of the subject between left and right, the controller is configured to control the number of channels outputted to the display unit to be regulated and outputted according to the number of continuous movements between left and right, and to display a plurality of screen channels corresponding to the number of channels together with currently outputted channel.