1. An information display apparatus which superposes information on an imaged image and displays them, comprising: a detection unit configured to detect, with a sensor, a movement direction of the imaged image relative to an imaging target; a determination unit configured to determine a location of a target area within the imaged image, based on the movement direction detected by the detection unit, wherein the location of the target area is shifted within the imaged image in the movement direction detected by the detection unit; a recognition unit configured to recognize an object in the imaged image; and a display control unit configured to superpose, on the imaged image, information related to the object when the object is in the target area, and not superpose, on the imaged image, the information related to the object when the object is outside the target area, wherein, in a case where a ratio of the objects existing in the imaged image does not exceed a threshold value, the detection unit does not measure the movement direction, the determination unit determines the whole imaged image as the target area, the recognition unit recognizes the objects recognizable in the imaged image, and the display control unit superposes, on the imaged image, the information related to the recognized objects in the imaged image.