A more favorably visibility-improved video is obtained. A device includes: a video input unit; a first Retinex processing unit which performs a first Retinex process on a video inputted from the video input unit; a second Retinex processing unit which performs a second Retinex process, which is different from the first Retinex process in a method, on the video inputted from the video input unit; a video composing unit which can compose a video processed by the first Retinex processing unit and a video processed by the second Retinex processing unit in accordance with a feature of the video inputted from the video input unit; and a display unit which can display an output video of the video composing unit.