A key frame representative of a sequence of frames in a video file is selected by applying face detection to a video to select a key frame which may include people and has particular application to indexing video files located by a search engine web crawler. The aberrations may result from swath lines formed by thermal heating and from the ruling and screen angle of the image. Writing of the brightness information into each pixel is performed by applying an electric signal corresponding to the brightness information to the data line while the scanning line is selected. The second alignment layer is configured between the second substrate and the PSA liquid crystal layer. The first rupture members and the second rupture members are designed to break only when the load applied to the decoupler device reaches or exceeds a predetermined load value, and the second rupture members are designed to have sufficient fatigue strength as long as the applied load does not reach the predetermined load value. The system comprises a housing mounting a planar, circular pinion gear plate, mounted for rotation on a pedal powered rotary shaft, wherein the pinion gear plate has a series of recesses arranged in plural concentric rings about the rotary shaft.