| 摘要 |
In a global motion estimation, profiles are determined (Comp Prof) of frames of an input video signal by combining pixels in a first direction. The profiles are updated (Upd Prof) with a first shift (”x 12 , ”x 23 , ”x 34 ) to obtain updated profiles, and the updated profiles are matched (M/S) to obtain a secondary shift (”x' 12 , ”x' 23 ). Preferably, the first shift is a zero shift. Alternatively, the first shift is obtained by matching the profiles of mutually different frames. The updating may be effected by shifting one of the profiles over the first shift to obtain a shifted profile, and subtracting another one of the profiles from the shifted profile. If the first direction is the vertical direction, the profile may comprise a vertically combined (e.g. averaged) pixel value for each pixel in the horizontal direction. |
