| 摘要 |
A matching section (11) performs motion estimation upon a predetermined processing unit of input video (p) by, e.g., an iterative gradient method. A motion vector (v) obtained by the iterative gradient method is obtained by the expression v = alpha . DELTA v + v0 (wherein v0 indicates an initial displacement motion vector and DELTA v indicates a differential vector). A characteristic amount extraction section (12) extracts a characteristic amount, e.g., a variance of magnitude of a vector or a standard deviation thereof from the distribution of motion vectors obtained by the motion estimation. A parameter determination section (13) determines a conversion parameter alpha applied to the next processing unit by the characteristic amount. If the characteristic amount is equal to or larger than a predetermined threshold, the conversion parameter alpha is determined to be larger (e.g., alpha = 1). If the characteristic amount is smaller than the threshold, the conversion parameter alpha is determined to be smaller (e.g., alpha = 0.1). According to the present invention, it is possible to provide a matching device in which even when pictures whose appropriate matching processings are difficult to exist at the same time are provided, these processings can exist at the same time. <IMAGE> |
