| 摘要 |
<p>PURPOSE:To detect a movement vector at high speed with high accuracy by averaging the movement vectors of repective blocks by a first operating means under a weight corresponding to the classification of a classifying means. CONSTITUTION:A register 12 and a subtracter 14 calculate a density difference between time successive two field screens, that is, a time gradient (d) from a picture signal (g) inputted to an input terminal 10, a register 16 and a subtracter 18 calculate a space grandient gx' of a direction (x) within the pre-field screen and a register 20 and a subtracter 22 calculate a space gradient gy' of a direction (y) within the pre-field screen. Thus, the evaluation of an estimated result having an error owing to an approximate estimation expression can be made low by classifying respective blocks with considering an inclined directional space gradient component quantity by a second operating means and a classifying means and executing averaging with a weight corresponding to classification 62 by an averaging means 64. Thus, a movement vector can be found with high reliability as a whole.</p> |
