| 摘要 |
In a method of determining motion vectors for a picture signal, in which each picture is divided into blocks and a motion vector is determined for each block in at least two steps, a number of motion vectors being assumed to be possible in each step and a deviation function for each pixel of the block being used for each of these assumed motion vectors, the most favorable vector being selected in dependence upon the value of its deviation function and being selected as one of the assumed vectors for the next step, if any, an optimal insensitivity to noise is obtained in that in the first step a first predetermined value is subtracted from the determined value of the deviation function of the vector having the smallest length, the thus reduced value being subsequently compared with the determined values of the deviation function of the other assumed motion vectors, and in that in a subsequent step a further predetermined value is subtracted from the value of the deviation function of that assumed motion vector which was determined as the most favorable motion vector in the previous step, and in that the thus reduced value of the deviation function of this vector is compared with the values of the deviation function of the other vectors of the same step for determining the most favorable vector. Each further predetermined valve is allow than the lasts. <IMAGE> |
