中文说明：
在快匹配运动估计算法中，它的计算复杂度可以描述成：运算量=搜索点×块匹配准则。该表达式可以这样解释。在快匹配准则确定的情况下，如果一个匹配点的单位运算量确定了，这时动动估计的动算量就有直接取于搜索的点数，也就是取决于运动估计的搜索算法，实现了三步搜索法。
English Description：
In the fast matching motion estimation algorithm, its computational complexity can be described as: computation = search point × Block matching criteria. The expression can be interpreted this way. When the fast matching criterion is determined, if the unit computation of a matching point is determined, the computation of motion estimation is directly taken from the number of search points, that is, the search algorithm depends on motion estimation, and a three-step search method is realized