中文说明：采用块匹配法计算运动矢量，选择经典的三步法进行搜索，配有相应的文献说明，利用MAD进行阈值选取，初步计算出两幅图像的运动矢量，为下一步全局运动的估计提供参数。
English Description：
Calculated using block matching motion vector, choose the classic three-step method to search, with a corresponding literature shows that the use of MAD threshold selection, preliminary calculations of the two images of the motion vectors, the next step to provide parameters for the estimated global motion.