说明：  自适应算法,根据空域相邻块的运动水平,自适应地选择搜索策略,对于小运动块,充分利用中心偏置特性提高算法速度,对大运动块则利用多候选值算法力求得到真实的全局最小值,以确保对各种不同的图像序列都有较高的搜索速度和准确度
(Adaptive algorithm, based on the level of the adjacent block of airspace motion adaptively select the search strategy for small sports block, make full use of the center bias characteristics improve algorithm speed, motion block the use of a large multi-candidate algorithm seeks to get the real value of the global minimum value, to ensure a variety of different image sequences have a higher search speed and accuracy)