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, in accordance with the airspace adjacent to the level of block movement, adaptive search strategy to choose, for a small movement blocks, take full advantage of center-biased characteristics of algorithms improve the speed of movement of large pieces of the algorithm using multi-candidate seeks to be the true value of the overall situation minimum, to ensure a variety of image sequences have a high search speed and accuracy)