新三步搜索算法对三步算法进行了适当的改进，在一定程度上弥补了TSS算算法在估计细小运动时的不足，并加入了半途中止的策略，进一步提高了搜索精度

-New three-step search algorithm on a three-step algorithm appropriate improvements to compensate for the deficiencies of the TSS Algorithm for estimating the small movement to a certain extent, and joined halfway through the suspension of the strategy to further improve the search accuracy