说明：  运动估计的算法源程序,搜索精度为半精度,方法是对整像素搜索到的匹配位置的领域像素进行内查,然后进一步搜索,找到更精确的匹配位置
( In the movement estimate algorithm source program, the search precision is half precision, the method is the match position domain picture element which searches to the entire picture element carries on looks up, then further searches, found the exact position )