采用自适应阈值搜索停止算法，减少了运动估计搜索次数，并且基本保持运动估计的精度不变。
It adopts adaptive threshold stopping algorithm so as to decrease the time of motion search and keep the motion search resolution unchanged.
在这里，我把搜索输出的阈值设为100本书。
In this case, I set the threshold of the search output to 100 books.
当跑道区域面积超过一定阈值时，通过采用搜索跑道边缘特征灯光的方法来识别跑道，准确性较高。
While the area of runway is big, the runway is recognized by the method of searching characteristic light of runway boundary.
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