When using multi-frame image to extract target, image morphological dilation is used firstly to accumulate multi-frame image effectively and then associate the track with image flow method.

• 在利用多帧图像进行目标提取时，针对多帧图像积累的有效性保证问题，采取了在积累前进行图像形态膨胀的方法，通过图像流法进行多帧图像航迹关联。