1。访问在任何需要的帧所需像素 2。执行像素逐相对于第一帧帧差分像素 3。申请分类阈值 4。执行像素按有关透水框架像素帧差分 5。结合阈值的像素结果由像素帧差分-1. Access any desired pixel in any desired fr a me 2. Perform pixel-by-pixel fr a me differencing with respect to the first fr a me 3. Apply classification t