差分帧法的目标跟踪的主要思想是，将当前帧图像与前一帧图像做一个差分，对差分的图像取绝对值后进行二值化-The main idea is to target track of the difference fr a me method, the image of the current fr a me and a previous fr a me image to make a difference, taking the absolute value of the differential im