#include <stdio.h>
#include"opencv2/opencv.hpp"
using namespace cv; int main()
{
VideoCapture a();
Mat edge;
while ()
{
Mat frame;
a >> frame;
cvtColor(frame,edge,CV_BGR2GRAY);
blur(edge,edge,Size(,));
Canny(edge, edge, , , );
imshow("被canny后的视频",edge);
waitKey(); }
return ;
}