首先需要提起學習者的興趣：

#include<opencv2/opencv.hpp>
#include<opencv2/highgui/highgui.hpp>
#include<opencv2/imgproc/imgproc.hpp>
#include<iostream>

using namespace std;
using namespace cv;

int main()
{
	VideoCapture capture(0);
	Mat frame, grayImage;

	while (waitKey(30) != 27)
	{
		capture >> frame;

		//canny邊緣檢測
		cvtColor(frame, grayImage, CV_BGR2GRAY);
		blur(grayImage, grayImage, Size(7, 7));
		Canny(grayImage, grayImage, 128, 255);

		imshow("【攝像頭】", grayImage);
	}

	return 0;
}