opencv從攝像頭獲取圖片幀並做邊緣檢測

// opencv6_videocapturefromcamera.cpp : 此文件包含 "main" 函數。程序執行將在此處開始並結束。
//

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

using namespace cv;
using namespace std;

//debug下在lib文件的名稱後加d，release下不加d。


int main()
{
	VideoCapture capture(0);	// 0爲電腦自帶攝像頭
	/*capture.open(0);*/
	if (capture.isOpened())
	{
		cout << "已打開攝像頭" << endl;
	}
	else
	{
		cout << "攝像頭打開失敗" << endl;
	}

	while (1)
	{
		Mat frame;
		capture >> frame;	//讀取當前幀
		if (frame.data == NULL)
			break;
		imshow("讀取視頻的當前幀", frame);

		Mat edges;
		cvtColor(frame, edges, COLOR_BGR2GRAY);	//轉爲灰圖
		blur(edges, edges, Size(8, 8));		//降噪
		Canny(edges, edges, 3, 9, 3);	//邊緣檢測

		imshow("邊緣檢測效果", edges);

		if (waitKey(30) >= 0)
			break;
	}
	capture.release();
	return 0;
}