OpenCV C++ real-time video canny edge detection

Procedure description

// Program description: call the camera, detect the edge of the real-time video canny collected, and display it with Gaussian blur
// Operating system: Windows 10 64bit
// Development language: C++
// IDE version: Visual Studio 2019
// OpenCV version: 4.20

Code

#include <opencv2/opencv.hpp>
using namespace cv;

int main()
{
	VideoCapture cap(0);
	while (1)
	{
		Mat frame; //存储每一帧图像
		cap >> frame; //读取当前视频

		Mat edge, grayImage;	//参数定义

		cvtColor(frame, grayImage, COLOR_BGR2GRAY);

		//【3】先用使用 3x3内核来降噪（2*3+1=7）
		blur(grayImage, edge, Size(7, 7));

		//【4】运行Canny算子
		Canny(edge, edge, 0, 30, 3);

		//【5】显示效果图 
		imshow("【效果图】Canny边缘检测", edge);

		if(waitKey(30)>=0) break;//延时30毫秒
	}
	return 0;
}

running result

canny edge detection reference:

https://blog.csdn.net/m0_51233386/article/details/113687031