Opencv3读取摄像头视频并预处理后显示

#include <core/core.hpp>
#include <opencv2/imgproc/imgproc.hpp>  
#include <opencv2/highgui/highgui.hpp>  
#include <iostream>  
#include <set>
#include <opencv2\opencv.hpp>  
using namespace cv;


int main()
{
	//从摄像头读入视频
	VideoCapture capture(0);
	Mat edges;

	namedWindow("videoshow", 0);
	//循环显示每一帧
	while (1)
	{
		//读入图像
		Mat frame;  //定义一个Mat变量，用于存储每一帧的图像
		capture >> frame;  //读取当前帧
		cvtColor(frame, edges, CV_BGR2GRAY);//灰度化

		//二值化
		threshold(edges, edges, 120, 255, CV_THRESH_BINARY | CV_THRESH_OTSU);

		//使用3*3内核来降噪
		//  blur(edges, edges, Size(3, 3));//进行模糊

		//进行canny边缘检测并显示
		//  Canny(edges, edges, 0, 30, 3);

		imshow("videoshow", edges);  //显示当前帧
		if (waitKey(30) >= 0)
			break;

	}
	return 0;
}