OpenCV学习笔记（2）-----开启摄像头

来源：互联网发布：如何进入DOS linux 编辑：程序博客网时间：2024/05/02 16:49

本文记录了opencv 3.1.0 在Ubuntu 16.04系统下启动笔记本缺省摄像头的一些简要代码。

#include <opencv2/opencv.hpp>#include <opencv2/highgui/highgui.hpp>#include <iostream>using namespace std;using namespace cv;int main(int argc, char** argv){VideoCapture cap(0); /*open the default camera device*/if(!cap.isOpened())  /*check open result*/  return false;cout<<"Original size:"<<cap.get(CV_CAP_PROP_FRAME_WIDTH)<<" "<<cap.get(CV_CAP_PROP_FRAME_HEIGHT)<<endl;cap.set(CV_CAP_PROP_FRAME_WIDTH, 160);cap.set(CV_CAP_PROP_FRAME_HEIGHT,120);cap.set(CV_CAP_PROP_FPS, 10);cout<<"Modified size:"<<cap.get(CV_CAP_PROP_FRAME_WIDTH)<<" "<<cap.get(CV_CAP_PROP_FRAME_HEIGHT)<<endl;        cvNamedWindow("camera show", CV_WINDOW_AUTOSIZE);Mat frame;while(true){cap >> frame;imshow("camera show", frame);if(waitKey(10) == 27) //press key “ESC” to quit from loop  break;}return 0;}

下面的code是将上面显示彩色图像进行‘转灰度“->"高斯滤波"->"边沿检测"后再输出：

#include <opencv2/opencv.hpp>#include <opencv2/highgui/highgui.hpp>#include <iostream>using namespace std;using namespace cv;int main(int argc, char** argv){VideoCapture cap(0); /*open the default camera device*/if(!cap.isOpened())  /*check open result*/  return false;cout<<"Original size:"<<cap.get(CV_CAP_PROP_FRAME_WIDTH)<<" "<<cap.get(CV_CAP_PROP_FRAME_HEIGHT)<<endl;cap.set(CV_CAP_PROP_FRAME_WIDTH, 160);cap.set(CV_CAP_PROP_FRAME_HEIGHT,120);cap.set(CV_CAP_PROP_FPS, 10);cout<<"Modified size:"<<cap.get(CV_CAP_PROP_FRAME_WIDTH)<<" "<<cap.get(CV_CAP_PROP_FRAME_HEIGHT)<<endl;        cvNamedWindow("camera show", CV_WINDOW_AUTOSIZE);Mat frame;Mat gray;while(true){cap >> frame;                cvtColor(frame, gray, CV_BGR2GRAY); //change color to gray                GaussianBlur(gray, gray, Size(5,5), 1.5, 1.5); //Gauss filter                Canny(gray, gray, 0, 100, 5); //edage detection                imshow("camera show", gray);if(waitKey(10) == 27) //press key “ESC” to quit from loop  break;}return 0;}

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