OpenCV自学笔记24. Raspberry pi +OpenCV 读取摄像头

Raspberry pi +OpenCV 读取摄像头

在Raspberry pi上调用摄像头，读取视频流中的每一帧，并利用Canny边缘检测，提取每一帧中的边缘，最终效果如下：

ReadVideo.cpp

#include "opencv2/opencv.hpp"using namespace cv;int main(int, char**){    VideoCapture cap(0); // open the default camera    if(!cap.isOpened())  // check if we succeeded        return -1;    Mat edges;    namedWindow("edges",1);    for(;;)    {        Mat frame;        cap >> frame; // get a new frame from camera        cvtColor(frame, edges, CV_BGR2GRAY);        GaussianBlur(edges, edges, Size(7,7), 1.5, 1.5);        Canny(edges, edges, 0, 30, 3);        imshow("edges", edges);        if(waitKey(30) >= 0) break;    }    // the camera will be deinitialized automatically in VideoCapture destructor    return 0;}

注：代码来自OpenCV官网

CMakeLists.txt

project( ReadVideo )find_package( OpenCV REQUIRED )add_executable( ReadVideo ReadVideo )target_link_libraries( ReadVideo ${OpenCV_LIBS} )

编译

cmake .make

运行程序 ： ./ReadVideo