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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;
}