OpenCV 例程

采集图片显示视频：

#include <iostream>
#include <opencv2/opencv.hpp>
 
using namespace std;
using namespace cv;
 
int main ()
{
 
    CvCapture *cap = cvCaptureFromCAM();  //CvCapture* capture = cvCaptureFromAVI("infile.avi");
    IplImage* img;
 
    cvNamedWindow("showImg");
 
    while()
    {
        img = cvQueryFrame(cap);
        if (!img)
            break;
 
        cvShowImage("showImg", img);
 
        char key = cvWaitKey();
        if (key == )
            break;
 
    }
 
    cvDestroyWindow("showImg");
    cvReleaseCapture(&cap);
    return ;
} 

按s键将图片存储到目录e:/src/cam/下

#include <iostream>
#include <opencv2/opencv.hpp>
 
using namespace std;
using namespace cv;
 
char path[];
 
int main ()
{
    char num[] = {};
    int i = ;
 
    CvCapture *cap = cvCaptureFromCAM();
    IplImage* img;
 
    cvNamedWindow("showImg");
 
    while()
    {
        img = cvQueryFrame(cap);
        if (!img)
            break;
 
        cvShowImage("showImg", img);
 
        char key = cvWaitKey();
        if (key == )
            break;
 
        if (key == 's')
        {
            itoa(i++, num, );
            strcpy(path, "e:/src/cam/img_");
            strcat(path,num);
            strcat(path, ".bmp");
            cvSaveImage(path, img);
            cout<< path <<endl;
        }
    }
 
    cvDestroyWindow("showImg");
    cvReleaseCapture(&cap);
    return ;
}