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(0);  //CvCapture* capture = cvCaptureFromAVI("infile.avi");
    IplImage* img;

    cvNamedWindow("showImg");

    while(1)
    {
        img = cvQueryFrame(cap);
        if (!img)
            break;
        
        cvShowImage("showImg", img);

        char key = cvWaitKey(40);
        if (key == 27)
            break;
    
    }

    cvDestroyWindow("showImg");
    cvReleaseCapture(&cap);
    return 0;
} 

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[64];

int main ()
{
    char num[8] = {0};
    int i = 0;

    CvCapture *cap = cvCaptureFromCAM(0);
    IplImage* img;

    cvNamedWindow("showImg");

    while(1)
    {
        img = cvQueryFrame(cap);
        if (!img)
            break;
        
        cvShowImage("showImg", img);
        
        char key = cvWaitKey(40);
        if (key == 27)
            break;
    
        if (key == 's')
        {
            itoa(i++, num, 10);
            strcpy(path, "e:/src/cam/img_");
            strcat(path,num);
            strcat(path, ".bmp");
            cvSaveImage(path, img);
            cout<< path <<endl;
        }
    }

    cvDestroyWindow("showImg");
    cvReleaseCapture(&cap);
    return 0;
}