9-1.cpp

基于OpenCV的计算机视觉技术实现.rar

// ************************* 程序 9-1 ****************************
/*** 程序功能：
	获得摄像机图像，将其显示在窗口中

// ***************************************************************/

///*

#include "cv.h"
#include "highgui.h"
#include <cstdio>

CvCapture *capture;
int c;


void captureCAM ()
{
    IplImage *frame;

    while ( true )
    {
        frame = cvQueryFrame ( capture );
        //循环获得摄像机得到的帧
        if ( !frame )
        {
            break;
        }       
        if ( ( c = cvWaitKey ( 100 ) ) == 27 )
        {
            //当按键为esc的时候退出循环
            //cvReleaseImage ( &frame );
            break;
        }

        cvShowImage ( "Demo", frame );
        //将其显示于窗口中
    }
}

int main ( int argc, char **argv )
{
    capture = cvCaptureFromCAM ( 0 );
    //获取摄像头

    if ( !capture )
    {
        printf ( "Could not initialize capturing...\n" );
        return -1;
    }
    cvNamedWindow ( "Demo", 1 );	//构建窗口

    captureCAM ();

    cvReleaseCapture ( &capture );  //释放摄像头
    cvDestroyWindow ( "Demo" );		//释放窗口

    return 0;
}


  //*/