OpenCV摄像头视频的获取

#pragma warning(disable : 4996)
#include <cxcore.h>
#include <highgui.h>
#pragma comment( lib, "cxcore.lib" )

#pragma comment( lib, "highgui.lib" )void main(int argc, char *argv[]){ CvCapture* capture = 0;//视频流捕获 if(argc == 1 || (argc == 2 && strlen(argv[1]) == 1 && isdigit(argv[1][0]))) capture = cvCaptureFromCAM(argc == 2 ? argv[1][0] - '0' : 0);//从摄像头获得视频流 else if( argc == 2 ) capture = cvCaptureFrom***I(argv[1]);//从文件获得视频流 if(!capture) return; IplImage *current_frame_rgb = cvCreateImage(cvSize(320, 240), IPL_DEPTH_16U, 3); cvNamedWindow("Window 0", 0); while(capture) { current_frame_rgb = cvQueryFrame(capture);//获得一帧图象 cvShowImage("Window 0",current_frame_rgb); if(cvWaitKey(1)==27)//等待ESC键 break; } cvDestroyAllWindows(); } 首先加载OpenCV头文件和库。
#include <cxcore.h>
#include <highgui.h>
#pragma comment( lib, "cxcore.lib" )
#pragma comment( lib, "highgui.lib" )
cvCaptureFromCAM函数为获取视频图像从指定的摄像头，cvCaptureFrom***I函数为获取视频图像从指定的***I文件视频帧，获取的视频图像保存到CvCapture中，cvCreateImage产生image图像，存放在IplImage中，cvQueryFrame获取一帧图像到IplImage结构中，获得相应图片格式的图像数据。