include
using namespace cv;
using namespace std;
int main( int argc, char** argv ) { if( argc != 2) { cout <<" Usage: display_image ImageToLoadAndDisplay" << endl;
return -1;
}
Mat src1,src2,dst;
double alpha=0.4,beta;
beta=1-alpha;
src1 = imread(argv[1], CV_LOAD_IMAGE_COLOR);
// Read the file
if(! src1.data )// Check for invalid input { cout <<"Could not open or find the image" << std::endl ;
return -1;
}
CvCapture* capture = cvCreateFileCapture("rtsp://192.168.1.158/H264");
if(!capture)cvReleaseCapture( &capture );
//释放视频占用的内存空间 IplImage* frame;
frame = cvQueryFrame( capture );
//获取视频的帧图片 if( !frame ) //如果没有图片的话停止播放 { cvReleaseCapture( &capture );
//释放视频占用的内存空间 return 0;
} src2=Mat(frame,cvRect(0,0,src1.rows,src1.cols));
addWeighted( src1, alpha, src2, beta, 0.0, dst);
namedWindow( "Display window", CV_WINDOW_AUTOSIZE );
// Create a window for display. imshow( "Display window", dst );
// Show our image inside it.
waitKey(0);
// Wait for a keystroke in the window cvReleaseCapture( &capture );
//释放视频占用的内存空间 cvDestroyWindow( "Example2" );
//销毁窗口return 0;
}
图像求和公式： 
文章图片
这里再说一个两路混音的公式：（并没有测试公式的效果） C = A + B - (A * B >>
0x10
)； if (C >
32767) C =
32767;
else
if (C < -
32768) C = -
32768;
