将Mat类型转为IplImage类型并计算它的均值和标准差,其中frame为Mat类型。

IplImage ipl;
ipl = IplImage(frame);
CvScalar mean, std_dev;
cvAvgSdv(&ipl, &mean, &std_dev);
cout << "该图像的平均值为:" << mean.val[0] << "\t标准差为:" << std_dev.val[0] << endl;