void CrelaxMyFriendDlg::OnBnClickedOk()
{hdc = this->GetDC()->GetSafeHdc();// TODO: 在此添加控件通知处理程序代码string imAddr = "c:/Users/actorsun/Pictures/";string imAddr1 = imAddr+"rice.png";Mat relax1, positive;relax1 = imread(imAddr1);Mat relax;cvtColor(relax1, relax, COLOR_BGR2GRAY);threshold(relax, positive, 50, 255, THRESH_BINARY);imshow(positive);RNG rng(101);Mat a, b;int cout = connectedComponentsWithStats(positive, positive,a,b,8,CV_16U);imshow("1", positive);waitKey();vector<Vec3b> colors;for (int i = 0; i < cout; i++){Vec3b vec(rng.uniform(0, 256), rng.uniform(0, 256), rng.uniform(0, 256));colors.push_back(vec);}Mat result(positive.rows,positive.cols,relax1.type());for (int row = 0; row < relax1.rows; row++){for (int col = 0; col < relax1.cols; col++){int temp = positive.at<uint16_t>(row,col);if (temp == 0)continue;result.at<Vec3b>(row, col) = colors[temp];}}imshow("标记后的图", result);waitKey();return;
}

上面这个代码是MFC程序里面的一个函数，不能够直接运行，但是如果学过MFC相信没有问题完全能够看得懂。

上例当中，count=7.说明检测到7个连通域。