opencv——同一窗口显示同色彩图像

这里主函数要使用ROI函数和addWeigth函数来实现

#include<iostream>#include<opencv2/highgui/highgui.hpp>#include<opencv2/imgproc/imgproc.hpp>using namespace cv;using namespace std;int main(){    Mat img1 = imread("1.jpg");    if (!img1.data)    {        cout << "oh,no.open failure" << endl;    }    //namedWindow("picture1", WINDOW_AUTOSIZE);    //namedWindow("picture2", WINDOW_AUTOSIZE);    //imshow("picture1", img1);    Mat img2 = imread("2.jpg");    //cvtColor(img1, img2, CV_RGB2GRAY);    //imshow("picture2", img2);    //新建一个名为expanded的Mat容器。高度和img1相同，宽度为两倍    Mat expanded(Size(img1.cols+img2.cols,img1.rows),CV_8UC3);//图像色彩一致    cout << "expanded.cols" << expanded.cols << endl;    cout << "expanded.rows" << expanded.rows << endl;    Mat ROI = expanded(Rect(0, 0, img1.cols, img1.rows));//从坐标原点开始输入第一幅图    cout << "ROI.cols" << ROI.cols << endl;    cout << "ROI.rows" << ROI.rows << endl;    Mat ROI1 = expanded(Rect(img1.cols, 0, img2.cols, img2.rows));//接第幅图之后显示第二幅图    cout << "ROI1.cols" << ROI1.cols << endl;    cout << "ROI1.rows" << ROI1.rows << endl;    addWeighted(ROI, 0, img1, 1, 0., ROI);    addWeighted(ROI1, 0, img2, 1, 0., ROI1);    namedWindow("muldisplay", WINDOW_NORMAL);//正常显示才能完整显示    imshow("muldisplay", expanded);    waitKey(0);    return 0;}

opencv中不同与matlab可以直接调用subplot实现多幅图像在同一窗口的显示。